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Found 41 results

  1. Ammonite ID? Perisphinctes?

    Hi there guys, I got this ammonite as part of a set from Madagascar. I would like to know if this is a Perisphinctes. What caught my attention is that it seems to be more "larger" than the regular Perisphinctes I'm used to, at least. Let me know your thoughts.
  2. Nautiloid Siphunculus?

    Hi there folks, Just need to know if I'm seeing this right. This is a piece from Madagascar I recently received. At first I didn't give much attention to it, but today i noticed the three small markings on the center of the piece. My question is: Would that be the reminiscent of the siphunculus of a Nautiloid specimen? Piece is from Madagascar. Thanks in advance, Juliano
  3. What is this ammonoid

    Here’s something I found in Michigan, it’s an ammonoid of some type but I thought it was too wide to be a goniatite, I could be wrong though.
  4. Fossil IDs (if possible)

    I like collecting fossils, but I usually am not sure what my finds are. Please, could you help me identify these fossils? I noted down some possibilities down below. 1 - could be a late Albian ammonite from central Serbia, but I am not entirely sure. Acquired in Serbia. 2 - Found at Southerndown, Wales. Could it be a tree root or something in the region of that? It has a cross-hatched pattern if you look closely. 3 & 4 - A shell I found at Penarth, Wales but I am not entirely sure what it is called. 5 - A bone I found in the mud at Tites Point, Severn, Gloucestershire. maybe a birds? 6 - Some shells I found in mudstone at Charmouth, England. Was found in the same stone as 7. 7 - wood I found at Charmouth? It was very crumbly and delicate. 8 - A Trilobite fragment possibly, Llanfawr quarries, Wales. 9 - A bivalve I found in Southerndown. Not sure what it is though.
  5. Ammonoids from Carniol

    Hi everyone, Should've posted these a LOOONG time ago, but me being the lazy guy I am I forgot to do so till now Anyways, here goes. These were all found by me (/my family) in the Carniol clay banks in southeastern France. They are (heavily for some) pyritized. They are from the "Gargasian", Aptian stage, Cretaceous. Would love to hear the species name of them. Genus is still fantastic. Thoughts? Thanks in advance, Max #1:
  6. Small ammonoid from Jordan

    I found this on the surface of the land next to my house. when you expose it to the sun, you can see crystals reflecting light
  7. Hello there! I visited @Malcolmt yesterday and he was nice enough to clean up some of my stuff from Penn Dixie (mid-Devonian), including the specimen below. I'm not exactly sure what it is, so I was hoping that someone out there will be able to help me with identifying this little guy, which I think is either a gastropod or a ammonoid - what do you think? These are all pictures of the same specimen, just from different angles. And it's pretty small - only 5mm across at its widest point. Maybe @DevonianDigger can help? Thanks for your help! Monica PS - We found a definite gastropod - a Platyceras of some sort - just barely exposed on the side of one rock, but it's kind of twisted and weird-looking, so Malcolm is going to work on it a bit more - after it's done, I'll post pictures of that little guy, too.
  8. Discotropites sp.

    From the album alpine triassic Ammonoids

    Discotropites sp. from Triassic/upper Carnian "Hallstatt" limestone. Zone of Tropites subbullatus/Tuvalian II.
  9. Timor Ammonoid 1.JPG

    From the album MY FOSSIL Collection - Dpaul7

    Ammonoid SITE LOCATION: Timor Permian (298.9-251.902 million years ago) Ammonoids are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out during the Cretaceous–Paleogene extinction event. Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Subclass: †Ammonoidea
  10. Timor Ammonoid 1.JPG

    From the album MY FOSSIL Collection - Dpaul7

    Ammonoid SITE LOCATION: Timor Permian (298.9-251.902 million years ago) Ammonoids are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out during the Cretaceous–Paleogene extinction event. Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Subclass: †Ammonoidea
  11. Timor Ammonoid 1.JPG

