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Found 211 results

  1. I was going through a large group of very small Triassic coprolites today and came upon this. Since there was a beat up Koskinonodon tooth in with the coprolites, I'm wondering if this could be a jaw or maxillary fragment from a juvenile. The person who found the coprolites said that he found a lot of Koskinonodon teeth in the area as well some from Phytosaur, Apachesaurus, Coelophysis, Postosuchus, and Revueltosaurus. What do you all think? Jaw or maxillary? Amphibian, fish or something else? If this is amphibian, can anyone identify the bone above and to the left of the teeth? My cat votes amphibian @Carl check it out!
  2. My first prep: unknown rhaetian tooth

    I was sent a chunk of material from the aust bone bed of the U.K. by @JohnBrewer (thank you very much!) to practice some prep on, mostly for the large bone and coprolites. I was also told to soak the material in vinegar to get all the little microfossils. I've gotten started by breaking off some chunks (I haven't gotten the acetone for my consolidant yet so I'm not touching the bone just yet) and soaking them in concentrated vinegar (30% acetic acid I believe, strong stuff). After an initial soak I saw this little guy poking out the surface. I saw the opportunity to prep and got right to work (being the forgetful procrastinator I am, I haven't bought a new scribe yet so for the first half I used a blunt dental instrument, the next fourth using a sowing needle, and the last with the needle duct taped to a piece of metal). Here are some pictures of the prepping process. I at first got excited thinking it was a plesiosaur, but I doubt that because of its size (6mm). It's hollow, and has striations similar to the carinae of a crocodile (don't think they have those there). Severnicthys is one possibility I stumbled upon. Opinions are welcomed and encouraged!
  3. Phytosaur

    From the album Dinosaurs and Reptiles

    Machaeroprosopus=Pseudopalatus? Bull Canyon FM, New Mexico
  4. This osteoderm was in a box of Bull Canyon Formation (Triassic - Norian) coprolites that I have been going through for the past year. The fun thing is, I one of the coprolites in this batch appears to have osteoderm inclusions that look very similar. I have looked at well over a thousand coprolites from this formation, and this is the first time I have found inclusions such as these. Needless to say, I am super, super excited!!!! Best I can figure it is from an aetosaur or phytosaur, neither of which are familiar to me. I did send an email to the person that found them to see if she is able to identify it, but thought I would throw it out to the forum at the same time. Any assistance you provide would be greatly appreciated. @Carl check it out!
  5. Triassic footprint fossil?

    Hi It is footprint fossil? Age:Triassic Location:Poland Size: near 3 mm
  6. nothasaurus rib bone piece?

    Hi Is this nothasaurus rib bone piece?
  7. Triassic fossil Fish scale

    Hi It is fossil scale? Location: Poland Age : Triassic Size: 1, 3-4 mm 2.3-4 mm
  8. From the album Vertebrates

    Icarealcyon malagasium Beltan, 1984 Early Triassic Dienerian Sakamena Formation Ambilobe Madagascar
  9. Fossil fossil fossil

    Hi Is this : 1 and 2 and 3. Fossil wood? 4.Footprint ? 5.Track? 6.Track? 7.Track?
  10. footprint fossil?

    Hi Is this footprint fossil?
  11. fossil footprint?

    Hi Is this footprint?
  12. Footprint fossil?

    Hi Is this footprint fossil?
  13. New Keichousaurus

    My new Keichousaurus, a half grown one to go with my baby one. Thanks for the advice, everyone who helped me with this purchase! The bones are 3d, it's not a bad prep job I think.
  14. In his 1933 paper, White described two new Pteroniscoids from Madagascar: Pteronisculus cicatrosus , which is rather common and the somewhat rarer Pteronisculus macropterus. According to White, P. macropterus is characterized by an "elongate-fusiform body; maximum depth rather less than length of head with opercular apparatus, and equal to one-quarter total length to base of caudal fin. length of pectoral fin exceeding distance between tip of snout and hinder margin of maxilla. Origin of dorsal fin above fortieth scale-row from pectoral girdle approximately. Scales in more than seventy vertical rows to base of caudal fin, and ornamented with oblique rugae only." Lit.: White, E. I. (1933): New Triassic palaeoniscids from Madagascar. Ann. a. Mag. Nat. Hist.(10) 11: 118-128; London
  15. Mixosaurus panxianensis Jiang et al., 2006

