Brada nuda Annenkova, 1922

Annenkova, N. P. 1923. [Genus Brada: Geographic distribution, new species, varieties, transitory forms and synonyms]. 15. IN: Derjugin, K. M. (Ed. ). Trudy Pervogo Vserossiikogo s'ezda Zoologoi, Anatomoi i Gistologov. Volume V. Petrograde.