Winsoria
Winsoria is a genus of land planarian belonging to the family Geoplaninae. It is monotypic, containing the sole species Winsoria bipatria. It is found in Argentina and Brazil.
Description
The genus Winsoria is distinguished from others of family Geoplaninae by the presence of a cephalic retractor muscle and a subneural parenchymal muscle layer that extends behind the ovaries. Additionally, it is distinguished by the presence of a protrusible penis and a long ovovitelline duct.W. bipatria can reach up to 50 mm in length. On the dorsum, there is a light yellow median band flanked by two black paramedian bands, which are in turn bordered by pastel yellow lateral bands. The ventral side of the body is yellowish on the front tip and body margins, and whitish on the creeping sole. Additionally, the species lacks a glandular margin and has a cylindrical pharynx.