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Found 64 results

  1. In March of this year I found a heteromorphic ammonite that has had me curious ever since. So yesterday I finally sent an email about it to a local ammonite expert, Ron Morin, who is associated with the Dallas Paleontological Society. I had a correspondence with him in May of this year as it related to him identifying my Phlycticrioceras trinodosum heteromorphic ammonite which I recently added to 'Collections'. That's when I first talked to him. Then at the Dallas Paleontological Society's Fossil Mania event in October, I was talking to Roger Farish about my unidentified ammonite. He recommended that I contact him again for identification. Here is the email and the pictures that I sent him yesterday. I will post an update to this thread when he responds, which from my experience might be weeks. I have edited it to remove any slightly sensitive information like my name and more specific location information (I'm paranoid), as well as to fix any grammatical errors and to add relevant reference designations in between the < and > symbols: "Hello! I am Heteromorph, the one who contacted you to identify my Phlycticrioceras trinodosum specimen in May of this year, and I was wondering if you could help me identify another heteromorphic ammonite from the Upper Coniacian stage of the Austin Chalk. This specimen was found on March 23 of this year in a creek in Ellis county. It is, in fact, within half a mile of where I found the last specimen that I sent to you for identification. The stratigraphy of this area is the Atco member of the Austin Chalk, Prionocycloceras gabrielense zone. My problem is that even though it resembles P. trinodosum, there are differences that would make me reluctant to indenify it as such. To date, I have not found one like it. It is similar to P. trinodosum in that the whorl section is compressed, it has ventral tubercles, and it has an open planispiral shape. But it also has 3 key differences that make me think it is either a different species or it is very pathological. I list these below. First and foremost, the main difference is the lack of any ventrolateral tubercles, which are one of the defining characteristics of P. trinodosum. On both the specimen itself and its negative, it appears to be free of any ventrolateral tubercles. The only tubercles that I can see are the ventral tubercles which are something that P. trinodosum has as well. Second, the ribs are shaped differently than P. trinodosum. While P. trinodosum has rectiradiate ribs, this specimen has ribs which are rectiradiate until about half way up from the umbilicus, at which point it bends. Due to the fragmentary nature of this specimen, I have a hard time determining whether it bends abapically or adapically. Third, the ribs are more costate on this specimen than any of the twelve P. trinodosum specimens that I have found in the Austin Chalk. It has a rib index of 7, while the most costate specimen that I have found and know for sure is a P. trinodosum specimen only has a rib index of 5. While this is not unheard of for this species, with specimens of this species having rib indexes of up to 8 (Emerson et al. 1994), yet from my experience it is apparently very unusual for this part of the Austin Chalk. The closest thing that I have seen to my specimen is illustrated on Plate 11, fig 2 of Young, 1963 (as P. sp. cfr. douvillei), the similarity being the fact that they both have rib indexes of 7. After that, though, the similarity ends in that P. sp cfr. P. douvillei still has ventrolateral tubercles and rectiradiate ribs. I also found a very small P. trinodosum negative in the same creek just a few feet away. It has ventrolateral tubercles and a rib index of 4. The ribs are rectiradiate. A photo of it is not attached here. My specimen is 87mm long including its negative and has a whorl height of 34½mm. The oval whorl section is compressed like P. trinodosum. It is shown first in the attached photo DSCN5355. Aside from the specimen in question, for reference I have also attached photos of two P. trinodosum specimens that I have found. They are both from within 5 miles of the creek site, so they are on roughly the same stratigraphic level. What I am calling P1 is shown first in the attached photo DSCN5281 <F13> in comparison with the specimen in question. P1's negative is shown first in the attached photo DSCN5394 <22>. The positive is 69mm long when both pieces of it are measured together but 53mm when just measuring the largest piece. It has a whorl height of 31mm and a whorl breadth of 9mm. Rib index of 4. It was found within a quarter of a mile of the creek site. Because it is has just a slightly shorter whorl section to the specimen in question it is a good comparison piece. The specimen which I am calling P2 is shown in the attached photo DSCN5361 <F27>. It is only a negative but I am attaching a picture of it here because it is the specimen that I referenced earlier with a rib index of 5. It is 23mm long and has a whorl height of 15mm. It was found about 4-5 miles to the south-west of the creek site. For reference, here is a post I made about the P. trinodosum specimen that I sent you a picture of in May. I thank you very much for your help in advance. Sincerely, Heteromorph" I have given an alphanumerical designation to each picture for ease of reference. I guess it is probably kinda silly to have so many pictures that this is necessary. If this is stupid, than I extent my apologies to the Mods. I will patiently receive correction. Thank you to everyone in advance. F1 F2 F3 F4
  2. This heteromorphic species is characterized by an open plain spiral shape with rectiradiate ribs and 3 sets of tubercles, 2 sets of ventrolateral tubercles, and 1 set of ventral tubercles. The whorl section is compressed and does not have constrictions in United States specimens but does have constrictions in many European specimens. The distance between ribs is roughly the same as the width of a rib. As far as I know, there are only two species reported for this genus, with the other being Phlycticrioceras rude from the late Santonian of France. (Kennedy 1995). P. trinodosum is the only species reported in Texas. This particular specimen has a rib index of roughly 3 1/2, but some specimens of this species have been known to have a rib index of up to 8. (Emerson 1994). The highest rib index of a P. trinodosum specimen that I have found is 6, although I have one specimen which could be a P. trinodosum specimen that has a rib index of 7. It was broken in two when it separated from the rock shown in the last photo, with its outer whorl being shown in the 4th and 5th photos. The outer whorl is 53mm long, and at the top where the whorl height is measurable, it is 16mm. You can see in the photos of the main part of the specimen, the impression of where its outer whorl once was. The complete specimen would be about 65-70mm in diameter if its outer whorl was still connected. Mine shows a bit of pathology in some places, with two examples being the large gap in between two ribs shown in the 4th and 5th pictures, along with two ribs being very close to each other, which is shown in the 2nd picture. Here are a few references, with the hyperlinked references being underlined. The first 4 references that I have hyperlinked are open access, while the 5th is not open access but can be obtained online without having to request the text from the authors. The 6th reference has to do with the species Phlycticrioceras rude, the only other species in this genus. I have added additional links to sources with information about this paper due to the fact that it is not open access and must be requested. The 7th and 8th references are not open access and are not hyperlinked because I cannot find any way to obtain them online. The last hyperlink is an open access stratigraphic reference for the Austin Chalk and has no information about this genus. When applicable and needed, I have put the relevant pages for information, plates, and text figures at the end of references: Ulrich Kaplan und William James Kennedy (1994). Ammoniten des westfälischen Coniac. Geologie und Paläontologie in Westfalen, Heft 31, 155 S. Pages 53, 54; Tafel 37, Figures 2-4, 9-15 on pages 142, 143; Tafel 43, Figure 3 on pages 154, 155. Zdenek Vašíček (1990). Coniacian ammonites from Štíty in Moravia (Czechoslovakia). Sbornik geologickych ved, Paleontologie 32, Pages 163-195. Pages 177, 179; Plate VI with its explanation is on page 193. Young, K. (1963). Upper Cretaceous Ammonites from the Gulf Coast of the United States. University of Texas, Publication 6304, 373 pp. Pages 45, iv, 39, 47, 371; P. sp. cfr. douvillei on pages 45, iv, 23, 26, 29, 371; Plate 4, figures 2, 3 on pages 150, 151; Plate 11, figure 2 on pages 168, 169; text figure 7 f, h on pages 156, 157. W. J. Kennedy (1984). Systematic Paleontology and Stratigraphic Distribution of the Ammonite Faunas of the French Coniacian. Palaeontological Association, London, Special Papers in Palaeontology, No. 31. Pages 136, 137; Plate 32, figures 4, 11 on pages 140, 141; text figure 42E on pages 146, 147. David L. Clark (1963). The Heteromorph Phlycticrioceras in the Texas Cretaceous. Journal of Paleontology, Vol. 37, No. 2, pp. 429-432. W. J. Kennedy, M. Bilotte and P. Melchior (1995). Ammonite faunas, biostratigraphy and sequence stratigraphy of the Coniacian-Santonian of the Corbieres (NE Pyrenees). Additional links to information concerning this paper can be found here and with the species Phlycticrioceras rude, listed here. Kennedy, W.J. and Cobban (1991). Coniacian Ammonite Faunas from the United States Western Interior. Palaeontological Association, London, Special Papers in Palaeontology, No. 45, 96pp. Barbra L. Emerson, John H. Emerson, Rosemary E. Akers and Thomas J. Akers (1994). Texas Cretaceous Ammonites and Nautiloids. Paleontology Section, Houston Gem and Mineral Society, Texas Paleontology Series Publication No. 5, 438 pp. Pages 285, 286, 388, 422. Ulrich Andrew S. Gale, William James Kennedy, Jackie A. Lees, Maria Rose Petrizzo and Ireneusz Walaszczyk (2007). An integrated study (inoceramid bivalves, ammonites, calcareous nannofossils, planktonic foraminifera, stable carbon isotopes) of the Ten Mile Creek section, Lancaster, Dallas County, north Texas, a candidate Global boundary Stratotype Section and Point for the base of the Santonian Stage. Acta Geologica Polonica, Vol. 57, No. 2, pp. 113-160. The 1st, 2nd, 4th and 8th papers also contain information on the genus Tridenticeras which is found in the Austin Chalk alongside P. trinodosum, just in case anyone is interested in that genus as well. P.S. A big thanks to DPS Ammonite. This is my first post to 'Collections' and he helped me get it all straight.
  3. The Transylvanian area of Romania boasts a rich fossil record of dinosaurs, which lived on an island (Haţeg Island) during the very end of the Cretaceous. Many of these are dwarfed in body size or exhibit other unusual features thought to be linked to their insular habitat. One of the most common of these dinosaurs is the rhabdodontid ornithopod Zalmoxes. This paper takes a look at new specimens found at the Nălaț-Vad locality. A catalog of Zalmoxes (Dinosauria, Ornithopoda) specimens from the Upper Cretaceous Nălaț-Vad locality, Hațeg Basin, Romania. (American Museum novitates, no. 3884) Brusatte, Stephen.; Dumbravă, Mihai.; Vremir, Mátyás.; Csiki-Sava, Zoltán.; Totoianu, Radu.; Norell, Mark. http://digitallibrary.amnh.org/handle/2246/6781
  4. The Rio Puerco Valley

