Multisepta is a genus of flatworm belonging to the family Cryptocelidae.

Members of Multisepta have tentacles, and both cerebral and tentacular eye clusters are present.

The male copulatory apparatus has a true seminal vesicle and a complicated stylet.

[2] The generic name Multisepta is derived from the Latin words multiplex and septum, meaning "multiple partitions", which refers to the unique structure of the species' prostatic vesicle.

The specific epithet fengari is derived from the Greek φεγγάρι (fengári), meaning "moon", in reference to the species dorsally resembling translucent moonlight.