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Showing most informative content since 02/22/2018 in Posts

  1. 23 likes
    Hi all, I am noticing an increasing number of sellers (especially those based in Asia) who advertise on Facebook, Instagram, WeChat and other social media instead of eBay. Unfortunately, many of them do not use Paypal. As you know, not every payment platform has buyer protection. To protect yourself, please carry out these checks: 1) Find out why the seller doesn't use Paypal. Is it for a legitimate reason? E.g. a Lebanese seller can't use Paypal as it's restricted there. Mainland China sellers apparently, CAN use Paypal, so take extra care if they refuse to use it. 2) Check the seller's track records. Ask friends and trusted collectors if any of them have ever made successful dealings with the seller. 3) Beware of similar photos on multiple platforms. Scammers sometimes create fake profiles that look just like a legitimate dealer, and steal their pictures as well. Perform background checks. Don't just assume that a dealer has multiple accounts, FIND OUT. Message him on his separate accounts (e.g. Facebook and eBay) and see if he notices. 4) Beware of non-Paypal platforms such as AliPay, WeChat and Western Union etc. There is little-to-no buyer protection on them. Don't send your money over unless you are absolutely sure of this deal. 5) Ask questions! Does the dealer know what shipping to use? Can the dealer take multiple photos of the fossil for you at specific angles you request? Is the dealer evasive with his answers? Is the deal too good to be true? There is no such thing as too much checking. 6) Be objective. It doesn't matter how friendly a dealer is. He could be the friendliest man on the planet, asking you about your family and work, laughing at your jokes, liking all your pictures. Most of the time, all they want is your money. Dealers who genuinely want to be your friend are rare gems, and worth holding on to. 7) Facebook mutual friends / Instagram followers doesn't matter. Scammers can make attractive accounts and add a thousand friends just to look trustworthy. I've seen a scammer FB account that shared over 100 mutual friends with me. 8) Does your credit card protect you? Assuming the dealer is sketchy, but you are somewhat sure of this deal, find out if your credit card/bank can protect you if this is a scam. Take note that AliPay doesn't work with many major credit cards. 9) If all else fails, demand Paypal. If the dealer genuinely wants business, and he operates in a country with Paypal, then it's in his best interest to use Paypal. Remember - great fossils appear every other day. Is this deal so special as to be worth the risk you're taking? Lastly, don't forget to post some pictures here at TFF; there are many experts here more than willing to share their expertise. Good luck!
  2. 20 likes
    Posted here are some very nice fossils for collectors just be aware that the descriptions might not be as advertised. Seller calls this a Pterosaur claw, I'm not sure what it belongs to but nothing is published to support his claim Seller list this as a superb Spinosaurus phalanx toe bone. Looks more like a hand bone, carpal or metacarpal. Also we do not know if it comes from the species Spinosaurus better described as Spinosaurid indet. Seller is describing this as a Spinosaurus caudal vertebra. Spino caudal vertebrae are typically more box shaped so I doubt it's from one. Not certain what's it's from. Seller is offering a very nice upper and lower jaw bone from the Pterosaur Alanqa saharica. I question if these are associated and if either are lowers jaw sections.. Ibrahim's reconstructed jaw shows the mandible as being much thinner than the upper and more like the offering. I also will add that isolated upper jaws may be hard to identify to a specific species and are better described as Azhdarchoid indet. since along with Alanqa the new species Xericeps may have similar uppers but it's currently unknown. Seller is offering this pair of bones as a Spinosaurus Phalanx bone and Claw. Unfortunately the phalanx is a hand bone, carpal and not associated with the claw. The claw may belong to one of the Spinosaurid's but without a ventral view it's uncertain its one. Offering for a large toe bone from a Spinosaurus. Looks more like a Carpal from an unknown Spinosaurid. Offering big money for this Spinosaurus complete foot. Unfortunately there are many things wrong with this foot. Most of the phalanx don't fit their positions and may not be Spinosaurid. The claws are undersized for the foot and cannot determine if they belong to a Spinosaurid with the photos that are provided. A foot should look like this Remind buyers that all teeth offered as Spinosaurus may not belong to that species but one of the other Spinosaurids that may be present in that fauna either currently described or yet to be identified
  3. 18 likes
    Many forum members are familiar with Cookiecutter Creek in South Florida. This is a small creek that well-known forum member Jeff @jcbshark was kind enough to share with me a little over 3 years ago. Jeff had posted photos of the tiny Cookiecutter Shark (Isistius triangulus) teeth that he had found picking through micro-matrix from this creek and that started my quest to obtain a tooth from this very unusual little shark. After picking through many gallons of micro-matrix from the Peace River and some of its feeder creeks without once laying eyes upon a single Isistius tooth (but finding tons of other micro fossils), Jeff informed me that he didn't think Cookiecutters could be found anywhere other than one special little creek and agreed to take me and Tammy to collect some micro-matrix there in mid-December 2014. It didn't take long for me to find my first complete Isistius. Several more soon followed including some from the positionally rare symphyseal spot in the middle of the lower jaw. It is possible to identify a symphyseal as the thinner area where each tooth overlaps the adjoining tooth is usually found with one overlap area seen on the inner and one on the outer surface of each tooth but not symphyseals. Since these teeth overlap BOTH the tooth to the left and right (like the top row of shingles on the ridge of a roof) the overlap marks are both found on the inner (lingual) surface of the tooth and no marks are found on the outer (labial) surface. Once you know how the teeth of the lower jaw overlap and how to identify the outer (labial) side of the tooth (the enamel does not stop at a well defined line but extends down from the triangular crown and onto the square root), you can also tell which side of the jaw (left or right) that the tooth came from. Aside from the symphyseal position most of the other teeth cannot be identified to position other than the last one or two posterior positions. These teeth have the crown angled with respect to the root. Here are some of my old posts showing Cookiecutter Creek and the micro-fossils that have come from this unique locality in Florida: http://www.thefossilforum.com/index.php?/topic/51286-collecting-cookiecutter-shark-micro-matrix/ http://www.thefossilforum.com/index.php?/topic/55298-more-micros-from-the-peace-river-and-cookiecutter-creek/ http://www.thefossilforum.com/index.php?