Monolene dubiosa Garman, 1899 .

Dark Flounder. To 18 cm (7.1 in) TL (Rodríguez-Romero et al. 2008). Isla Santa Margarita (at mouth of Bahía Magdalena), southern Baja California (Martínez-Muñoz and Ramírez-Cruz 1992); Pacific coast of Mexico (Hensley in Fischer et al. 1995) to Peru (Robertson et al. 2017) . Benthic; depth: about 20–457 m (66–1,499 ft) (min.: Aguilar-Palomino et al. 2001; max.: Morera et al. 20019). We follow Eveseenko (1999) and Robertson et al. (2017) and consider Monolene asaedae Clark, 1936 to be a junior synonym. Monolene asaedae is considered a valid species in Fricke et al. (2020).