Tetrabranchia

Tetrabranchia

[‚te·trə′braŋ·kē·ə]
(invertebrate zoology)
A subclass of primitive mollusks of the class Cephalopoda; Nautilus is the only living form and is characterized by having four gills.
References in periodicals archive ?
Asexual reproduction by regeneration is common, however, in the spionids Polydora tetrabranchia (Campbell, 1955) and throughout the genus Polydorella (Radashevsky, 1996).