/topic/71406-optimizing-micro-matrix-sorting/ Recently, I've been working on a project with a PhD student from the University of Florida which was initiated when it was realized that the Isistius triangulus teeth that I donated to the FLMNH were not yet recognized as occurring in Florida. Additional research revealed that specimens of Squatina (Angelshark) teeth from this creek were also not known from Florida (though I've also found this genus in micro-matrix from the Peace River). I made another collection of micro-matrix from Cookiecutter Creek as I had exhausted my supplies. A couple of flat-rate boxes of this material made their way into the hands of a couple of forum members--who I hope are having fun with this unique micro-matrix. Tony @ynot had sent me photos of another interesting find from Cookiecutter Creek. Jeff had collected some additional micro-matrix on the day that he introduced me to this site. Some of that collection was later made available to Tony as an auction to benefit the forum. While looking through this micro-matrix, Tony discovered a small specimen of what appears to be a Catshark (Scyliorhinidae) tooth. Tony is graciously sending that tooth to me so that I can pass it along to be added to the collection at the Florida Museum of Natural History (FLMNH) as this is the first record of this shark family in the Florida fossil record (and another first for Cookiecutter Creek). Tony's photo if this micro beauty: Since learning of the possibility of this taxon being found in the micro-matrix of Cookiecutter Creek, I've been searching through my remaining stash from this locality hoping to find a second Catshark tooth (no luck yet). While I've (so far) struck out in duplicating Tony's amazing find, I did have a bit of luck last week with something else new from my searching. While picking through the micro-matrix I came across an elongated item just about 10mm in length. If I'd not been familiar with this type of highly unusual shark tooth before I might have passed it by thinking it was just some unidentifiable fragment of bone. Experience and knowledge (even just a small amount) allowed me to recognize this as a tooth type that is reasonable common in another type of wonderful micro-matrix--Shark Tooth Hill (Bakersfield, CA). The unusual tooth from Cookiecutter Creek is actually quite common in STH micro-matrix. It comes from a Horn Shark (Heterodontidae). Since there is currently only a single genus described for this small family of small sharks, it can actually be identified down to the genus Heterodontus. These are placid little sharks that I remember seeing resting on the bottom during the few dives I did among the kelp forests in southern California's Channel Islands. They have distinctive ridges over the eyes and a single spike at the leading edge of their two dorsal fins. They feed mainly on hard-shelled invertebrates (crustaceans, molluscs, and echinoderms). Their name "Heterodontus" derives from the Greek meaning "different teeth" and referring to the fact that the front teeth are pointy with larger central cusp flanked by a smaller cusp on either side. The back teeth elongated with a long ridge running the length of the tooth and are adapted to crushing the hard shells of their prey items. https://en.wikipedia.org/wiki/Horn_shark Currently, most members of this family are found in the Indo-Pacific--like the well-known Port Jackson Shark (Heterodontus portusjacksoni) and only the Californian Horn Shark (Heterodontus francisci), the Galapagos Bullhead Shark (Heterodontus quoyi), and the Mexican Hornshark (Heterodontus mexicanus) are found in the eastern Pacific off the west coasts of North and South America. It's difficult to make any firm conclusions from the scant images available online but the rear teeth of the Mexican species to have a reasonable resemblance to the specimen that turned up in Cookiecutter Creek. Today, there are no species from this family inhabiting the Atlantic (or the Caribbean or Gulf of Mexico regions). Devoid of any factual information but attempting a modestly educated guess, I'm thinking that one of the species of Bullhead Sharks must have extended over into the waters surrounding Florida some time before the Isthmus of Panama formed some 2.8 mya separating the Atlantic and Pacific Oceans and separating the fauna on either side to either develop into distinct species (or to go extinct regionally). Since this family is not currently known from the Atlantic (eastern or western extents) it seems more reasonable to assume that the Florida specimen derived from an eastern Pacific species given the (geologically) recent connection to those waters. Fun to speculate and if Marco Sr @MarcoSr has jaw samples of extant eastern Pacific members of this family, perhaps a better comparison to the anterior teeth might be possible. Both this tiny Heterodontus tooth and Tony's find of the Scyliorhinidae will soon be headed toward Gainesville. I'm hoping to get up to volunteer at Montbrook in the next couple of weeks and plan on dropping off a few donations to expand the museum's diversity of shark teeth from Florida. Cookiecutter Creek is a special little creek and is best known for its relative abundance of Isistius triangulus teeth. The more we investigate this locality and the more micro-matrix we pick through from there the more unusual taxa seem to turn up. Seeing a perfect little Cookiecutter tooth appear from the micro-matrix is always a thrill but this creek is no longer a one-trick pony. It seems to have hidden depths (for a creek that is only knee high ) and I'm looking forward to seeing what else might appear out of the gravel in the future. Cheers. -Ken
  4. 13 likes
    I have not posted in a while and wanted to share an amazing fossil that i collected in December of 2017. Sharks usually do not come to ones mind when discussing Illinois fossils. Many collectors are not aware that you can find complete shark skeletons. Illinois is fortunate to be one of the few places in the world to find complete Pennsylvanian aged sharks. The vast majority of these fossils are found within siderite concretions in the Mazon Creek deposit. These rare sharks are always found as immature individuals. Illinois also has limited exposures of black shale similar to the Mecca Quarry Shale of Indiana. This shale was extensively studied by Rainer Zangerl in the 1960s and 70s and is known for the variety of sharks that he uncovered. I have been collecting a small exposure of this shale for the past 20 or so years finding a variety of bivalves, crustaceans, nautiloids and occasional fish. Most of the fish are fragmentary and usually not well preserved. I have shared pictures of a few of the specimens I have collected in past posts. One of the most interesting fish that I have collected is a little known group of sharks called Iniopterygians. They are also referred to as flying sharks due to the unusual placement of the pectoral fins mounted high up on the shoulder. It is believed that these fins would have functioned similar to the fins in modern flying fish. They have large eyes, club like tails and very unusual tooth batteries. There are several described types mostly known from fragmentary remains. Since preservation in black shale is usually poor, most of the described specimens are x-rayed rather then prepped to help identify bones and bone structures. The specimens that I have collected have all been relatively small ranging from five to six inches. This new specimen is by far the largest and best preserved example that i have ever seen. The specimen measures a little over a foot in length. Due to the quality of preservation, I had a friend spend nearly 40 hours prepping out the fish. It appears to be quite a bit different from other examples that I have found. If anyone on the forum knows of any researchers who work with these sharks, please let me know. Enjoy!
