Opistomum pallidum

Opistomum pallidum is a species of rhabdocoel flatworm in the family Typhloplanidae.

Description
The animal is 2 to 4.5 mm long. It possesses no eyes. The pharynx is caudally oriented and situated near the posterior end of the body.

Taxonomy
The species was described by Eduard Oscar Schmidt in 1848.

Distribution and habitat
It is known from Europe and Virginia (USA). It inhabits freshwater habitats, but is absent from streams and rivers.

Ecology and behavior
The species is found in Autumn, Winter and Spring. It is known to feed on naidid oligochaetes.