![](https://sciencepress.mnhn.fr/sites/default/files/periodiques/visuels/grand/algologie-grand-visuel-v2.jpg)
Lectotypes for the red algae Polysiphonia schousboei (=Leptosiphonia schousboei) and P. simpliciuscula (=Ophidocladus simpliciusculus) were designated here after the examination of original material housed in the Muséum national d'Histoire naturelle de Paris (cryptogamy collections, Herbier National).