Euplana

Euplana is a genus of flatworm belonging to the family Euplanidae.

Description
Members of Euplana are defined by being somewhat elongated in shape. Members lack a prostatic vesicle, and the genital pores are close together. Tentacles are lacking, and unlike others in the family Euplanidae, the penis is not armed with any sort of stylet, being small or even absent. Species may or may not have a Lang's vesicle.

Taxonomy
There are currently four species accepted in Euplana: