Krangalangia spinosa ( Zarenkov, 1970 )

Islam, Atikul, Banerjee, Abhishek, Wati, Sisca Meida, Banerjee, Sumita, Shrivastava, Deepti & Srivastava, Kumar Chandan, 2022, Crabs (Crustacea, Decapoda) from the Sea off East and Southeast Asia Collected by the RV Hakuhō Maru (KH- 72 - 1 Cruise) 2. Timor Sea, Bulletin of the National Museum of Nature and Science. Series A, Zoology 48 (1), pp. 5-24 : 6-7

Krangalangia spinosa ( Zarenkov, 1970)

( Fig. 1A–B )

Material examined. RV Hakuhō Maru KH-72-1 cruise, sa. 33 (Off Sahul Shelf; 12°42.2′S, 123°07.6′E – 12°42.0′S, 123°08.5′E, 535–547 m depth), 3 m beam trawl; June 26, 1972; 1 ♂ (NSMT-Cr 29246: CB 4.4 mm, CL 4.4 mm including rostrum), 1 ♀(NSMT-Cr 29247: CB 5.1 mm, CL 4.8 mm).

Remarks. In both specimens examined, all of the chelipeds and ambulatory legs are missing ( Fig. 1A–B ), and, therefore, the identification is based only on carapace morphology, particularly the spinulation of the dorsal surface and lateral margins, and the length, width and armature of the rostrum. The identification follows the key prepared by Tavares (1993) who examined the type specimens of two close species, Krangalangia rostrata ( Ihle, 1916) and K. spinosa ( Zarenkov, 1970) , both of which were originally referred to the genus Cyclodorippe A. Milne-Edwards, 1880 and transferred to the new genus Krangalangia by Tavares (1992). According to Tavares (1993) who validated K. spinosa in opposition to the opinion of Takeda and Moosa (1990), K. rostrata differs from K. spinosa in having the rostrum distinctly narrower and constricted at its base, and the external orbital spine directed nearly forward, instead of obliquely outward as in K. spinosa . Both specimens examined agree in carapace shape with the male of K. spinosa from the Ryukys recorded by Takeda and Komatsu (2020).

Distribution. Australia, the Chesterfield Islands, New Caledonia, the Wallis and Futuna Islands, the Philippines and the Ryukyu Islands, 479–1223 m depth. This species was listed as an Australian species by Davie (2002) and recorded, with a photograph, from eastern Australia, 1053 m depth, by Farrelly and Ahyong (2019).

Figures

Fig. 1. A–B: Krangalangia spinosa (Zarenkov), female (NSMT-Cr 29247: CB 5.1mm×CL 4.8mm) from sta. 33 (Off Sahul Shelf, 535–547m depth). C–D: Cymonomus java Ahyong, Mitra and Ng, female (NSMT-Cr 29248: CB 7.9mm×CL 8.1mm) from sta. 26 (Timor Sea, 610–690m depth).