ORDER OEGOPSIDA D’ ORBIGNY, 1845

(252 SPECIES)

Diagnosis: Squids without a cornea covering the eyes; without suckers on the buccal membrane; without circularis muscles in the arm and tentacle suckers; without accessory nidamental glands; tentacles usually with carpal locking apparatus; gills with branchial canal; with duplications of the mitochondrial genes atp6, atp8, cox1, cox2, cox3 and trnD, although lost in some clades.