Trapezia digitalis Latreille, 1828

Sun, Yu-Li, Jiang, Wei & Sha, Zhong-Li, 2024, Shallow-water Trapezioidea (Decapoda: Brachyura) from the South China Sea, including two new records, and notes on Tetralia glaberrima Herbst, 1790, Zootaxa 5476 (1), pp. 393-423 : 408

publication ID	https://doi.org/10.11646/zootaxa.5476.1.30
publication LSID	lsid:zoobank.org:pub:D5F945AF-65F2-4AB3-AE00-B4C9BC0CE8F3
DOI	https://doi.org/10.5281/zenodo.12746867
persistent identifier	https://treatment.plazi.org/id/03EE87D1-B22A-FFCE-FF4B-FCC67252F844
treatment provided by	Plazi (2024-07-07 18:07:39, last updated 2024-11-29 15:26:07)
scientific name	Trapezia digitalis Latreille, 1828
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Trapezia digitalis Latreille, 1828 View in CoL

( Fig. 7D, E View FIGURE 7 )

Trapezia digitalis Latreille, 1828: 696 View in CoL .— Serène 1984: 277, fig. 185, pl. 38D.— Castro 1997a: 78, pl. 3B; 1997b: 120; 2009: 273; 2011: 80.— Galil 1987: 161, fig. 2.— Castro et al. 2004: 50.— Liu et al. 2008: 792 (list) (Hainan Island, Taiwan Island, the Xisha Islands).— Higashiji 2013: 87, fig. 2F (Ryukyu Islands).— Limviriyakul 2016: 5, fig. 4q ( Taiwan Island).— Poupin 2018: 40, fig. 12J ( Mayotte Island).— El-Sayed 2019: 49 (Red Sea).

Trapezia leucodactyla Rüppell, 1830: 28 .

Trapezia fusca Hombron & Jacquinot, 1852 , pl. 4, fig. 17-18.—Lucas, 1853, p. 45.

Trapezia nigro-fusca Stimpson, 1860: 219 .

Trapezia ferruginea var. digitalis Paulson, 1875: 49 , pl. 7, figs 5-6.

Trapezia digitalis var. typica Borradaile, 1902: 265 .

Grapsillus digitalis Rathbun, 1906: 866 .

Material examined. Nansha Islands: Mischief Reef, 115°32.5’E 9°55.7’N, 11 m, coll. Shaobo Ma , Yuli Sun , Ziming Yuan , 5 May 2022, 1 female (7.59 × 5.87 mm), NS-MJJ-2022-1047; GoogleMaps 1 pre-adult (2.38 × 2.07 mm), NS- MJJ-2022-1106; 1 male (4.56 × 3.65 mm), NS-MJJ-2022-1107; 1 female (3.22 × 2.51 mm), NS-MJJ-2022-1108; 1 male (3.02 × 2.36 mm), NS-MJJ-2022-1109; 1 female (3.62 × 3.08 mm), NS-MJJ-2022-1110; 115°29.8’E 9°54.4’N, 13 m, coll. Shaobo Ma, Yuli Sun , Ziming Yuan , 6 May 2022, GoogleMaps 1 female (4.45 × 3.56 mm), NS-MJJ-2022-1316; 1 male (5.62 × 4.67 mmNS-MJJ-2022-1317); 115°31.3’E 9°52.6’N, 8 m, coll. Shaobo Ma , Yuli Sun , Ziming Yuan , 7 May 2022, GoogleMaps 1 male (4.56 × 3.53 mm), NS-MJJ-2022-1375; 115°33.8’E 9°52.9’N, 8 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 9 May 2022, GoogleMaps 1 pre-adult (2.32 × 1.75 mm), NS-MJ-2022-1616. Fiery Cross Reef , 112°58.6’E 9°38.7’N, 10 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 12 May 2022 GoogleMaps , 1 female (4.51 × 3.54 mm), NS-YS-2022- 1012; 113°0.8’E 9°39.9’N, 10 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 14 May 2022, GoogleMaps 4 juveniles (3.34 × 2.67 mm; 3.68 × 2.70 mm; 3.41 × 2.53 mm; 2.10 × 1.82 mm), NS-YS-2022-1172; GoogleMaps 1 male (4.69 × 3.90 mm), NS-MJJ-2022-1192; 4 pre-adults (3.08 × 2.59 mm; 2.27 × 1.98 mm; 2.54 × 1.88 mm; 2.55 × 1.95 mm), NS-YS-2022-1234. GoogleMaps — Zhongsha Islands: Walker Shoal , 114°29.0’E 15°55.0’N, 15 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 17 May 2022, 1 male (9.26 × 7.48 mm), GoogleMaps 1 female (10.10 × 7.5 mm), ZS-MB-2022-1053; 17 m, coll. Wei Jiang, 6 May 2019, 1 pre-adult (3.67 × 2.90 mm), ZS105C12. Shenhu Shoal, 17 m, coll. Wei Jiang, 5 July 2020, GoogleMaps 1 male (8.81 × 7.56 mm), ZS244C05; 20 m, 4 June 2021, GoogleMaps 1 male (12.72 × 9.90 mm), ZS2021C9. GoogleMaps — Xisha Islands: Yongle Island , 111°44.3’E 16°33.0’N, 10 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 22 May 2022, 1 female (4.51 × 3.54 mm), XS-YL-2022-1012); GoogleMaps 1 pre-adult (2.68 × 1.96 mm), XS-YL-2002-1053. GoogleMaps — Hainan Island: Jiajing Dao, coll. Wei Jiang, 28 March 2018, 1 female (7.76 × 5.89 mm), 100-1026-1029. All found in Pocillopora sp. ( Pocilloporidae ) GoogleMaps .

