Choices of Cephalopod Species for
Within the mollusks, cephalopods diverged from a monoplacophoran-like ancestor over 500 million years ago. Today, there are two living classes of cephalopods: the nautiloids (Nautilus and Allonautilus) and the coleoids (squid, cuttlefish, and octopus). The CephSeq Consortium has proposed that initial sequencing efforts be focused on a select group of species, chosen based on the curiosity of their biological features as well as the possible advantages of their practical use, and representing a broad phyogenetic distribution and ecologically diverse life histories. These species are Octopus vulgaris, Octopus bimaculoides, Hapalochlaena maculosa, Sepia officinalis, Loligo pealeii, Euprymna scolopes, Idiosepius, Architeuthis dux and Nautilus.