Longitudinal muscle fibers of body wall lie between layers of outer circular and inner oblique muscle-fibers. Blood-vessels present. Dwarf males parasitic on the females.
Source: Knight-Jones and Ryland, 1990.
The following taxa of this order occur in the region:
Family Bonelliidae
Genus Bonellia
Genus Maxmuelleria
Bonellia viridis
Maxmuelleria lankesteri