1 Introduction

Genus Sicyonia H. Milne Edwards (1830) has wide distribution in Indo-West Pacific and Atlantic Oceans and Mediterranean Sea and contains 52 species (De Grave and Fransen, 2011), of which, four species, namely, Sicyonia fallax (De Man, 1907), S. lancifer (Olivier, 1811), S. longicauda (Rathbun 1906) and S. parjaponica (Crosnier, 2003) were reported from Indian waters (Kurian, 1953; George, 1966; Muthu, 1968, Kathirvel et al., 2007; Thirumilu, 2011; Radhakrishnan et al., 2012; Shanis et al, 2013; Chakraborty, 2017). While observing the deep sea catch landed at Thoothukudi, one specimen belonged to Sicyonia parajaponica was obtained and its record from Gulf of Mannar is reported here.

2 Material Examined

Every year, the deep sea fishing in Gulf of Mannar is confined to 4 months, from December to March. A single male specimen measuring 107 mm in total length, 18 mm in carapace length and weighing 15 g was found among the deep sea fish and crustaceans landed at Thoothukudi Fisheries harbour in March 2016. S. parajaponica the single specimen was collected from Thoothukudi fishing harbor, India, between 08° 52’12.1”N 78° 47’ 34.7”E. It was learnt that the deep sea trawling took place off Thoothukudi at a depth of 310 m, where the sea bottom was sandy with broken molluscan shells.

3 Systematic Position

Phylum Arthropoda von Siebold, 1848

Subphylum Crustacea Brünnich, 1772

Superclass Multicrustacea Regier, Shultz, Zwick, Hussey, Ball, Wetzer, Martin and Cunningham, 2010

Class Malacosreaca Latreille, 1802

Subclass Eumalacostraca Grobben, 1892

Superorder Eucarida Calman, 1904

Order Decapoda Latreille, 1802

Suborder Dendrobranchiata Bate, 1888

Superfamily Penaeoidea Rafinesque, 1815

Family Sicyoniidae Ortmann, 1898

Genus Sicyonia H. Milne Edwards, 1830

Species Sicyonia parajaponica Crosnier, 2003 (Figure 1)

Figure 1 Dorsal view of Sicyonia parajaponica

4 Synonyms

Sicyonia japonica Yu and Chan 1986, p. 56

Liu and Zhong 1988, p. 249, fig. 150

Crosnier 1995, p. 193

Sicyonia parajaponica Crosnier, 2003, p. 226, fig. 10 A-C, 11, 12 A-C and 106 E-F

Thirumilu, 2011, p. 12, fig. 2 a-b

Radhakrishnan et al., 2012, p. 56

Shanis et al., 2013, p. 131, fig. 1, 2 A and B, 3 A and B

Chakraborty, 2017, p. 156

5 Remarks

In general, the present material agrees with the description given by Crosnier (2003) and Shanis et al. (2013). The important characters observed are 1) both carapace and body robust, covered with scattered tubercles, their tip marked with red dot, 2) rostral tip bidentate, 3) 5 rostral teeth behind hepatic spine as observed by Crosnier (2003), Thirumilu (2011) and Shanis et al. (2013) a round red spot with white border near the posterior margin of carapace.

6 Distribution

India: West coast: off Kollam (Shanis et al., 2013); East coast: off Chennai (Thirumilu, 2011). The present record from off Thoothukudi, Gulf of Mannar is still further south along the southeast coast of India.

Indo-Pacific: Gulf of Aden, off Phuket in Andaman Sea, the Philippines, China, Taiwan and Australia (Crosnier, 2003).

Acknowledgements

The author is thankful to Thiru M. Kathirvel, former Principal Scientist of Central Institute of Brackishwater Aquaculture (I.C.A.R.), Chennai, for complete critical reading of the manuscript and helpful suggestion for its improvement.

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