  5. 13 likes
    Here's a new fossil shape I just learned that maybe others will find interesting or useful. This muffin is a broken segment of the "annulosiphonate deposits' from a Carboniferous nautiloid. I can certainly say this would've completely stumped me had I found one of these before learning this!
  6. 13 likes
  7. 12 likes
    I post this as a reminder to Dinosaur tooth collectors that the Kem Kem Beds is not the only place that you need to be careful when you are looking to buy teeth but offerings from the States can be problematic. New collectors should to be especially mindful that sellers are not always accurate in what they are selling. Best to ask us B4 you buy. Here are a few examples: A beautiful Tyrannosaur tooth is being offered and sold as Albertosaurus from the Judith River Formation of Montana. Unfortunately this species is not described from this locality and currently only known from very late campanian, early maastrichtian deposits of the Horseshoe Canyon Formation in Alberta. You cannot distinguish between species of Tyrannosaurid teeth from campanian deposits. So this tooth is either a Daspletosaurus or Gorgosaurus tooth. Best identified as Tyrannosaurid indet. Aublysodon pre-max tooth is being offered from the Judith River of Montana. Unfortunately this species is no longer considered valid and teeth of this morphology are assigned to other Tyrannosaurids. In this formation, it's either a Daspletosaurus or Gorgosaurus tooth. Nice tooth best identified as Tyrannosaurid indet. An offering of a Nodosaurs tooth, Edmontonia rugosidens from the Hell Creek Formation. Unfortunately this species is not described from the Hell Creek Formation. Currently only Denversaurus schlessmani is the only described Nodosaur from the Hell Creek/ Lance Formations. Again a nice tooth. Be aware that other Nodosaurs may exist in these localities and this tooth is best described as Nodosaurid indet. but until those discoveries are made calling it Denversaurus is acceptable. The Ceratopsian Leptoceratops gracilis is being offered from the Hell Creek Formation. Again this species has not been described from this formation. The teeth are however identical to those L. gracilis and should be identified as: c.f. Leptoceratops gracilis. until we have a named species described. Daspletosaurus tooth being offered from the Judith River Formation. Similar comment as my first one. You cannot distinguish between species of Tyrannosaurid teeth from campanian deposits. Either a Daspletosaurus or Gorgosaurus tooth. Best identified as Tyrannosaurid indet.
  8. 12 likes
    Velociraptor is a dromaeosaurid so it hand claws have the morphology typical of that family. This species claws are not very large in fact they are pretty small, this one is about 4 cm straight line so that is one key feature. The articulation surface is more of a half moon shape. The species Oviraptor philoceratops has much bigger hands with claws that are quite a bit larger, see photo scale. Another feature to look at is what I call the "trigger" or the lip on the dorsal edge that I have circled, it's very pronounced. The shaft is also wider (see arrows) on the side view where Dromaeosaurid's have much more of a curvature
  9. 11 likes
    Last month, @Troodon kindly posted a notice of the offer of the Dino 101 course from U of Alberta. This online course (MOOC) was pursued by several Forum members. I hope they have enjoyed it, as I did, when I was previously enrolled. Yesterday, I signed up for "Paleontology, Ancient Marine Reptiles" also an online course offered by U of Alberta. The course is available through Coursera.org, the same group that sponsored Dino 101. It is set to start on March 28. However, the lectures and all course material is currently available. I have already completed the first lesson. I assume, when the course officially kicks off there will be a real time discussion board added, that is monitored by U of Alberta grad students. That's the way other courses via Coursera have worked. It's FREE!!!!! That is, unless you wish an official certificate of completion. snolly has all the official academic baggage he will ever need or want at this stage of life; so it's the cheap route for me! Parenthetically, I think these online courses are brilliant examples of the value of the Internet (This Forum being another). There are a couple of profs listed for the course. However, the first lesson's lectures were all delivered by W. Scott Persons, a doctoral student supervised by Dr. Currie. While I chuckled at Mr. Persons' affectation of an Indiana Jones fedora, worn as he lectured; the content was first rate, fascinating! Mr. Persons' style of delivery, energy, and mastery of the subject insured that the lectures easily maintained my attention. As an autodidact in the field, I find opportunities like this one extremely valuable. Check it out. I think you will be pleased.
