FAMILY ONYCHOTEUTHIDAE GRAY, 1849

(26 SPECIES IN SEVEN GENERA)

Diagnosis: Small to massive adult-sized muscular Oegopsida with buccal connectives attached to the ventral borders of ventral arms; with two series of arm suckers; tentacle club with two series of hooks, hooks larger in the ventromedial series; usually without dactylus but with terminal pad; carpal locking apparatus formed by a well-defined circular region; funnel–mantle apparatus straight, reaching the anterior margin of the mantle; head with three or more occipital folds; gladius with a primary conus and usually with a prominent rostrum; without hectocotylization.

Remarks: According to MolluscaBase eds (2021b), the superfamily Onychoteuthoidea Gray, 1849 includes Ancistrocheiridae, Architeuthidae, Brachioteuthidae, Cycloteuthidae, Enoploteuthidae, Gonatidae, Histioteuthidae, Lepidoteuthidae, Lycoteuthidae, Neoteuthidae, Octopoteuthidae, Onychoteuthidae, Pholidoteuthidae, Psychroteuthidae and Pyroteuthidae . This taxonomic composition does not agree with the phylogeny provided here, but this name can be resurrected with a new diagnosis for Histioteuthidae, Onychoteuthidae and Psychroteuthidae if the morphological support provided by Young & Vecchione (2016a) for a relationship between Histioteuthidae and Psychroteuthidae and the weak molecular support provided here for a relationship between Histioteuthidae and Onychoteuthidae is supported in future phylogenetic analyses.