Lised as dubious species. The paraterga in O. bisulcata are definitely too narrow to represent a species
of Orthomorpha (Pocock 1895; Jeekel 1965). Attems (1903) recorded it from Tjibodas, Java, Indonesia, apparently a misidentification. Both Attems (1937) and Jeekel (1968)
referred to it as a species incertae sedis, because it was based only on ♀ material. It
has been adequately redescribed by Jeekel (1965) from the ♀ lectotype coming from
Rangoon, Myanmar. Golovatch (1998) included it into his key to Orthomorpha species
for the sake of completeness. At present we are inclined to follow Jeekel (1968) and
exclude this species from Orthomorpha altogether.