A Revision of the Subfamily Octangiinae (Platyhelminthes, Digenea, Microscaphidiidae) Parasitic in Marine Turtles (Reptilia, Chelonia)

Abstract

The subfamily Octangiinae Looss, 1902 is considered to contain two genera. Two species are recognised in Octangium Looss, 1902. These are O. sagitta (Looss, 1899) Looss, 1902 (hosts Chelonia mydas (L.); Eretmochelys imbricata (L.): synonyms Octangium hasta Looss, 1902; ?O. takanoi Kobayashi, 1921) and O. hyphalum, sp. nov. (host Chelonia mydas: synonym O. takanoi Kobayashi sensu Mehrotra 1973 and Tandon and Gupta 1981). The genus Neoctangium Ruiz, 1943 contains only N. travassosi Ruiz, 1943 (hosts Chelonia mydas; Eretmochelys imbricata: synonym ?Neoctangium trinidadi Gupta, 1962). Octangium microrchis Chattopadhyaya, 1972 (host E. imbricata) and O. elongatum Chattopadhyaya, 1972 (host C. mydas) are regarded as species inquirendae.