  10. 10 likes
    I've been cleaning and remodeling my son's old room these past few weeks, making it a safe and presentable guest room for my son's son, my 4-year-old grandson. Lots of dinosaur stuff in the room now. As I was cleaning out old baseball and hockey cards I had a fossil-brained idea. Such ideas usually lead to many hours of neglect for all the responsibilities of a husband and homeowner, even one who is supposedly retired. This particular idea involved those "collectible" baseball and hockey cards. Why not "collectible" fossil cards? Not just photos though. Real fossils. Even better, how about using the cards to display my own small but growing microfossil collection. Some fossils I've found in gravel matrix I've collected myself, but mostly matrix I've obtained from other TFF members, especially @Sacha I thought about attaching those wonderful little "gem jars" to the cards, but they really wouldn't be ideal for this job. I ordered, instead, a package of 19mm coin capsules, exactly the size of a U.S. penny. Each capsule would hold a microfossil and each card would include a photo of that fossil and it's relevant information. I liked the idea, and I gave it a try. Here's how it looks so far. There are a few ID's I'm not actually sure about, but I wanted to get going on the cards. I'll fix them as need be. Each card has a catalog number that refers to the photo files for that fossil. I attached the coin capsules with either Velcro dots or that tacky putty stuff that's not supposed to damage walls. I wanted the capsules to be removable. Each capsule has a small label inside with the catalog number, in case it falls off the card. I put a bit of cotton in each capsule, and the fossils are sitting on the cotton. I would love to find 19mm foam dots, but the cotton will do for now. The millimeter rules are at the same scale as the photos. The cards fit in anything designed to hold a baseball card collection, mostly boxes and album pages. They also stand nicely in those little plastic frame holders. I used different colors for each location, so far, to make it easier to keep track the cards and the fossils. When I add more locations I might have to change the designs a little as well. It's been a bit of a slow process so far, it should be quicker in the future. I think any shark teeth that could fit in these 19 mm capsules would display nicely as well, as long as they aren't too thick for the container. I'd be glad to hear any ideas which might improve the usefulness of the cards, or any inaccuracies you notice. I'll be posting a few of my questionable ID's in the ID section soon. Thanks for looking. Mike Most of my current ID's are thanks to the incredible photos and research by TFF members @oldbones @MarcoSr and @Al Dente, and others as well. Thank you!!!
  11. 10 likes
    On the International Women's Day - best wishes to all female fossil hunters. W wonderful O outstanding M marvellous A adorable N nice GIRLS ROCK!!!
  12. 9 likes
    These micros came from Eocene, Orangeburg Formation matrix from the LaFarge Quarry in Harleyville, South Carolina. This matrix was given to me by Larry Martin years ago and I just recently had the time to finish searching it. The matrix was very fine, what fell through a 1.5 mm sieve. It was very time consuming to search the matrix because of the small size. I usually only sample matrix this fine but looked through all I was given because it contained both oral and rostral sawshark specimens. I found 14 oral and 6 rostral sawshark teeth (Pristiophorus sp.). One oral (1 mm) and two rostral teeth (2 mm & 3mm)are shown below. Sawshark teeth are very rare from the East Coast of the United States. (Note these are sawshark not sawfish) I found a good number of Mustelus sp. (1 mm). Mustelus are actually pretty common, especially in a lot of Miocene formations, but aren’t collected very often because of their small size. I found a single Dasyatis sp. (1 mm) A nice Heterodontus juvenile anterior tooth (1 mm) Lots of catshark teeth (1 mm – 1.5 mm) Lots of different fish teeth (Note the fish teeth are in a 1 inch diameter gem jar) Lots of placoid scales (less than 1 mm) and a few ray dermal denticles (1 mm). Placoid scale Dermal Denticle Marco Sr.
  13. 9 likes
    I'm very fond of crinoids and i always paint them white. So when i look at rows of them, i feel the world's alright. I have some teeth of dinosaurs, the colour of my Fez, It's realistic - whatever anybody says. The ammolite, I leave alone, it's pretty as it is, The trilobites I colour green, it really is the bizz. I don't have a keichosaur but i would paint it grey. I tried to paint my wifey but it made her run away.
  14. 9 likes
    Everyone please use an internationally recognised scale in your images. Coins aren’t good enough. How big is s rupee, or a farthing? I dunno. Of course a marmite jar is the same size worldwide Vegimite is NOT internationally recognised. I hope you’re taking notes @Jesuslover340
  15. 9 likes
    So after piecing together and reconstructing the skull and prepping out the other bones from the matrix, this is what I ended up with:
  16. 9 likes
    Last part: Regarding casts or reproductions, those are not acceptable as holotype specimens because (1) it is impossible to be certain that the cast is exactly the same as the original, due to shrinkage or mechanical distortion of the mold, and (2) the cast does not reproduce every feature that might be of interest to future researchers. For example, a cast cannot be prepped further to reveal hidden features, or it cannot be used for CT scans to reveal internal features, and (as in the case of corals) it cannot be used to make thin sections to reveal internal features. One factor limiting research has been the need to examine type specimens before establishing new species, or synonymizing species (deciding they aren't really different, so the older name is conserved and the newer name becomes a junior homonym). Sometimes museums will mail specimens to researchers, but holotypes are irreplaceable and so many museums won't do this due to the risk. The only alternative has been for the researcher to travel to all the relevant museums to examine the types, which is expensive and time consuming (though it has resulted in grad students from my department having to spend a summer in London and various other European cities examining insect collections, which they didn't mind too much). I think there has been some move towards substituting very high quality imaging and 3-D scans for some of this work, but types still have to be available in case other observations are needed. For example, there have been cases where a leg from a pinned insect is sacrificed to get DNA for a molecular analysis. This obviously could never be done from a high resolution image. Similar arguments can be applied to fossils. Don
  17. 9 likes
  18. 9 likes
    On a trip to the Peace River on November 28, 2012 I found a pretty nasty looking sea biscuit, but it has been the only one of it's type I've found in the Peace in 7 years of digging it so I've always held on to it without thinking about it too much. Since working with Roger Portell at the U of Florida on the donations of 2 Abertella deneleri sand dollars, I thought maybe I should ask him whether it was interesting and if so, would the museum like it. Here is his response: Yes, very interested in that specimen as well. It belongs to the genus Brissopsis and will soon to be named in an upcoming article of the Florida Museum of Natural History Bulletin. Most likely your specimen would become a paratype. I'm very pleased that they are interested in it so both echinoids will be on their way to the University Museum this weekend.