    From the album Vertebrates

    Mixosaurus panxianensis Jiang et al., 2006 Middle Triassic Panxian Guizhou PR China
  16. From the album Triassic

    Diplurus newarki (coelacanth missing some fins) Upper Triassic Lockatong Formation Newark Supergroup Granton site North Bergen, N.J. Prepared with great effort and skill by Kris (Psychodus04) Than you.
  17. Lit.: Tintori, A. et al. (2010): A NEW BASAL NEOPTERYGIAN FROM THE MIDDLE TRIASSIC OF LUOPING COUNTY (SOUTH CHINA). Rivista Italiana di Paleontologia Stratigrafia 2010, Vol. 116, No. 2, pp 162-171. Tan, K. und Jin, F. (2013): Re-study on Gymnoichthys inopinatus from Middle Triassic of Luoping, Yunnan, China. Vertebrata Palasiatica 2013, pp 1-8.
  18. Fish or reptile skull in matrix?

    Hi Is it Fish or reptile skull? Location:Poland Age: Middle Triassic?
  19. Nothasaurus vertebra?

    Hi It is nothosaurus vetebra ? Location:Poland Age :Middle Triassic?
  20. Lit.: Wade, Robert Thompson & British Museum (Natural History) (1935). The Triassic fishes of Brookvale, New South Wales. British Museum, London Whitehouse, J.: Beacon Hill shale quarry, Sydney, New South Wales, Australia: Geologic insights into its strikingly preserved Triassic fossil assemblage
  21. Rauisuchians are some of my favorite prehistoric beasts, rather specific but I'm wondering if anyone on here on the forum has any material to show I'd love to see. So far I've been only able to obtain postosuchus teeth and recently begrudgingly missed out on some Batrachotomus kupferzellensis.
  22. Baby Keichousaurus, ventral view. Functional Morphology and ontogeny of Keichousaurus hui Reptilia Sauropterygia.pdf
  23. Australosomus merlei Piveteau, 1934

    From the album Vertebrates

    Australosomus merlei Piveteau, 1934 Lower Triassic Dienerian Sakamena Formation Ambilobe Madagascar Small to medium size fish (~ 10 to 15cm / 4 to 6"), fusiform body, relatively small head with a slightly rounded snout. Its dorsal fin is located in the posterior fourth of the body. Caudal fin divided with wide lobes. Scales on the flanks are noticeably stalk-shaped.
  24. From the album Vertebrates

    Paracentrophorus madagascariensis Piveteau, 1940 together with scavenging conchostraca (possibly Euestheria truempyi Kozur Seidel, 1982) Lower Triassic Olenekian Ambilobe Madagascar Length 8cm / 3" Small fish (up to 15cm / 6") with a rounded body, somewhat thickset appearance. Dorsal fin attached to the posterior half of the body. Pectoral and anal fin relatively large. Anal fin starts behind end of dorsal fin in close proximity to caudal fin. Caudal fin moderately divided. Eyes remarkably large. Paracentrophorus can be easily mixed up with Parasemionotus Lit.: Piveteau, J. (1940): Paléontologie de Madagascar XXIV Nouvelles recherches sur les poisson du Trias inférieur. Ann. Paleont., 28: 69-88
  25. this summer vacation i spend a day fossil hunting at lyme regis i found some ammonites and bellemnites but also 2 big pieces of rock and i'm going to prepare them for a school project the rock formation was blue lias can i have any advice for cleaning the fossils?
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