Hydraena (Hydraenopsis) sahlbergi Orchymont, 1923
Hydraena sahlbergi Orchymont, 1923: 40; Perkins 1980: 141.
Hydraena (Hydraenopsis) sahlbergi Orchymont: Trizzino et al. 2013: App. 1.
DISTRIBUTION: Endemic to Brazil, presently known only from the type locality (Minas Gerais State, Santa Rita) .
HABITAT: Unknown.