    The Rio Puerco Valley was my introduction to fossils...it immediately caught my attention...lit a match...became a place I am always eager to revisit...search...learn about... ...and in roaming it, have learned about myself. Many of my adventures in the Puerco are posted here, here...here and here...and here. From here on out, my excursions will be shared here. May you find happiness in your hunting. -P.
  5. Fossil Geoduck?

    I found this clam eroding from a concretion in the Carlile Shale (Turonian) outcrops which I hike regularly. After much debate (with myself ) about the i.d. of this clam, I want to label it as panopea sp. (the modern species is referred to as a geoduck) but wanted to post it here to get your thoughts as well. Is this a fossil geoduck? Thanks for pondering, -P.
  6. whose humerus

    went hunting in a small site that normally produces small crow shark teeth and enchodus teeth and pieces of turtle shell and found this bone. not sure what it belonged to.thanks
  7. Late Cretaceous small tetrapods found in Lithuania

    Dear Guys, I made the pictures of possible big discovery in Late Cretaceous erratics of Lithuania. There are some frog bones in flints (ilium, urostyle, tibiofibula, scapula), snake pieces (tibiofibula like of Tetrapodophis! and one thin scale), and toothed birs upper and lower jaw fossils. If you could confirm these finds, it will be the first further my article in scientific magazine and I wish it will be successful. There will be some posts, please review the pictures and tell what do you think. At first, I will show you frog remains. Best Regards Domas The second part- snake remains.
  8. Possible dinosaur remains found in Lithuania

    Dear Guys, I recently found two remains (serrated tooth and scale) of possible small dinosaurs in the Late Cretaceous erratics of South Lithuania, Eastern Europe. The tooth is about 1,2 cm length, scale is 4 mm length. If the remains belong to dinosaurs, which dinosaur fossils it could be? Any opinions are very welcome Best Regards Domas
  9. Unknown Ammonite

