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Showing results for tags 'pelycosaur'.
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Here’s a pelycosaur appendicular bone I acquired from a vendor well-acquainted with Permian material a while back. It was sold to me only as Dimetrodon limbatus from the Archer City Formation in Texas. Thing is, I’ve never been able to place exactly what bone it is, and it doesn’t seem to match any appendicular elements of Dimetrodon which I could find references for. Here’s to the hope that there’s somebody here well-acquainted with this material who can put me on the right track!
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Identification: This tooth was found in processed microfossil matrix from Waurika, OK, USA. Reptile remains in general are very uncommon, so if you think you've found many pieces of Dimetrodon teeth, you're likely mistaking many Orthacanth shark cusps. Orthacanth shark enamel is smooth, and the serrations are quite prominent compared to those on Dimetrodon which are finer. Dimetrodon enamel is not smooth, as seen on this one. Dimetrodon crowns are also broader. Shark cusps broken at the foot of the crown also flare out, where reptile teeth do not. Were this crown complete, you would also notice a conical/round depression in the base. This is unlikely to be from another Sphenacodontid based on the locality, presence of serrations, and enamel ornamentation. https://www.nature.com/articles/ncomms4269 Notes: This tooth is a post-canine/posterior tooth, which is the tooth position one is more likely to find in micromatrix since they are smaller.
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I got these material from one seller. The information that I have is these all come from Oklahoma, USA. I have separate and glue some. I put them in 2 group that which have spike and which doesn’t have. It very pleasure that you could help me to ID them! Thanks! First group Second group
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From the album: Permian
Dimetrodon sp. Wellington/Ryan Fm., Waurika, OK, USA Post-canine/posterior tooth This tooth is likely from D. limbatus, given the locality and presence of serrations: https://www.nature.com/articles/ncomms4269 The same paper also rules out other serrated Sphenacodonts by the enamel ornamentation. Its smaller size could indicate that it's from a juvenile. It differs from the comparatively abundant broken Orthacanth shark tooth cusps in the microfossil matrix (what most people are likely to confuse with): the enamel texture is not smooth, the crown is very broad (indicating it's likely a posterior, in addition to its size), it has fine serrations that differ in shape from the sharks', and the base doesn't flare out. Were this crown complete, you'd also notice a conical/rounded depression in the base. A beautiful tooth from one of our surprisingly close cousins.-
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From the album: Permian era fossils
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From the album: Permian era fossils
Basioccipital about .5" large vertebra about 3" small vertebra about 1.5" *more info to be posted-
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From the album: Permian era fossils
Very small fragments of dimetrodons sail spines. From the lower Permian Texas Red Beds, Archer city formation in Archer county-
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Edaphosaurus bone with large bite mark from an apparent Dimetrodon
Still_human posted a gallery image in Member Collections
From the album: Permian era fossils
Reverse side of the unidentified Edaphosaurus pogonias bone with an apparent Dimetrodon tooth hole. -
From the album: Permian era fossils
Yet unidentified Edaphosaurus pogonias bone from the Permian era Red Beds site in North Texas, with large unhealed tooth hole from what appears to be a large Dimetrodon's bite, from either the fatal attack, or post-death predation mark.- 14 comments
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