Proboscis with only two muscle layers; in everted position these are outer circular and inner longitudinal muscles. All members of this family have a horizontal slit along each side of the head.
Source: Gibson and Knight-Jones, 1990.
The following taxa of this family occur in the region:
Genus Lineus
Genus Micrura
Lineus albocinctus
Lineus bilineatus
Lineus lacteus
Lineus longissimus
Lineus ruber
Lineus sanguineus
Lineus viridis
Micrura fasciolata
Micrura purpurea