Verrill, 1892
Body rather slender, moderately or very flattened, with distinct and posteriorly bilobed caudal fin; rhynchocoel nearly as long as body; intestinal diverticula without ventral branches; mid-dorsal blood vessel extends full length of body; anterior tentacles present in sexually mature males; spermaries in two groups alongside and posterior to brain on each side of body.
Nectonemertes minima
Nectonemertes mirabilis
Nectonemertes primitiva