Trapezia serenei Odinetz, 1984, 1983

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 serenei Odinetz, 1984

[Jn: Seren-sangogani]

( Fig. 2C )

Material examined. Chichi-jima Is.—Chichi-jima I., Omura Beach (27°05′35″N, 142°11′38″E), 12 m, 1♂ (NSMT-Cr 31512; cb 7.4×cl 6.8 mm), 1 ovig.♀ (NSMT-Cr 31513; cb 10.3×cl 8.9 mm), 12-XI-2013, H. Komatsu leg.

Remarks. The specimens examined agree with the line drawing of the holotype from Guam ( Odinetz, 1984, fig. 3B). This species is, as explained in detail by Castro (1997a), most characteristic in orange-pink carapace, chelipeds and ambulatory legs, with the dark pinkish carapace margin and cheliped and ambulatory segments. Absence of orange-red spot on the distal end of the ambulatory propodi is said by Castro (1997a, b) to be an important clue to distinguish this species from the closest congener T. bidentata (Forskål, 1775) , which was made clear to be a senior synonym of T. ferruginea Latreille, 1828 , by Castro et al. (2004).

Distribution. West Pacific from the Ryukyu Islands to French Polynesia, and Western Australia. In Japan, this species was recorded by Sakai (1976, p. 507, pl. 182 fig. 2, as T. ferruginea , Yoron-to I., Ishigaki-jima I. and Taketomi-jima I.), and Nagai and Nomura (1988, p. 214, 1 unnumbered fig., as T. ferruginea , no definite locality in the Ryukyu Is.), and from Iriomote-jima I. by Minemizu (2000, p. 284, 1 unnumbered fig., as T. ferruginea , Iriomote-jima I.), and Higashiji et al. (2013, p. 85, fig. 2D, as T. serenei , Ie-jima I.).

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.