    From the album MY FOSSIL Collection - Dpaul7

    Ammonoid SITE LOCATION: Timor Permian (298.9-251.902 million years ago) Ammonoids are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out during the Cretaceous–Paleogene extinction event. Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Subclass: †Ammonoidea
  12. Timor Ammonoid 1.JPG

    From the album MY FOSSIL Collection - Dpaul7

    Ammonoid SITE LOCATION: Timor Permian (298.9-251.902 million years ago) Ammonoids are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs are more closely related to living coleoids (i.e., octopuses, squid, and cuttlefish) than they are to shelled nautiloids such as the living Nautilus species. The earliest ammonites appear during the Devonian, and the last species died out during the Cretaceous–Paleogene extinction event. Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Subclass: †Ammonoidea
  13. Three Ordovician Uncertainties

    I have a hunch about these, but I felt it best to get some more seasoned input. The first two are trilobite partials. I'm tempted to call the one on the right just another small Isotelus, but the segmentation doesn't appear quite right. Found in the Lindsay Fm. The second image is a matter of dispute (or so I was told) with one expert stating it is an ammonoid, and another stating it is a gastropod. Found in the Whitby shale. About 5 cm in diameter.
  14. Goniatites Ammonite a.jpg

    From the album MY FOSSIL Collection - Dpaul7

    Goniatites Fossil SITE LOCATION: Morocco TIME PERIOD: Middle Devonian to Permian - (390-139 million years ago) Data: Goniatids, informally Goniatites, are ammonoid cephalopods that form the Order Goniatiida, derived from the more primitive Anarcestida during the Middle Devonian some 390 million years ago. Goniatites (goniatitida) survived the Late Devonian extinction to flourish during the Carboniferous and Permian only to become extinct at the end of the Permian some 139 million years later. All goniatites possessed an external shell, which is divided internally into chambers filled with gas giving it Buoyancy during the life of the animal. An open chamber at the front of the shell provided living space for the goniatitid animal, with access to open water through an aperture. The general morphology and habit of goniatites was probably similar to that of their later relatives the ammonites, being free swimming and possessing a head with two well developed eyes and arms (or tentacles). Goniatites is a genus of extinct cephalopods belonging to the family Goniatitidae, included in the superfamily Goniatitaceae. Beyrichoceras and Cravenoceras are among related genera. Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Order: †Ammonoidea Family: †Goniatitida Genus: †Goniatites
  15. Goniatites Ammonite a.jpg

    From the album MY FOSSIL Collection - Dpaul7

    Goniatites Fossil SITE LOCATION: Morocco TIME PERIOD: Middle Devonian to Permian - (390-139 million years ago) Data: Goniatids, informally Goniatites, are ammonoid cephalopods that form the Order Goniatiida, derived from the more primitive Anarcestida during the Middle Devonian some 390 million years ago. Goniatites (goniatitida) survived the Late Devonian extinction to flourish during the Carboniferous and Permian only to become extinct at the end of the Permian some 139 million years later. All goniatites possessed an external shell, which is divided internally into chambers filled with gas giving it Buoyancy during the life of the animal. An open chamber at the front of the shell provided living space for the goniatitid animal, with access to open water through an aperture. The general morphology and habit of goniatites was probably similar to that of their later relatives the ammonites, being free swimming and possessing a head with two well developed eyes and arms (or tentacles). Goniatites is a genus of extinct cephalopods belonging to the family Goniatitidae, included in the superfamily Goniatitaceae. Beyrichoceras and Cravenoceras are among related genera. Kingdom: Animalia Phylum: Mollusca Class: Cephalopoda Order: †Ammonoidea Family: †Goniatitida Genus: †Goniatites
  16. I have wanted this book for a while...slowly piecing it together. All links are to downloadable pdfs. Enjoy. Front Matter Part I Conch 1 Describing Ammonoid Conchs ..... Christian Klug, Dieter Korn, Neil H. Landman, Kazushige Tanabe, Kenneth De Baets and Carole Naglik 2 Ammonoid Color Patterns ..... Royal H. Mapes and Neal L. Larson 3 Ammonoid Septa and Sutures ..... Christian Klug and René Hoffmann 4 Cameral Membranes, Pseudosutures, and Other Soft Tissue Imprints in Ammonoid Shells ..... Kristin Polizzotto, Neil H. Landman and Christian Klug Part II Ontogeny 5 Ammonoid Embryonic Development ..... Kenneth De Baets, Neil H. Landman and Kazushige Tanabe 6 Theoretical Modelling of the Molluscan Shell: What has been Learned From the Comparison Among Molluscan Taxa? ..... Séverine Urdy 7 Mature Modifications and Sexual Dimorphism ..... Christian Klug, Michał Zatoń, Horacio Parent, Bernhard Hostettler and Amane Tajika 8 Ammonoid Shell Microstructure ..... Cyprian Kulicki, Kazushige Tanabe, Neil H. Landman and Andrzej Kaim 9 Ammonoid Intraspecific Variability ...... Kenneth De Baets, Didier Bert, René Hoffmann, Claude Monnet, Margaret M. Yacobucci and Christian Klug Part III Anatomy 10 Ammonoid Buccal Mass and Jaw Apparatus ..... Kazushige Tanabe, Isabelle Kruta and Neil H. Landman 11 Ammonoid Radula ..... Isabelle Kruta, Neil H. Landman and Kazushige Tanabe 12 Soft Part Anatomy of Ammonoids: Reconstructing the Animal Based on Exceptionally Preserved Specimens and Actualistic Comparisons ..... Christian Klug and Jens Lehmann 13 Soft-Part Anatomy of the Siphuncle in Ammonoids ..... Kazushige Tanabe, Takenori Sasaki and Royal H. Mapes 14 The Body Chamber Length Variations and Muscle and Mantle Attachments in Ammonoids ..... Larisa A. Doguzhaeva and Royal H. Mapes 15 The Additional External Shell Layers Indicative of “Endocochleate Experiments” in Some Ammonoids ..... Larisa A. Doguzhaeva and Harry Mutvei Part IV Habit and Habitats 16 Ammonoid Buoyancy ..... René Hoffmann, Robert Lemanis, Carole Naglik and Christian Klug 17 Ammonoid Locomotion ..... Carole Naglik, Amane Tajika, John Chamberlain and Christian Klug 18 Ammonoid Habitats and Life History ..... Alexander Lukeneder 19 Isotope Signature of Ammonoid Shells ..... Kazuyoshi Moriya 20 Parasites of Ammonoids ..... Kenneth De Baets, Helmut Keupp and Christian Klug 21 Ammonoid Paleopathology ..... René Hoffmann and Helmut Keupp Index
  17. Monophyllites simonyi (HAUER)

    From the album alpine triassic Ammonoids

    Monophyllites simonyi (HAUER) from the Hallstatt limestone of Austria. Size is 8 cm. Found in the upper part of the austriacum zone.
  18. Trachyceras cf. hekubae MOJS.

    From the album alpine triassic Ammonoids

    Trachyceras cf. hekubae MOJS. from Triassic/Carnian/Austriacum Zone, Hallstatt limestone of Austria. Diameter is about 9cm. Below is a fragment of Neoprotrachyceras thous (DITTMAR). This ammonoid and the orange colour of the rock indicates the austriacum zone.
  19. Sirenites sp.

    From the album alpine triassic Ammonoids

    Sirenites sp. from the Triassic/Carnian, upper aonoides zone. Hallstatt limestone of Austria. Size is about 6cm. Good to see on this specimen is the characteristic feature of Sirenites s. s. that each single rib ends in two venter nodes.
  20. Cephalopod Help

    I have an ammonite(?) that I received circa 1990 from a missionary who said that it was "brought down from the mountains by monks" in Papua New Guinea. Apparently, there is relatively little known about the palaeontology of the area. There are similar ammonites showing up in native tribal art pendants (see article in "Deposits Magazine" HERE The article indicates that it is not known whether these ammonites that are showing up are recently imported or of local origin. I suppose mine could have been imported, but given the date of acquisition and what I was told, I am inclined to think it was collected in situ in Papua New Guinea, but I can't be certain. The geologic map I found did not distinguish between periods in the Mesozoic, so I don't know if it is Cretaceous or Jurassic, etc. I did find 2 papers (Both available as .pdf online): Tatsuro, M & S.K. Skwarko. 1991. Ammonites of the Cretaceous Ieru Formation, western Papua New Guinea. J. Australian Geology & Geophysics 12(3): 245-262 Tatsuro, M & S.K. Skwarko. 1993. Cretaceous ammonites from south-central Papua New Guinea. J. Australian Geology & Geophysics 14(4): 411 - 433. The closest resemblance of the taxa in those papers was Subthurmannia (Fauriella) boissieri. In doing my own searching, I thought Macrocephalites bifurcatus (middle Jurassic) looked like a good match and has been collected in Papua (see link to museum specimen HERE). The preservation of that specimen appears to match mine, too. Here are some pics of my specimen. Any help from the ammonite enthusiasts would be greatly appreciated! @Ludwigia
  21. Deb and me just got in from a good six hour search for Greenops, carving out and extending benches. Did we find full ones? Well, yes and no. As those familiar with the area know all too well, finding a full Greenops is not easy. Apart from a zillion moulted pieces, their notorious delicate flakiness, and sometimes the frustration with the matrix itself, full ones - when they appear - rarely come out nice and pristine without some damage. I haven't been as much of a Greenops whisperer this year, but some pics of finds... First up are the heartbreakers - stuff that had the potential to be full, but for one reason or another wasn't. Next is a cluster of more heartbreakers, but there are two "full" ones in there, but with considerable damage on one and distortion on the other. The others in that group may prep out full, but they already display considerable damage. I don't usually find crinoid stems this far up in the Widder shale. This stem actually continues on the other side. Some very delicate prep, and I'm hoping I might find a surprise at the end of that stem. My rule about this orthocone nautiloids is, if it is intact, wrap it up and put it in the bucket. This might actually come free of the matrix.
  22. What's the best way to preserve the fragile nacre on baculites?
  23. Hello, folks! I'm one of those guys that finds fossils fascinating, and loves the natural history museums, but has never really tried to find fossils. I bought a one-inch fish fossil in a museum gift shop many years ago, for a few bucks, and for along time, that comprised my fossil collection. One day, my collection grew 100% when I realized one of the random rocks bordering a garden at the house I was renting had a pretty large fossil apparent in it. I took that stone, and have had it on my mantle for years. I always wondered what it was, and finally I stumbled on this site and decided to see if the good folks here can help me settle once and for all what it is. I have a good guess, but we'll get to that. I read some ID threads and the posting guidelines, and I realize that I've already made one mistake, in not including a scale inthe pictures. Oh well, hopefully my descriptions of size will suffice. Also, my cheap little camera struggles with focus and lighting on macro pics, and I'm no photographer. But it's a pretty large fossil so hopefully you can see what it is. I'd be super stoked to have my suspicions confirmed, or destroyed, either way, as long as I find out what it is and can match it to a picture of something pretty similar. Speaking of that, I have looked at fossil ID charts and at pics, and while I can't find anything that matches it exactly, I feel like I'm close. In any case, here are the pics and then I'll say what I think it is so you can all laugh at the guesses of a Rock Noob. As mentioned before, it was found in a backyard in Oklahoma City, but I suspect it was not native, and was carried there somehow. It does resemble rocks I've seen near just about every beach I've ever been to, especially on the Gulf of Mexico. I'm thinking it's just some sort of sedimentary limestone. The fossil itself is about one inch across the round cross section you can see at the left end. It appears to be the broken end of a long, cone shaped "shell" of some sort. The shell continues into the rock for about 4 inches, and I can't see that it comes out the other side, but I get the impression it was longer at some point. My observation of the segments that make up the object, and the suggestion of a spiral-chambered structure I can sort of see inside the broken end, lead me to believe it was some sort of straight-cone-shelled ammonoid creature. My feeble web research indicates that there were such creatures, many types, in fact. I've found many drawings and pics that are close, but not dead-on enough for me to close the case. My official guess is that my fossil came from something approximately like this: But, hey, I'm no expert on ammonoid or nautiloid taxonomy, so I leave it to you, good experts! The Photographs: (poor as they are) Main view, you can see into this broken end and in person, sort of see how it looks as if it had spiral chambers inside. The pronounced longitudinal ridges or scores are very evident. There is a slight curve to the fossil but it is broken in some places and I think it was originally fairly straight. It has a regular gentle taper towards the end that disappears into the rock. What I believe were originally open spaces in the "shell" have filled with some sort of crystal that grew there. Another view of this end. The whole rock is about 8 inches in length, perhaps 5 inches fron to back, a few inches thick. The fossil is clearly separated from the rock, it looks like I could tap the rock with a hammer and the fossil would just fall out. I don't plan to try that, however. You can see there is a hole or crack about one inch from the leftmost extremity. You can see inside and see the crystalization that has taken place in there. More importantly, toward the upper left of that crack, you can see that the outer surface of the object has broken away. This reveals that each of those "cells" apparent on the outside are hollow inside- the object is in fact a stack or a spiral arrangement of many, many, little chambers. You can see more open cells on the center-right area as well, and these have filled in. This strongly suggests an ammonoid or nautiloid mollusc to me. It appears that the transverse chevrons, along with the longitudinal scores are actually the divisions between tighly packed shell chambers or sections. The chevrons divisions appear in annular rings or a spiral around the object, at regular intervals all along it's length, on every part I can see. These scores and chevrons look very much like the sutures evident in other shells, but I have yet to find a picture that matches closely. Moving to the right, this chip came off without effort, basically just fell off (long ago.) you can see the imprint of the object, along with a very clear imprint of some scallop-like bivavle mollusc. I'm already convinced it's a sea creature, but this bivalve further indicates where this came from. My object disappears into the rock behind that bivalve imprint. I feel I could dig more of it out, but I would rather leave the rock as-is. Closer shot of that area. The shell itself is gone but it left a perfect, detailed imprint of the little scallop. Numerous other small shells are evident, as with all this type of rock. From reading the ID advice I realize that a "hand shot" isn't the best indicator of size, but I promise, to the best of my knowledge, that my hand size is as average as it comes. There are other things hiding in here, it hard to see but this area seems to have something going on underneath it. Hopefully htis is enough for someone to recognize my mystery "shell." I won't be surprised if some one can say that "this is a very common ________ from ________ where they dig them out by the ton in ________limestone quarry." But you never know, this might end up being the find of the century! (I won't hold my breath. . .) Thanks for looking! I also have two rock samples, one of which may be petrified wood. Is there a similar "Rock ID thread" I can post them in? -Brian
  24. I was told that these were from Morocco, but am not able to match them up with anything from there. It seems to not be calcite, but quartz in it. Grid is 0.25 inch scale. Any help will be greatly appreciated! As far as I can tell, they are real (not fake)... -Bill
  25. Dear all, As of late I have been in discussion with a researcher from the Ammonoid Palaeobiology Lab at the University of Bath in England (https://aplbath.wordpress.com/projects/). The researcher is interested in using Ammonoids/Ammonites from the Norian through to Hettangian for conducting a study. He is specifically interested in using specimens from private collections to augment his research (which delights me, because I am all for amateur-academic collaboration!). I think this would be an excellent opportunity to demonstrate the usefulness of private collections. I am going to donate some specimens for research, and it would be great if other collectors could assist me as I don't have many specimens. YOU DO NOT have to donate the specimens; you can lend them (depending on if they are suitable specimens). If you have any questions, or specimens you are interested in loaning or donating I would love to hear from you and we can discuss it further. I should mention if costs (i.e. shipping) are an issue I assure you we can get around this without you being out of pocket. Please let me know if you have any questions. Best wishes, Joe
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