Ancistrocheiridae Pfeffer 1912

Family Ancistrocheiridae Pfeffer, 1912 Diagnosis: Modified from Fernández-Álvarez et al. (2022). Medium to large adult-sized Enoploteuthoidea with photophores embedded in the muscles of the tentacles; photophores of the surface of the mantle with two different sizes and geometrical assemblages; without visceral or ocular photophores; head and tail with fleshy, gelatinous tissue; nuchal folds present; buccal crown with 8 supports; with hooks, suckers or hard structures on all arms; tentacular clubs with hooks in two series on manus, suckers absent from manus, dactylus reduced, with a terminal pad; very large rhomboidal fins; posterior end of mantle elongate, with a short tail; digestive gland located far posterior to the nuchal cartilage; nidamental glands present; oviducts equally developed.