parapsida

\\pəˈrapsədə\ noun plural

Usage: capitalized

Etymology: New Latin, from para- (I) + -apsida (from Greek hapsid-, hapsis arch, loop) — more at apsis

in some classifications : a subclass of reptiles in which the skull has two dorsal temporal openings adjoining the parietals and which includes the ichthyosaurs and related extinct forms and sometimes the lizards and snakes — compare diapsida