Trematopidae
| Trematopidae | ||||||||
|---|---|---|---|---|---|---|---|---|
Acheloma cummingsi |
||||||||
| Temporal occurrence | ||||||||
| Pennsylvania ( Upper Carbon ) to Lower Perm | ||||||||
| approx. 318 to 270 million years | ||||||||
| Locations | ||||||||
|
||||||||
| Systematics | ||||||||
|
||||||||
| Scientific name | ||||||||
| Trematopidae | ||||||||
| Williston , 1910 |
The Trematopidae is a family of Temnospondyler terrestrial vertebrates from the group of Dissorophoidea , whose representatives were found predominantly in the upper Pennsylvania and Lower Permian of the USA. The representatives found in Europe are Mordex from the Czech Republic , as well as Rotaryus and Tambachia from the Bromacker quarries on the northern edge of the small town of Tambach-Dietharz in Thuringia .
features
Compared to amphibamids and dissorophids , all trematopids have elongated skulls and an orbit further back, about midway along the length of the skull . The elongated nostrils are noticeable, so there may have been a gland at this point. Two teeth on the premaxillary were enlarged in trematopids, the sixth tooth of the maxillary counted anteriorly was also enlarged. For the first time, enlarged teeth appeared in Anconastes , Actiobates and Mordex . Unique to Anconastes is a dense armor of non-overlapping osteoderms that covered the trunk.
Genera
swell
- Robert L. Carroll (2009): The rise of amphibians - 365 million years of evolution , pp. 185-191. Johns Hopkins University Press, Baltimore. ISBN 0-8018-9140-X