  19. 8 likes
    At our favorite auction site, new collectors can easily be impressed with a fossil crinoid like this: Even more so as it is a large (470mm X 260mm ), gorgeous fossil for display and highly impressive. So, I am posting this here as a alert to new collectors, who often for being inexperienced, end up believing that a ballot US $ 25 Dollars really can exist... First of all, it's interesting to know that in addition to the seller offers entirely free shipping to the world, it's also important that I explain to you that originally this fossil Crinoid is not white! The problem here is that a strange mass (I highlighted it in pink), is uniting dozens of broken crinoids mounted on a fake matriz plate, as if they were whole crinoids, and to disguise this great puzzle, they simply painted everything in white! And now, problem solved, for hardly a new collector would notice in this small but great detail! Look: Any more problems? Yes! All of these areas that I circled in pink are 100% sculpted by human hands! Look: Now you can compare of Guizhou, what is carved and what is 100% real, which is painted white and the one that has original coloration: I apologize for making your dream evaporate, of placing a Guizhou crinoid next to a Guizhou keichousaurus on your shelf... Do you intend to buy from another seller? No problem! On our favorite auction site there are other vendors who also market Guizhou fossil crinoids! See this one! 100% original coloring, and no sculpture made by human hands here! Look: Beautiful and amazing, is not it? 100% original coloring! But the only problem here is that you are taking to your home a new mosaic puzzle: And under the pretext of "pyritization" and "calcite," you will take entirely free to your home, a strange white mass of glue with something unidentified; But if you also did not like this, no problem, there are more choices of Guizhou crinoids on our favorite auction site: Oooooopppsss! Is gone away this option too! At our favorite auction site you will probably notice that a 100% genuine Guizhou crinoid fossil is nothing perfect, it may not be as gorgeous and complete: But at least now you know the difference between one thing and another thing!
  20. 8 likes
    I will leave you this week with a T.rex specimen that most folks are unaware of. Its Paul Sereno’s, University of Chicago, subadult arm. This is a published specimen: UCRC-PV1. This is the ONLY known complete arm of a T rex. And no they are not longer in a subadult as some who claim longer arms and claws in Nanotyrannus magically become smaller in an adult T-rex Close up of the Digit II hand claw. 5cm
  21. 8 likes
  22. 8 likes
    Crassiproetus crassimarginatus. A very rare bug to find complete, although I heard a nice one was found last fall.
  23. 8 likes
    The attached paper describes a diverse pterosaur assemblage from the late Maastrichtian of Morocco that includes not only Azhdarchidae but the youngest known Pteranodontidae and Nyctosauridae. The fossils described come from the upper Maastrichtian phosphates of the Ouled Abdoun Basin, in northern Morocco http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.2001663
  24. 8 likes
    If that's from the Yorkshire coast it's probably a Carboniferous erratic. I've found a few like it and I think they're hexactinellid sponge root tuft spicules (search Hyalostelia although that's just one genus defined by its main body spicules - the name is loosely used as a form genus for the roots). Another possibility is productid brachiopod spines though you'd expect some shells as well. 90% for sponge root tuft. - this area has the usual parallel structure before being broken up:
  25. 8 likes
    One of the sellers from above added material. A number of these type of bones were added and described as Spinosaurus Toe bones. This morphology of bone is a carpal from a unknown Spinosaurid. All very nice. i This bone was listed as a Spinosaurus hand bone, carpal. I think it's much to thin to be from a Spinosaurid and although not completely sure might even be a metatarsal from a crocodylomorph Lots of new teeth were listed and described as Dromaeosaur. Most are Abelsaurid some are, Juvie Carch or indeterminate but none are from the species Dromaeosaur. Unfortunately no small teeth from the Kem Kem can be assigned to a species or even genus. Sample of those being offered.
  26. 8 likes
    The snow had melted back enough in the lowlands that I could venture out to the Danube Valley yesterday in order to try my luck again in the infamous ditch at the side of the road. There was an awful lot of slipped-down overburden to clear out of the way and it also took a while chipping away at the exposure, so my battery was on the wane before I finally found a little pocket with a few retrievable fossils just before darkness set in. Most of what I found wandered into the trade or sell box, but this one here is reserved for my collection. Discosphinctoides sp. 10cm.
