Basionym Name:Hysterium expallens Schwein., Trans. Am. phil. Soc., New Series 4(2): 246 (1832)
Homotypic synonyms:Hypoderma expallens (Schwein.) Cooke, Bull. Buffalo Soc. nat. Sci. 3(1): 35 (1875)Hypodermopsis expallens (Schwein.) Kuntze, Revis. gen. pl. (Leipzig) 3(3): 487 (1898)