Minnesota Nice Posted December 15, 2016 Share Posted December 15, 2016 From White River formation South Dakota. Has some appearance of Oreodont but it seems small. Frango Ut Patefaciam...I Break in Order to Reveal Link to comment Share on other sites More sharing options...
caldigger Posted December 15, 2016 Share Posted December 15, 2016 Maybe a juvenile Oreodont. Link to comment Share on other sites More sharing options...
Minnesota Nice Posted December 15, 2016 Author Share Posted December 15, 2016 17 minutes ago, caldigger said: Maybe a juvenile Oreodont. Thought about that....When I compared it to a full set of teeth from an adult, these smaller teeth show considerable wear, making me think it is adult. Is there any other distinguishing characteristics of adult dentition in Oreodont? Frango Ut Patefaciam...I Break in Order to Reveal Link to comment Share on other sites More sharing options...
Harry Pristis Posted December 15, 2016 Share Posted December 15, 2016 Looks like oreodont to me. I have a skull w/mandible in which the lower tooth row is about two inches long. (The lower teeth are obscured by the uppers.) I am uncertain of the taxonomy. My specimen is labeled by the preparer, Merycoidodon sp., but I have an early reference to "Oreodon gracilis." Could be. this is now Merycododon gracilis. Maybe one of the Midwestern collectors will help us out. 2 http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
jpc Posted December 15, 2016 Share Posted December 15, 2016 I think Harry hit the nail on the head. Other than the teeth, the back end of an oreo jaw is very deep, and it looks like yours tends that way. The unworn tooth is the last molar, and if you look tat the jaw from the side it is deep under that last molar. Link to comment Share on other sites More sharing options...
abyssunder Posted December 15, 2016 Share Posted December 15, 2016 Looks like Merycoidodon partial lower jaw to me also, although I don't know which species belongs to. According to this document, the list of Chadron and Brule Formations comprise the following species : Early Oligocene (Chadronian) of Chadron Formation M. culbertsonii (Leidy)M. lewisi Clark and Beerbower, 1967 (CM9105) Middle Oligocene (Orellan) of Lower Brule Formation M. culbertsonii (Leidy), 1848 (ANSP10727, 10728)M. dani Schultz and Falkenbach Late Oligocene (Whitneyan) of Upper Brule Formation M. galushai Schultz and Falkenbach, 1968 (F:AM45279)M. lambi Schultz and Falkenbach, 1968 (F:AM72139)M. lynchi Schultz and Falkenbach, 1968 (F:AM45297) " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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