Hydraena (Hydraenopsis) orcula Perkins, 1980
Hydraena orcula Perkins, 1980: 140; Perkins 2011: 46, 132.
Hydraena (Hydraenopsis) orcula Perkins: Trizzino et al. 2013: App. 1.
DISTRIBUTION: Endemic to Brazil, presently known only from the type locality (Goiás State, Mosquito, near Retiro) .
HABITAT: Unknown.