HylocelisHylocelis is a genus of flatworm belonging to the family Cryptocelidae.DescriptionHylocelis is distinguished from other members of Cryptocelidae by the presence of tentacles, and tentacular and cerebral eye clusters. The male copulatory apparatus has a seminal vesicle and a penis stylet. The stylet is connected to the prostatic vesicle via a coiling ejaculatory duct. The female apparatus has a vagina bulbosa and a Lang's vesicle.SpeciesThe following species are recognized in Hylocelis: