Neocoleoidea
Introduction '''Neocoleoidea''' is a large group of marine cephalopods. This cohort contains two extant groups: Decapodiformes (squid, cuttlefish, and relatives) and Octopodiformes (octopuses and the vampire squid). Species within this group exist in all major habitats in the ocean, in both the southern and northern polar regions, and from intertidal zones to great depths. Whilst conventionally held to be monophyletic, the only morphological character for the group is the presence of suckers: although the presence of these features in the belemnites suggests that they do not support the Neocoleoidea, and hence that the group may be paraphyletic.
Taxonomy *Superorder Decapodiformes**Order Bathyteuthida**Order †Belemnitida**Order †Diplobelida**Order Idiosepida**Order Myopsida - coastal squid**Order Oegopsida - neritic squid**Order Sepiida - cuttlefish, pygmy, bobtail and bottletail squid**Order Spirulida - ram's horn squid*Superorder Octopodiformes**Family †Trachyteuthididae (''incertae sedis'')**Order Vampyromorphida: vampire squid**Order Octopoda: octopus*Superorder †Palaeoteuthomorpha**Order †Boletzkyida
References *  Taxonomy Netherlands