    A couple of years ago, while on a romp through the Rio Puerco Valley, I found this ammonite. Since then, I have attempted to find a proper i.d. for this specimen through literature and documentation of New Mexico's Late Cretaceous ammonites. With very little luck, the closest resemblance were ammonites in the subfamily Puzosiinae, which are not documented from New Mexico. Today I decided to show the curator and the ammonite researcher at the New Mexico Museum of Natural History and Science. Good news...they did not know what it was! ...pretty exciting. Anyhoo, I have donated it to be studied but figured I would post it here as well. Unknown ammonite from the Late Cretaceous (Cenomanian) Paguate Mbr. of the Dakota Formation - New Mexico, USA. I doubt they'll be jumping on this right after lunch, but I will let ya'll know the results as I do. Happy hunting, -P.
  10. Chiropractor discovers BC's first dino skull. Looks like a Tyrannosaurid. Pretty good find while on holiday http://www.cbc.ca/amp/1.4158748
  11. Bone Fragment

    I literally joined the forum 5 minutes ago, and I am still learning about the technicalities of paleontology. So if I use terms or vocabulary in the wrong context please excuse me. I have recently acquired a bone fragment that was found in the Hell Creek Formation near Jordan Montana,and it is from the Late cretaceous period. This is all I currently know about this fossil. I need help identifying the species that this bone fragment is from. Thanks for the help !
  12. Sauropod tooth from Hungary

    A new paper is available that will shed new light on Late Cretaceous titanosauriform evolution in Laurasia: http://www.nature.com/articles/s41598-017-03602-2#Sec4 The titanosaur fauna from Late Cretaceous Europe has been well documented in the literature over the generations, but the discovery of a basal titanosauriform tooth in Santonian-age sediments in Hungary is important because it fills a gap in the fossil record of post-Cenomanian, pre-late Campanian European titanosauriforms and suggests that Late Cretaceous non-titanosaur somphospondylians may have been more widespread in Laurasia than previously thought because the discovery of sauropod remains from the Bissekty Formation of Uzbekistan shows that some latest Cretaceous European titanosaurs may have evolved from a central Asian ancestor.
  13. Zuul crurivastator David Evans of the ROM contributed in describing a new ankylosaur from northern Montana's Judith River Fornatikn. One of the most complete Ankylosaurs ever found ROM's release http://www.rom.on.ca/en/collections-research/research-community-projects/zuul http://blogs.discovermagazine.com/deadthings/2017/05/09/meet-zuul-crurivastator-i-aint-fraid-of-no-ankylosaur/#.WRJrc5BlDxA http://www.sciencemag.org/news/2017/05/demon-faced-dinosaur-named-after-ghostbusters-baddie
  14. Back in September I posted My Jurassic Park - Theropod Claws from the Kem Kem, the link is attached and now this topic is its continuation. There is more to the Kem Kem than just Theropod Claws (my passion) and I would like to share that with you. The Kem Kem beds consists of three formation: Ifezouane, Aoufous and Akrabou and most of the Dinosaur material comes from there but not all and I'll share a few examples of that. The Kem Kem beds are not a large area in Morocco and I've attached a map to give everyone a good understanding of that and where they are geographically. The best fossils come near the border with Algeria but most of these collecting areas are depleted and today diggers are going to more remote areas. The Kem Kem Region Lets begin with my favorite Spinosaurus aegypticacus (sp.) The teeth can be massive and here are a few examples
  15. Denticle

    Sorry, it's blurry. Hopefully identifiable. It is 3/4" x 1/2". From a late Cretaceous site. Shark or Ray?
  16. Placement of terrestrial formations in the late cretaceous of North America as been constantly evolving and in October 2016 Denver Fowler a Paleontologist at the Museum of the Rockies published a very extensive paper on the subject and updated most units. This is very important when it comes to understanding dinosaur evolution and aids in describing species. This paper is in the process of going through peer review so is subject to change. Fowler DW. (2016) A new correlation of the Cretaceous formations of the Western Interior of the United States, I: Santonian-Maastrichtian formations and dinosaur biostratigraphy. PeerJ Preprints 4:e2554v1https://doi.org/10.7287/peerj.preprints.2554v1 The paper is pretty technical but all of the data is found in this excel file (supplemental information) which is a massive high-resolution stratigraphic chart for all of the formations from the late cretaceous of North America. It's nice to see it all laid out and a great reference source. https://doi.org/10.7287/peerj.preprints.2554v1/supp-1 To make it easy I've broken the chart apart so you can easily see most important dinosaur formations Texas The biggest change came with our understanding the Aguja and Javelina Formations of Texas part of the Tornillo group. The study indicated that the Aguja Formation deposits are only Campanian in age and that the Javelina Formation does not extend into the end of the Cretaceous. Very important when trying to describe species in those formations. Sellers have been comparing the Aguja to the Judith River in Montana well there is a correlation but its deposits are much younger that JR. Eastern Montana, N. Dakota, S. Dakota and Wyoming What I found interesting is that the Hell Creek is much older in Montana than in the adjacent states. The other interesting observation that can been easily be seen on these charts is that the how short a time frame the deposits of the Hell Creek/Lance formation are compared to the other major dinosaur formations. Central Montana Two Medicine and Judith River Formations are the two key formations in this locality Utah and New Mexico Utah depicted on the left and NM on the right Head North to Canada Alberta and Saskatchewan
  17. Lance Formation Micro Tooth

