Concluding contribution towards a revision of, and a key to, the genus Macrophthalmus (Crustacea: Brachyura)

In this ninth and final part of a revision of the ocypodid genus Macrophthalmus Latreille (Crustacea: Brachyura), eight species are considered—M. leptophthalmus (H. M. Edw.), M. boteltobagoe (Sakai), M. philippinensis SereGne, M. consobrinus Nobili, M. gastrodes Kemp, M. franchettii Maccagno, M. gallardoi SereGne and M. vietnamensis SereGne—and the status of a species previously considered valid, M. holthuisi SereGne, is reconsidered. Only M. leptophthalmus, M. boteltobagoe and M. philippinensis are considered valid. Macrophthalmus, as here revised, contains 38 living and three extinct species, whilst 33 species have been reduced to synonyms. These various species are summarily listed and a key to the living species is provided.