  27. 8 likes
    Thank you for the pictures. It's clear they have iron content, but they might be something else. I change my ID leaning toward Dahllite. Take a look here: SPHERULITIC CONCRETIONS OF DAHLLITE FROM ISHAWOOA, WYOMING " The dark material in the center of the concretions (Fig. 1) is translucent in thin sections and contains iron and a small amount of manganese, as indicated by microchemical and blowpipe tests, but it cannot be referredt o any mineral species a nd probably represents a mixture of oxides. Within this material calcite occurs, filling interstices, and in the dahllite, calcite occurs at the margins of cavities to a Iesser extent. The dark material seemst o be later than the dahllite and the calcite is probably still later. " Dahllite nodules
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    The genus Receptaculites is restricted to the Devonian. All the 'Receptaculites' from the Ordovician are now classified as: Fisherites "The best-known receptaculitids are the Ordovician to Carboniferous family Receptaculitidae, which in the Ordovician consists of a single genus, Fisherites, with nine species ranging from TS.2c through 6b. They are the largest receptaculitids known and are widely distributed in limestones and dolomites. Their wide geographic distribution is comparable to that of soanitids, except that the concentration of their distribution is in central North America. They are also found in the Canadian Arctic, Greenland, Baltoscandia, Burma, North Korea, Thailand, and the Argentine Precordillera but have not been reported from China." Nitecki, M.H., Webby, B.D., Spjeldnaes, N., & Yong-Yi, Z. (2004) Receptaculitids and algae. In: Webby, B.D., Paris, F., Droser, M.L., & Percival, I.G. (eds.) The Great Ordovician Biodiversification Event. Columbia University Press, 484 pp. The classification of receptaculitids is not algae or sponge, it is still unresolved Problematica. "We know that we have succeeded only in showing that receptaculitids were neither sponges, archaeocyathids, nor dasyclads, because the cumulative receptaculitid characters are not those of sponges or of algae. It is surely premature to ask what they were-we must still wait to know that. We are far from providing final answers, but we hope that others will be stimulated to ask new questions, and to accept receptaculitids as more than the sum of their characters. The preponderant lesson from our morphological analyses has shown us that complete understanding of the nature of the receptaculitids is not yet possible; therefore, in order to build a strong case on the nature of receptaculitids we either had to endlessly speculate, or admit our ignorance. The German idioms and expressions have changed since Rauff wrote (1892a:648), and the current rendition of his conclusions as shown in our Dedication (p. v) may now be rephrased. We now believe that we do not know enough to be definitive, and have been left no choice but to follow Rauff in retaining receptaculitids in the Problematica." (Translation of Rauff 1892a:648) "My investigation on the true nature of receptaculitids has had the painful result of again evicting these interesting fossils from their taxonomic position, and setting them adrift once more. Perhaps my observations on their most extraordinary structures will help some luckier, more informed person discover their true affinities. It is this hope which has caused me to publish this work even without its most important conclusion; at least it may serve as a basis for further analysis. Receptaculitids are again removed from their taxonomic position, without resolving their systematics, and it is hoped that the present paper will form the bases for future phylogenetic analyses." Nitecki, M.H., Mutvei, H., & Nitecki, D.V. (1999) Receptaculitids: a phylogenetic debate on a problematic fossil taxon. Springer Scientific Publishing, 241 pp.
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    This picture was taken in the Heyuang dinosaur museum at Guangdong China. So guess a geode like crystallized structure is possible in dinosaur eggs.
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    I may be wrong but this could be a (or part of a) entelodont molar. The occlusal surface is bunodont which is a feature found in the entelodontidae, and as far as I know South Dakota is famous for it's Oligocene mammalian faunas which include entelodonts such as Archaeotherium and Daeodon.
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    Pachyphyllum is Devonian. The Silurian rugosan Diplophyllum caespitosum looks like a better match. Oliver Jr., W.A. (1963) Redescription of three species of corals from the Lockport Dolomite in New York. United States Geological Survey Professional Paper, 414G:1–9 PDF LINK
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    I see your red fez, I want it painted black No colors any more, I want them to turn black I see the ammolite twinkle from a store's orderly rows I have to turn my head until my darkness goes I see the trilobites and they're all painted black With crinoids and my love, both never to come back I see people turn their heads and quickly look away Like a baby keichosaurus it just happens everyday (with apologies to The Rolling Stones)
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    Well, I think I was correct in my original thoughts here. Going through Grande,1982 , A Revision of the Fossil Genus tKnightia, With a Description of a New Genus From the Green River Formation I came upon this figure of bone counts for verts, fin rays, pterygiophores, etc. The counts I made on a few of the fish match the parameters given for Gosiutichthys parvus, as @jpc pointed out on the anal fin ray count. Rib, vertebra, and pterygiophore counts were a match as well. Thanks everyone for chiming in.
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    According to Grande 1984, anal fins seems to be the easiest way to ID them... I see about 10 anal fin rays in your past photo. G has 9-11, K has 13-15. The other main difference is actually where they are found; G is is found in Lake Gosuite deposits (closer to Rock Springs and Green River) and K is found in all three fossil lakes. G is NOT found in the classic quarries around Kemmerer that many of you are familiar with. I am saying Gosiutichtyes. Nice find. Fossils from these non-Kemmerer quarries is harder to to find.
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    Fake or Fossil? Ichthyosaur to ‘iffyosaur’ Part #1 https://www.youtube.com/watch?v=okjpbpD_My0 Fake or Fossil? UV exposes plaster Part #2 https://www.youtube.com/watch?v=rCss3BWohPI Dean R. Lomax - Life as a palaeontologis https://www.youtube.com/channel/UCnuR8gNE-GXYyiA8eE-5p2w A published paper about composites is: Massare, J.A. and Lomax, D.R., 2016. Composite skeletons of Ichthyosaurus in historic collections. Paludicola, 10, pp. 207-250. PDF file at: https://www.researchgate.net/publication/303932537_Composite_skeletons_of_Ichthyosaurus_in_historic_collections https://www.researchgate.net/profile/Judy_Massare http://www.academia.edu/26087070/Composite_skeletons_of_Ichthyosaurus_in_historic_collections http://brockport.academia.edu/JudyMassare “…we describe nearly complete skeletons of the Lower Jurassic genus Ichthyosaurus that are probably composites or that, at least, require further examination to assess their authenticity.” Yours, Paul H.
