Anachlorocurtis commensalis Hayashi, 1975

Horka, Ivona, De Grave, Sammy & Ďuris, Zdenek, 2014, A new species of shrimp of the genus Anachlorocurtis Hayashi, 1975 from the Red Sea, with range extension of A. commensalis Hayashi, 1975 (Crustacea, Decapoda, Pandalidae), ZooKeys 407, pp. 9-28 : 21-23

Anachlorocurtis commensalis Hayashi, 1975 Figs 5 G–P, 6D, 7 E–G, 8

Anachlorocurtis commensalis Hayashi 1975: 172-182, figs 1-3.; Hayashi 2007: 147-150, figs 538-539.; Kawamoto and Okuno 2003: 64, colour photo.; Minemizu 2013: 129, colour photo.

Material examined.

(i) 8 spms (1 ovigerous female PoCL 2.6 mm, 1 female subadult PoCL 2 mm, 3 males PoCL 1.8-2.1 mm, 3 juveniles PoCL 1.6-1.8 mm) (OUMNH.ZC.2010.02.061), Gudanshr reef, Namwan Bay, Pingtung County, Taiwan, 21°56.531'N, 120°45.546'E, from bushy black coral, 10 m depth, leg. S De Grave, 07.12.2009 (fcn TAI-244); (ii) 10 spms (4 females ovigerous PoCL 2.5-2.6 mm, 1 female post ovigerous PoCL 2.6 mm, 1 female PoCL 2.3 mm, 1 female subadult PoCL 1.9 mm, 3 males PoCL 1.9-2.2 mm) (OUMNH.ZC.2010-02-010), Gudanshr reef, Namwan Bay, Pingtung County, Taiwan, 21°56.531'N, 120°45.546'E, from Cirrhipathes sp., 27 m depth, leg. S De Grave, 12.12.2009 (fcn TAI-327); (iii) 1 juvenile PoCL 1.8 mm (RMNH.CRUS.D.56181), Gudanshr reef, Namwan Bay, Pingtung County, Taiwan, from antipatharian on overhanging rock wall, 10.9 m depth, leg. Z Ďuriš, 11.11.2011 (fcn Tw11-11); (iv) 1 juvenile (damaged) PoCL 1.8 mm (OU Tw11-20B), Gudanshr reef, Namwan Bay, Pingtung County, Taiwan, upper side of rocky reef, from yellow branching antipatharian, 18.6 m depth, leg. Z Ďuriš, 03.11.2011 (fcn Tw11-20B); (v) 1 ovigerous female PoCL 2.3 (RMNH.CRUS.D.56182, Genbank KJ690258), 1 ovigerous female, PoCL 2.4 mm, 1 male PoCL 2.1 mm (NTOU M01305), Gudanshr reef, Namwan Bay, Pingtung County, Taiwan, upper side of reef, from dense bushy antipatharian, 22.1 m depth, leg. Z Ďuriš, 03.11.2011 (fcn Tw11-21); (vi) 1 ovigerous female PoCL 2.5 mm (dissected, dried for SEM; UO Tw12-79), Gudanshr reef, Namwan Bay, Pingtung County, Taiwan, reef slope, from antipatharian, 25.3 m depth, leg. Z Ďuriš & I Horká, 12.09.2012 (fcn Tw12-79).

Remarks.

The specimens examined agree well with the original description by Hayashi (1975). As in Anachlorocurtis occidentalis sp. n., the specimens examined of Anachlorocurtis commensalis vary in the dorsal armament of the carapace and rostrum (Fig. 5 G–L). In adult and subadult females the carapace with the rostrum is triple lobate, in contrast in males only the anterior, bidentate, lobe is developed, in addition to the posterior hooked tooth and a short styliform rostrum. In juveniles the posterior hooked is absent and the anterior ornamentation generally consists of a short simple rostrum with a single posterior dorsal tooth. The posterior dorsal submarginal tooth is small in adults and subadults, and is absent in juveniles. The rostral formula (see above) is 2-4 + 4-5 for adult females, 2-3 + 1-2 for subadult females, 2 + 1 (i.e. simple rostrum) for males, and 1-2 + 1 for juveniles. Cornea in males is almost globular, with the apical tubercle indistinct, in females the tubercle is more produced but not as developed as Anachlorocurtis occidentalis sp. n.

Colour in life.

Generally similar to that of Anachlorocurtis occidentalis sp. n., but the light transverse bands are greyish, more wide and distinctive in Anachlorocurtis commensalis (Fig. 6D); also see colour photos in Minemizu (1996: 8; 2000: 113; 2013: 129), Kato and Okuno (2000: 58) and Kawamoto and Okuno (2003: 64).

Distribution.

Kii Peninsula (type locality), Izu-Oshima and Hachijyo-jima, Izu Islands, and Kume-jima, Ryukyus, Japan ( Minemizu 1996, 2000, 2013, Kato and Okuno 2000), Kawamoto and Okuno (2003); South (Namwan) Bay, Taiwan (present report).