Trapezia guttata Rüppell, 1830

Alrasheedi, Sami M, Alrashdi, Mousa N, Alhumaidan, Lama S, Alkhdairi, Ahmad, Alzweihary, Ali M, Alhussaini, Omar M, Alharbi, Lama S, Albalawi, Amirah N, Almutairi, Turki F, Alharbi, Osama A G & Bashal, Afaf A M, 2024, Crabs of the Families Tetraliidae, Trapeziidae and Xanthidae (Crustacea: Decapoda: Brachyura) new to the Ogasawara Islands, Japan, Bulletin of the National Museum of Nature and Science. Series A, Zoology 50 (1), pp. 1-17 : 4

Trapezia guttata Rüppell, 1830

[Jn: Kanoko-sangogani]

( Fig. 2B )

Material examined. Chichi-jima Is.—Chichi-jima I., Omura Beach (27°05′35″N, 142°11′38″E), 12 m, 1♂ (NSMT-Cr 31511; cb 5.7×cl 5.0 mm), 13-XI-2013, H. Komatsu leg.

Remarks. This species is readily distinguished from the congeners by having the dark-colored front and the ambulatory legs with dark-colored spots of variable size and shape ( Fig. 2B ). Although the original description ( Rüppell, 1830, p. 27) is short, without figure, but the detailed references are referred to Serène (1984), with the figures of the distinguishing characters by Miers (1886, pl. 12 fig. 1), Sakai (1976, fig. 270, pl. 183 fig. 3), Chen and Lan (1978, pl. 2 fig. 8), and Serène (1984, pl. 38 fig. A). Castro (1997a, b; 2003; 2009) were greatly contributed to the taxonomy and distribution of the genus Trapezia including this species. Trapezia davaoensis Ward, 1941 , was synonymized with this species by Galil and Clark (1990) after the examination of the type specimens preserved in the American Museum of Natural History.

Distribution. Numerous specimens from many localities in the Indo-West Pacific waters were recorded by the previous studies including the works cited above. In Japanese waters this species is found in the coral islands of the Ryukyu Islands.

Figures

Fig. 2. A: Tetralia brunalineata Trautwein, juv. (NSMT-Cr 31510; cb 3.2×cl 2.7mm) from Hitomaru-jima. B: Trapezia guttata Rüppell, ♂(NSMT-Cr 31511; cb 5.7×cl 5.0mm) from Omura Beach, Chichi-jima. C: Trapezia serenei Odinetz, ovig.♀ (NSMT-Cr 31512; cb 10.3×cl 8.9 mm), from Omura Beach, Chichi-jima. D: Euryxanthops flexidentatus Garth and Kim, ♂ preserved in spirit (NSMT-Cr 31519; cb 22.2×cl 16.3mm) from Kaikata Seamount. E: Juxtaxanthias lividus (Latreille), ♂ preserved in spirit (NSMT-Cr 31527; cb 46.6×cl 31.0mm) from Futami Bay, Chichi-jima. F: Garthiella aberrans (Rathbun), ♀ (NSMT-Cr 31524; cb 8.5×cl 5.6mm) from Haha-jima. G: Lybia caestifera (Alcock), ♂ (NSMT-Cr 31535; cb 3.6×cl 3.2mm) from Ani-jima. H: Etisus odhneri Takeda, ♂ (NSMT-Cr 31514; cb 5.8×cl 4.3mm) from Ani-jima.