Records of four mantis shrimp species (Crustacea: Stomatopoda) from the Ryukyu and Ogasawara islands, Japan

: Four mantis shrimp species are recorded from the Ryukyu and Ogasawara islands, southern Japan: Gonodactylaceus ternatensis (De Man, 1902) (Gonodactylidae); Lysiosquilloides siamensis (Naiyanetr, 1980) (Lysiosquil-lidae); Alimopsoides tuberculatus Moosa, 1991 (Squillidae); and Busquilla plantei Manning, 1978 (Squillidae). This is the first specimen-based record of G. ternatensis and the first distributional records of the latter three species from Japan. The genus Lysiosquilloides Manning, 1977 is recorded for the first time from Japanese waters, and the genus Alimopsoides Moosa, 1991 is newly found from the northern hemisphere. Diagnoses, taxonomic remarks, ecological notes and new standard Japanese names are provided.