Some are brown or red and may bear conspicuous white stripes. Others are small and translucent enough to show the cerebral organs by transmitted light. These organs are embedded one on each side in the constriction separating the rounded, somewhat flattened head from the more or less cylindrical body. Cerebral organs are lacking, however, from Callinera and Carinesta . The nerve cords usually lie just below the basement menbrane of the epidermis, as in most palaeonemerteans, but Carinina (alone amongst the other nemerteans) has the nerve cords within the epidermis, outside the thin basement membrane.
Source: Gibson and Knight-Jones, 1990.
The following taxa of this family occur in the region:
Genus Callinera
Genus Carinina
Genus Tubulanus
Callinera buergeri
Carinina arenaria
Carinina coei
Tubulanus annulatus
Tubulanus linearis
Tubulanus polymorphus
Tubulanus superbus
Tubulanus theeli