Geographical distribution. Across Indo-West Pacific and Tropical Eastern Pacific regions ( Castro 2011).

Remarks. Two color patterns of Trapezia digitalis are commonly observed in pre-adults: one is the same as the adult color, which is chocolate brown, and the other has a brown anterior half and a creamy white posterior half of the carapace ( Fig. 7E View FIGURE 7 , NS-MJ-2022-1672).

References

Castro, P. (1997 a) Trapeziid crabs (Brachyura: Xanthoidea: Trapeziidae) of New Caledonia, eastern Australia, and the Coral Sea. In: Richer de Forges, B. (Ed.), Les fonds meubles des lagons de Nouvelle-CalMonie (Sedimentologie, Benthos). Vol. 3. Etudes et Theses. ORSTOM, Paris, pp. 59 - 107.

Castro, P., Ng, P. K. L. & Ahyong, S. T. (2004) Phylogeny and systematics of the Trapeziidae Miers, 1886 (Crustacea: Brachyura), with the description of a new family. Zootaxa, 643 (1), 1 - 70. https: // doi. org / 10.11646 / zootaxa. 643.1.1

Castro, P. (2011) Catalog of the anomuran and brachyuran crabs (Crustacea: Decapoda: Anomura, Brachyura) of the Hawaiian Islands. Zootaxa, 2947 (1), 1 - 154. https: // doi. org / 10.11646 / zootaxa. 2947.1.1

El-Sayed, A. A. M., Abd El Khalek, A. M., Amer, M. A. & Sarhan, M. M. H. (2019) The guard coral crabs of families Trapeziidae and Domeciidae (Superfamily Trapezoidea) from the Egyptian Red Sea coasts, and its associated gulfs, Aqaba and Suez, Egypt. Egyptian Academic Journal of Biological Sciences. A, Entomology, 11 (3), 43 - 65. https: // doi. org / 10.21608 / eajbsz. 2019.60910

Galil, B. (1987) Trapeziidae (Decapoda: Brachyura: Xanthoidea) of the Red Sea. Israel Journal of Zoology, 34, 159 - 182.

Higashiji, T., Yamamoto, H., Castro, P., & Komai, T. (2013) Records of species of Trapezia (Crustacea: Decapoda: Brachyura: Trapeziidae) associated with pocilloporid corals attached to floating fish rafts (payao) off Okinawa, Ryukyu Islands. Biological Magazine Okinawa, 51, 83 - 91. [in Japanese]

Limviriyakul, P., Tseng, L. - C., Hwang, J. - S. & Shih, T. - W. (2016) Anomuran and brachyuran symbiotic crabs in coastal areas between the southern Ryukyu arc and the Coral Triangle. Zoological Studies, 55, 1 - 14.

Liu, J. Y. (Ruiyu) (Ed.) (2008) Checklist of marine biota of China seas. China Science Press, Beijing, pp. 791 - 792.

Poupin, J., Cleva, R., Bouchard, J. - M., Dinhut, V. & Dumas, J. (2018) The crabs from Mayotte Islands (Crustacea, Decapoda, Brachyura). Atoll Research Bulletin, 617, 1 - 109. https: // doi. org / 10.5479 / si. 0077 - 5630.617

Serene, R. (1984) Crustaces Decapodes Brachyoures de l'Ocean Indien Occidental et de la Mer Rouge, Xanthoidea: Xanthidae et Trapeziidae. Avec un addendum par A. Crosnier: Carpiliidae et Menippidae. Faune Tropicale, 24, 1 - 349.

Figures

FIGURE 7. A, Quadrella coronata Dana, 1852, male (alcohol fixed specimen) (8.37 × 8.05 mm) (YM191), Western Pacific; B, Trapezia bidentata Forskål, 1775, male (15.37 × 13.08 mm) (SHAS01), Zhongsha Islands, Shenhu Shoal; C, Trapezia cymodoce Herbst, 1801, male (8.45 × 7.07 mm) (LY1752), Xisha Islands: Antelope Reef; D, Trapezia digitalis Latreille, 1828, ovigerous female (7.59 × 5.87 mm) (NS-MJJ-2022-1047), Nansha Islands, Mischief Reef; E, Trapezia digitalis, juvenile (3.34 × 2.67 mm) (NS-YS-2022-1172), Nansha Islands, Fiery Cross Reef.