Elasmobranchii (sharks and rays) >
Squaliformes (Sleeper and dogfish sharks) >
Somniosidae (Sleeper sharks)
Etymology: Scymnodalatias: scymno-, referring to previous placement in Scymnodon; dalatias, referring to lack of dorsal spines like most sharks in the family Dalatiidae (sometimes included within Somniosidae). (See ETYFish); oligodon: oligos (Gr.), few or scanty; odontos (Gr.), tooth, referring to fewer teeth in upper jaw compared with congeners. (See ETYFish).