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    Yes, Either Holmesina septentrionalis or Holmesina floridanus. I am not sure how to differentiate the scutes.
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    These are the last pics I have of the tusk, majestic looking in its jacket. But despite valiant efforts to stabilize it, this tusk was lunch meat, and gravity took its toll. Check back in a year or 2 and perhaps there will be a painstakingly restored tusk to show.
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    A wild stab in the dark, but possibly the hypostome of a cheirurid like Ceraurus sp.? Your piece, flipped, compared to images from Moss, D. K. (2012). "Trilobite Faunas and Facies of the Upper Ordovician (Sandbian) Lebanon Limestone, Nashville Dome, Tennessee" (Masters Thesis, Uni. of Oklahoma). [image cropped from a post @piranha had put up some while back: http://www.thefossilforum.com/index.php?/topic/56785-trilobite-in-tennessee/&tab=comments#comment-604248 ]
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    Extremely rare, I never thought I'd get the chance to acquire one of these so I was very pleased when one came up for sale. Chitinobelus acifer Fischer 1981, a belemnite (or possibly belemnotheutid) whose rostrum was originally composed of aragonite with organic material. As a result, it's preserved as a compressed organic film with the aragonite lost to diagenesis. Belemnites are nearly always mostly calcite (largely thought to be primary) and preserve 3D in all sorts of rock. There is argument (quite complex) over whether this is an unusual aragonitic belemnite or something a bit different. There are prominent striations which are similar to those in the "normal" belemnite, Salpingoteuthis. From the Jurassic, Lower Toarcian Posidonienschiefer of Zell (not far from Holzmaden, Germany). As far as I know, this is the only locality it's been found. Phragmocone chambers just visible.
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    And, as tribute to the outstanding contributions of women to the field of paleontology, I'm pasting here the Library and Archives Canada's biographical summary of Alice E. Wilson, Canada's first woman geologist, first female member of the Royal Society of Canada, and wonderful contributor to our knowledge of trilobites in the Ottawa region. Hers is an inspiring story of triumph over male-dominated adversity and a lifelong journey of wonder and scientific curiousity. First female geologist in Canada and first woman to become a member of the Royal Society of Canada Alice Wilson was a remarkable woman in many ways. During her lifetime she struggled against ill health, struggled to obtain needed academic qualifications to pursue her work, and struggled to receive professional recognition and promotion in a man's field. It was her extraordinary determination and her enormous enthusiasm for her work that always carried her forward. Wilson was born in Cobourg, Ontario in 1881 to a family where scholarship, and the sciences in particular, were highly valued. In addition to a love of learning, Alice was introduced in her childhood to outdoor life, canoeing and camping with her father and brothers. Her early interest in the fossils in the limestone formations in the Cobourg area blossomed into a career as an eminent paleontologist noted for her detailed studies of the fossils and rock of the Ottawa-Saint Lawrence Lowland. Her early outdoor experience provided her with the skills, enthusiasm, and self-confidence for geological field work. Wilson entered Victoria College at the University of Toronto in 1901 studying modern languages and history and expecting to enter one of the few professions open to women - that of teaching. However, due to ill health, she was unable to return to university to complete her last year of studies. Once well, she worked in the Mineralogy Division of the University of Toronto Museum, thus beginning her career in the field of geology. In 1909, Wilson started work at the Geological Survey of Canada (GSC) in Ottawa as a museum assistant. She remained at the Survey the rest of her life, officially retiring in 1946 but maintaining an office there until shortly before her death in 1964. Throughout her career at the GSC, Wilson faced many barriers as a woman. Wishing to undertake field work, she wrote to her superiors "with reference to further field work of the more strenuous type, I would like to point out that while not heavily built, I am muscularly very strong, and from earliest childhood have been accustomed to an out-of-door life both with canoe and tramping." (Meadowcroft 1990) However, field work in remote areas with male colleagues was out of the question. She convinced the Survey to send her on short trips to the relatively unstudied Ottawa-Saint Lawrence Valley. For the next fifty years, she studied this area on foot, by bicycle and eventually by car. When the Survey would not issue her a car for field work as they did men, she bought her own. In order to advance her professional qualifications, Wilson first requested leave to undertake doctoral studies in 1915. At that time the Survey was granting paid leaves of absence for studies. Her request for leave was repeatedly denied. In 1926 Alice was given permission by the Survey to apply for a scholarship offered by the Canadian Federation of University Women (CFUW). However, when Wilson won the scholarship, the Survey again denied her leave. The CFUW lobbied this decision to the highest political levels and the leave was eventually granted. Wilson finally achieved her long-standing goal receiving her PhD in 1929 at the age of forty-nine. Returning to the Survey with doctorate in hand, she was repeatedly denied promotions and the professional recognition due to her. In 1935, when the government of R.B. Bennett was looking for a woman in the federal civil service to honour, Wilson was chosen to become a Member of the Order of the British Empire. Shortly thereafter, the GSC published her work for the first time in ten years and gave her a promotion. In 1936 Wilson became a Fellow in the Geological Society of America and in 1938 became the first woman Fellow in the Royal Society of Canada. After compulsory retirement at the age of sixty-five, Wilson entered what can be considered the happiest stage of her career. She continued her scientific work until months before her death. With the 1947 publication of her book The earth beneath our feet, Wilson completed a long-standing project of sharing her love of geology with children. From 1948 until 1958 she was a much-appreciated Lecturer in Paleontology at Carleton College (later Carleton University), enthusiastically leading her students into the field. Carleton University recognized Wilson both as a geologist and as an inspiring teacher conferring an honorary degree upon her in 