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

Abstract

Four mantis shrimp species are recorded from the Ryukyu and Ogasawara islands, southern Japan: Gonodactylaceus ternatensis (De Man, 1902) (Gonodactylidae); Lysiosquilloides siamensis (Naiyanetr, 1980) (Lysiosquillidae); 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.

First Record of the Superfamily Eurysquilloidea (Crustacea: Stomatopoda) from Japan

“…Stomatopods are a group of carnivorous marine crustaceans and include about 500 species in the world (Schram et al 2013). Recent surveys in the Ryukyu Islands, southwestern Japan, have revealed a large diversity of stomatopod taxa (Ahyong 2012;Nakajima et al 2022), but members of the superfamily Eurysquilloidea have yet to be recorded anywhere from Japan, including the Ryukyu Islands [see the species list in Ahyong (2012)]. This superfamily can be distinguished from others by the combination of 1) ovate propodi of the maxillipeds 3-5, 2) usually distinct median carina of the telson [absent in Ankersquilla pardus Ahyong, Porter, andCaldwell, 2020 (Ahyong et al 2020); weakly developed in Sinosquilla hispida Liu and Wang, 1978 (Liu and Wang 1978)], 3) movable submedian teeth of the telson, and 4) ventrally recessed intermediate and lateral denticles of the telson (Ahyong 2001).…”