Selachii

WORDNET DICTIONARY

selachii(n = noun.animal) elasmobranchii, subclass elasmobranchii, subclass selachii - sharks; rays; dogfishes; skates;

is a member of chondrichthyes, class chondrichthyes

is a kind of class

Selachii, n. pl. [NL., fr. Gr. a fish having cartilages instead of bones.].

An order of elasmobranchs including the sharks and rays; the Plagiostomi. Called also Selacha, Selache, and Selachoidei. [1913 Webster]