Head somewhat pointed, with the mouth 4-5 body-widths distant from the anterior tip. Also with no cerebral organs, and nerve cords situated in the inner longitudinal muscle layer throughout. Most cephalothricids lack an inner circular muscle layer.
Source: Gibson and Knight-Jones, 1990.
The following taxa of this family occur in the region:
Genus Cephalothrix
Genus Procephalothrix
Cephalothrix arenaria
Cephalothrix linearis
Cephalothrix rufifrons
Procephalothrix filiformis