Rhiodenticulatus heatoni
From Palaeos
Rhiodenticulatus heatoni, the only recognized species of the genus, is a small, single-tooth-rowed captorhinid.
Although generally primitive it shows some remarkable features in its skull structure: the lacrimal, a bone of the anterior side wall of the skull, is very high dorsoventrally, hence the snout has, in contrast to other captorhinids, a somewhat domed appearance. One of the middle upper jaw teeth has a base diameter about as twice the base diameter of the adjacent teeth but exceeds them only little in height. The premaxillary teeth are homodont whereas in most other captorhinids the first tooth is the largest and the following teeth are succesively smaller. Besides the skull also some postcranial bones are known, showing, however, no significant differences to that of other captorhinids. R. heatoni is the only representative of the, compared to other Permian taxa, poor captorhinid fossil record of the terrestrial Permian deposits of New Mexico.
| †Rhiodenticulatus heatoni Berman & Reisz 1986 | |
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Family: Captorhinidae
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Stratigraphic Range: Lower Permian: Wolfcampian |
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References
BERMAN, D.S. and REISZ, R.R. (1986): Captorhinid reptiles from the Early Permian of New Mexico, with description of a new genus and species. Ann. Carnegie Mus., 55, pp. 1-28
Credits
--Zidane 11:59, 25 May 2008 (PDT)