    I have some Lance formation matrix I purchased on that auction site and I have been slowly breaking it down. This is one of my finds. I don't have a scale small enough to measure it against so . . . It is a little smaller than the head of a pin, flea speck. I did a Google image search on Lance Formation micro teeth but came up with nothing. The photos were taken with my Nikon point an shoot through the eyepiece of my microscope. These photos are the best I can do.
  18. Hey all, Had the honor of being taken fossil hunting with Pfooley recently. Found my first ammonites! I'd been wanting to find some for a long time. Was a great experience and I look forward to more trips soon. Checked out the famous "Windmill Site" first. The drive there was amazing in early morning. I busted open my first nodules... Poor quality picture of the Windmill Site finds. Nice variety in there. Far left is a large bivalve and there's a large gastropod on the far right. We moved on to find some other ammonites. My best find of the day was this large whole Spathites. Had a blast and can't stop thinking about the next time I'll find myself out there... Thanks again Mike!
  19. Richardoestesia isosceles?

    Is this a tooth of Richardoestesia isosceles? Scale marks on left side of tooth are in mm and on the right side are in 0.5 mm increments. Serration count ranges from about 6 to 8 per mm. What remains of the tooth is approximately 11 mm in length. Hell Creek Formation (Late Cretaceous: Maastrichtian), South Dakota.
  20. Small Vertebra (Hell Creek)

    Any help on the identity and position of this small (scale bar = 1 mm) vertebra from the Hell Creek Formation (Late Cretaceous) of S. Dakota, would be greatly appreciated. It looks like much of the neural arch and processes are gone. The centrum is a bit more dorso-ventrally flattened as compared to the turtle vertebra I posted the other day, and the ventral side (?) of the centrum has sinuses unlike the turtle vert (perhaps due to wear / breakage?).
  21. Hi All, I am hoping someone might recognize this bone fragment. It is from the Hell Creek Formation (Late-Cretaceous) of South Dakota. It looks fishy to me but does not have the exterior texture of gar skull. The exterior is really "pocked", almost like small, conchoidal chips. If fish, maybe bowfin, paddlefish, or sturgeon skull fragment? Only other thought I had was maybe crocodilian or champsosaur skull fragment, but I am leaning fish. There might be enough structure on the interior surface for someone to recognize which bone. Top photo is the exterior surface, middle is interior surface, and bottom photo is close-up (under magnification) of the exterior surface. Scale is in cm / mm. Thanks for any help.
  22. Hell Creek "Herptile"

    Could someone help me with the identification and position of this vertebra. I was thinking it was procoelous and maybe crocodylomorph? Scale bar = 1mm.
  23. Hell Creek Mammal

    Sorry for the barrage of Hell Creek posts, I finally have time to go through some of my summer collections. I am having a hard time with this mammal tooth (Hell Creek Formation, Late-Cretaceous, South Dakota). The occlusal surface is heavily worn. I was thinking perhaps Cimolodon? or Mesodma? Any help / suggestions would be greatly appreciated. Scale bar = 1 mm
  24. Hell Creek Leaf

    Hi all, This is a leaf from the Hell Creek Formation (Late-Cretaceous: Maastrichtian) of South Dakota. My best guess is Marmarthia sp. (Lauraceae). Maybe M. trivialis? Can anyone familiar with the Hell Creek Flora confirm or perhaps suggest alternatives?
  25. I found this near Cottonmouth creek, 8 miles south of Austin. Some material throughout the creek looks to be lithified beach sediment. The extinct volcano called " Pilot Knob" is said to have erupted roughly 80 million years ago. The rock is about 2.5" inches long.