Most male members of this biological division mate by using a specialized arm called a hectocotylus, which in some species is self-amputated and left inside the female, while their spermatophores are stored in Needham's organ.
Most male members of this biological division mate by using a specialized arm called a hectocotylus, which in some species is self-amputated and left inside the female, while their spermatophores are stored in Needham's organ. In addition to a main heart, members of this class also posess two branchial hearts, and only the species Lolliguncula brevis is known to be commonly found in brackish, rather than salt water. Divided into Coleoida and Nautileoida subclasses, members of this class use hemocyanin as circulatory fluid and their viscera is enclosed in an active mantle, whose contraction provides the main mode of locomotion for members of this class. Containing the species Architeuthis which comprises the largest living invertebrates, for ten points, identify this class within the phylum Mollusca, which includes cuttlefish, squid, and octopi.
Most male members of this biological division mate by using a specialized arm called a hectocotylus, which in some species is self-amputated and left inside the female, while their spermatophores are stored in Needham's organ.
{cephalopoda}