Blainville, 1827
Nemerteans with broad, dorsoventrally compressed bodies bearing a single posterior ventral sucker; proboscis unarmed; rhynchocoel opening into barrel-shaped foregut which is lined by rows of motile, ciliated papillae; intestine sinuous, without lateral diverticula; eyes and cerebral sensory organs absent; sexes separate, gonads generally numerous, closely packed on either side of the intestine; with entocommensal habits, typically living in the mantle chamber of bivalve molluscs.
Source: Gibson, 1982.
The following species of this genus occurs in the region:
Malacobdella grossa