What does acetabulifera mean?
The definition of acetabulifera
Ac`e*tab`u*lif”e*ra, n. pl.
Etym: [NL. See Acetabuliferous.] (Zoöl.)

The division of Cephalopoda in which the arms are furnished with cup-shaped suckers, as the cuttlefishes, squids, and octopus; the Dibranchiata. See Cephalopoda.