Trachysalambria aspera ( Alcock, 1905 )

Pillai, S. Lakshmi, Jeena, N. S., Maheswarudu, G., Sreesanth, L. & Ragesh, N., 2021, Trachysalambria aspera (Alcock, 1905) (Crustacea, Decapoda, Penaeidae) from the southeastern Arabian Sea, India, Zootaxa 4974 (2), pp. 396-400 : 396-397

Trachysalambria aspera ( Alcock, 1905)

Diagnosis: Integument hard and densely pubescent. Rostrum straight with 8–9 dorsal teeth excluding the epigastric tooth, postrostral carina distinct on its entire length ( Fig.1 , 2A ). Hepatic spine small but well developed and hepatic sulcus indistinct. The carina on the second abdominal segment incomplete, forms a tubercle located midway. Carina on abdominal segment 3 starting at 1/3 rd, from 4 to 6 complete ( Fig.1 , 2B ). Carina on 6 th abdominal segment end in sharp spine ( Fig.1 , 3A ). Epipodes present on first three pereiopods. The spines on the telson very short or minute not easily discerned. Fifth abdominal segment shorter than the sixth and sixth almost as long as the telson. The carina on telson distinct extending throughout its length ( Fig. 3B ). The median plate on the anterior portion of the thelycum semicircular, single transverse plate on the posterior portion ( Fig. 1 ).

Coloration in life. Body white to pinkish with numerous red chromatophores on the carapace and abdomen. Rostrum 2/3 rd reddish, white toward the tip, uropods reddish and outer border of telson red. The tergum of abdominal somites 2–5 red.

Comments. The study supports the conclusion of Chan et al. (2016) that the material examined and identified as T. aspera by them is indeed the species and also reports its presence from the southwest coast of India. The present material has identical 16S sequence with the Taiwanese and Indonesian material reported in Chan et al. (2016).

Figures

FIGURE 1. Trachypenaeus asper Alcock, 1905 type specimen (Courtesy ZSI, Kolkata, India)

FIGURE 2. A Rostrum; B. carina on 2nd abdominal segment forming a tubercle and on third segment carina starting at 1/3rd distance (T. aspera from southeastern Arabian Sea)

FIGURE 3. A. Carina on last abdominal segment ending in spine; B. carina on telson distinct (T. aspera from southeastern Arabian Sea)