Himantosoma bidivisum Silvestri, 1919
Himantosoma typicum var. bidivisa Silvestri, 1919: 101, fig. 37 Himantosoma porosum var. bidivisum —Attems, 1929: 339
Himantosoma porosum var. bidivisum —Attems, 1938: 322
Previous records. PHU YEN (Deo Ca Pass); KHANH HOA (Nha Trang, Cau Da; Suoi Dau) (Attems, 1938).
Remarks. Also known from India (Silvestri, 1919). The species was originally described as variaties H. typicum var. bidivisa (Silvestri, 1919), but errorously listed as H. porosum bidivisum by Attems (1938). The records from Vietnam are doubtful, and need to be carefully revised.