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I found this molar in a south Texas gravel bar. Pretty sure it's equus since there's no isolated protocone (although there is a tiny pebble stuck right in the join, haha). I just noticed that it's a bit smaller than all my other equus teeth, and the pattern seems simpler. I looked through "Fossil Vertebrates of Florida" and couldn't quite make a match with either equus or pre equus examples. MSCH from root to parastyle: ~65mm APL length of crown enamel: 24 mm TRW width of crown from mesostyle to posterior protocone: 25mm. First pics are the tooth, then a couple of comparison pictures with an equus.
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I found this small lower tooth from a horse a couple weeks back on the Brazos River. Initially, I wrote it off as just another Equus sp. since horse teeth are probably the most common fossil in the Beaumont formation that I hunt in next to turtle shell fragments, but after looking at it again yesterday and comparing it to pictures in Hulbert's book on Floridian fossil vertebrates, I'm starting to rethink my earlier identification. For one, the design of the occlusal surface doesn't match those of ordinary Equus teeth. The tooth I have is an m3 I believe, and comparing it to examples of Equus m3's shows this discrepancy quite well. The tooth is also very small, despite the roots having been worn off a long time ago - the crown length is exactly 2 cm and its width is 0.5 cm. I know that pre-Equus horse fossils can be found in the Brazos now after just having an astragalus I found identified as such, and after seeing @Lorne Ledger's very nice upper molar from a Nannippus pulled from the same stretch of the Brazos that I hunt. It's definitely within the realm of possibility. Any help would be appreciated!
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