-ˈseləkəs noun
Usage: capitalized
Etymology: New Latin, from chlamyd- + Selachus (synonym of Cetorhinus ), from Greek selachos cartilaginous fish — more at selachii
: a genus (coextensive with the family Chlamydoselachidae) comprising sharks with diplospondylic vertebrae, including the frilled shark and certain extinct related forms, and being placed with the Hexanchidae in the suborder Notidanoidea or isolated in a separate suborder