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Members of this family are small, muscular, midwater squids that occupy tropical to subtropical waters probably at depths of 500-1000m during the day and near-surface waters at night. The posterior end of the mantle is broadly rounded. The fins are peculiar: they consist of muscular pillars (fin ribs) connected by thin membranes giving the appearance of a comb (hence the family name). The fin extends nearly the full length of the mantle.
A number of undescribed species are present in this genus. Little is known of the biology of any species.
A member of the Bathyteuthoidea ...
- with buccal connectives attaching to ventral border of arms IV.
- with long fins containing muscular ribs.