1960. In tributes to her after her death, Alice Wilson was recognized as one of Canada's most respected geologists, a paleontologist of worldwide reputation, and an inspiring teacher. She should also be remembered for blazing a trail for women in what had previously been a man's world. Resources Meadowcroft, Barbara. — "Alice Wilson, 1881-1964 : explorer of the earth beneath her feet". — Despite the odds : essays on Canadian women and science. — Ed. Mariane Gosztonyi Ainley. — Montreal : Véhicule Press, c1990. — P. 204-219 Montagnes, Anne. — "Alice Wilson, 1881-1964". — The clear spirit : twenty Canadian women and their times. — Ed. Mary Quayle Innes. — Toronto : University of Toronto Press, c1966. — P. 260-278 Russell, Loris. — "Alice Evelyn Wilson". -- Canadian field naturalist. — Vol. 79, no. 3 (July-September 1965). — P. 159-161 Sarjeant, William A.S. — "Alice Wilson, first woman geologist with the Geological Survey of Canada". — Earth science history. — Vol. 12, no. 2 (1993). — P. 122-128 Sinclair, G.W. — "Alice Evelyn Wilson 1881-1964". — Proceedings and transactions of the Royal Society of Canada. — Series IV, Vol. IV (June 1966). — P. 117-121 Sinclair, G.W. — "Memorial to Alice Evelyn Wilson 1881-1964". — Proceedings of the Geological Association of Canada. — Vol. 16 (1965). — P. 127-128
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    " These are sometimes called "Wyoming golf balls". They are a rare type of concretion that formed in the Thermopolis Formation of the Cretaceous. We happen to have a lot of them right here around Cody. They are a little bit of a mystery, but we know that they contain a lot of different minerals. Some of these minerals are Calcium, Iron Phosphate, Manganese, Calcite, and Pyrite. Sometimes Dahllite is found in fossil bone." excerpt from here
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    @Geo2053: Let's try this again, but slower this time. 1. If you have not already, please read the link I provided in this thread on the paleontology of Wisconsin. Pay particular attention to the geologic age ranges of fossiliferous rocks in your state. Optionally, acquire a geologic map of your state and compare where you found these rocks with what the map says. Keep in mind that there is a difference between the bedrock geology and superficial geology. This is important because Wisconsin underwent a series of glaciation events that left a lot of till and dirt during the Tertiary, and so the superficial geology will indicate some of those features. By understanding the geologic age of any outcrops (bedrock geology), you can largely rule out plant and animal fossil species that did not inhabit that area during those periods. 2. Have a closer look at actual fossils. Pay attention to the distinct features and characteristics that make it a fossil. Fortunately, this forum is filled with images of fossils of all kinds for you to peruse. 3. Read up a bit more on how organisms fossilize. Learn a bit more about the fossilization process. 4. If you have something that seems to pass for a fossil given all the learning above, post it here, but take a plain shot of the object in good lighting conditions. By this I mean, full and normal overhead lighting - not murky lighting under magnification, not interrogation light blazing at the camera lens to make the rock glow. We have to see the natural rock first before trying to illuminate the inside. It is more often the case that fossilized inclusions will appear in amber, and Wisconsin would not have amber unless someone purposely acquired it from some other place and intentionally planted it there, or dropped it by accident. The probability is not very high on either of those circumstances. 5. As a vast majority of fossils appear in sedimentary rocks, it is not a bad idea to read up on the different kinds: https://geology.com/rocks/sedimentary-rocks.shtml (this link has some helpful information and images that show colours and textures). Not all sedimentary rocks contain fossils. The closest of any specimens you've posted in showing some possibly distinct fossil detail was your "snake head," which seemed to exhibit some kind of coral-like pattern. Take a normal, full-on overhead picture of that one from the top angle. Include something to indicate scale. Perhaps say what other rocks appear near it. Are they the same or similar?
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    I’m probably posting this in the wrong topic area. I’m not sure which it goes in. This link is from my alma mater. I’ve posted the link before. https://fossil.swau.edu/ It’s to their fossil database. Many of the fossils have a 3D viewer option where you can look at the fossil 360 degrees. I saw this Trodon tooth on there this evening and thought it was pretty cool looking. I can’t recall ever seeing a Trodon tooth on here before so I thought I’d share the link. It came from the Lance Formation in Wyoming. I’ve been on the dig a couple times. I can’t get the link to go directly to the tooth so you can view it 360, but if you click on the browse tab after you go to the link then type in the catalog # HRS06576 it will take you to it. There are over 20,000 fossils on there from the Lance formation. I saw lots of teeth on there. Some from species I’d never heard of before. This is another Trodon tooth I saw on there. I think it’s very cool looking. I forgot to crop my screenshot. Oops.
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    The "thingies" appear to be scaphopods.
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    Eggs can have crystallization like you posted above. In Terry Manning's Egg and Embryo Project many of his Therizinosaur eggs had crystallization like what you posted. The size of the eggs look similar to the ones you posted. Most likely these are authentic but do need some better pictures of the shell to confirm. You can see some of the crystal structure in the image below.
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    Those are rare and excellent finds with a high scientific interest. They are plant remains in chert. Chert nodules indicate Edwards. They are present in the Albian, Lower Cretaceous strata, of northwest Texas. One of the conifers resembles the extant genus Dacrydium, which might be my ID for the specimens in question. There were described also other species, like ferns, conifers, angiosperms. reference: B. S. Serlin. 1982. An early cretaceous fossil flora from northwest Texas: Its composition and implications. Palaeontographica 182B: 52-86
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    I believe this is a juvenile Diplomystus dentatus, based on the features noted on this photo.
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    Saurodon Fish Jaw 2/1/18 Dallas, TX USA Atco Formation of Austin Group 85 mya i finally found a jaw with teeth still attached