with reference to the class mentioned, what is the meaning of the name it derives?
UNANSWERABLE
squid are members of what phylum and what class They are members of the class Cephalopoda, subclass Coleoidea.
wiki:11581445
Cephalopod [SEP] Introduction
A cephalopod () is any member of the molluscan class Cephalopoda (Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot. Fishermen sometimes call cephalopods "inkfish," referring to their common ability to squirt ink. The study of cephalopods is a branch of malacology known as teuthology. Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids. The class now contains two, only distantly related, extant subclasses: Coleoidea, which includes octopuses, squid, and cuttlefish; and Nautiloidea, represented by "Nautilus" and "Allonautilus".