| 释义 |
syn·ap·si·da
\-psədə\ noun plural
Usage: capitalized
Etymology: New Latin, from synapsis + -ida
: a subclass of Reptilia comprising extinct reptiles of the Pennsylvanian, Permian, and Triassic, having a single pair of lateral temporal openings in the skull, and usually held to be ancestral to the true mammals — compare ictidosauria, therapsida |