Lysiosquilla tredecimdentata Holthuis 1941

Lysiosquilla tredecimdentata Holthuis, 1941 (Fig. 2A) Lysiosquilla maculata var. tredecimdentata Holthuis, 1941: 273, fig. 6. Lysiosquilla tredecimdentata.— Manning 1995: 132, fig. 68b, 69c, f, pl. 24.— Ahyong 2001: 136, fig. 66A–I.— Ahyong & Naiyanetr 2002: 288.—Ahyong et al. 2008: 41, fig. 30.— Pillai & Thirumilu 2006: 24.— Kathirvel 2008: 97.—Silambarasan & Senthilkumaar 2018: 10, fig. 2–3.— Trivedi et al. 2020: 225. Lysiosquilla maculata.— Babu et al. 2024: 360, fig. 2 a–b. Material examined. FSI/VIZAG/CRUST: 217, 2 male (TL 98–132 mm), 2 females (TL 270–281 mm), 17°59.6’N, 83°30.2’E, 50 m, coll. K. Silambarasan, 18 March 2019. Remarks. The present specimens agree with description given by Holthuis (1941), but a few apparent differences. In Holthuis’ specimen, the tip of the rostrum does not reach the dorsal process of the ophthalmic segment, whereas, in our specimens, it extends slightly beyond the tip of the dorsal process. However, this difference is considered a preservational artefact. The present specimens have 10 teeth on the dactylus of the raptorial claw, which is within the reported range of 9–13 (Holthuis 1941; Manning 1978a; Ahyong 2001; Ahyong et al. 2008). Lysiosquilla tredecimdentata closely resembles L. sulcirostris but can be distinguished by its cordiform (heart-shaped) rostral plate, whereas L. sulcirostris has a triangular rostral plate and fewer teeth on the dactylus of the raptorial claw (7 or 8 versus 9–13). Recently, Babu et al. (2024) recorded Lysiosquilla maculata (Fabricius, 1793) from India; it is based on a misidentification of L. tredecimdentata. Distribution. Western Indian Ocean from Oman to India, Gulf of Thailand, Vietnam, Taiwan, Australia, Central Pacific (Ahyong et al. 2008; Trivedi et al. 2020).