21 in 3 subfamilies Orangeback Squid from Cephbase. ... Scientific classification - Wikipedia /**/ @import /skins/monobook/IE50Fixes. ... Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria Placozoa Bilateria Acoelomorpha Orthonectida Rhombozoa ?Myxozoa Superphylum Deuterostomia Chordata (vertebrates, etc. ... Classes Caudofoveata Aplacophora Polyplacophora - Chitons Monoplacophora Bivalvia - Bivalves Scaphopoda - Tusk shells Gastropoda - Snails and Slugs Cephalopoda - Squids, Octopuses, etc. ... Orders Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida Nautilida The Cephalopods (head-foot) are the mollusc class Cephalopoda characterized by bilateral body symmetry, a prominent head, and a modification of the mollusc foot into the form of arms or tentacles. ... Orders Sepiida Sepiolida Spirulida Teuthida Octopoda Vampyromorphida Subclass Coleoidea is the grouping of cephalopods containing all the primarily soft_bodied creatures. ... Suborders Myopsina Oegopsina Squids are the large, diverse group of marine mollusks, popular as food in cuisines as widely separated as the Japanese and the Italian. ... Families See text Oegopsina is a suborder of the squid order, Teuthida, in the Cephalopod Class. ... Japetus Steenstrup (1813 - 1897) was a Danish zoologist and biologist. ... 1857 was a common year starting on Thursday (see link for calendar). ... See genus (mathematics) for the use of the term in mathematics. ...