Pachyrhachis problematicus

Pachyrhachis problematicus

[‚pak·ē¦rak·əs ‚präb·ləmad·ə·kəs]
(paleontolgy)
A fossil snake showing features that are transitional between snakes and lizards.
References in periodicals archive ?
This slender, 3-foot-long snake, Pachyrhachis problematicus, lived in a shallow sea 95 million years ago.
Caldwell and Lee did a bone-by-bone comparison between the 97-million-year-old fossil, Pachyrhachis problematicus, and other animals.