Deep-sea spider crabs of the family Epialtidae MacLeay, 1838, from Papua New Guinea, with a redefinition of Tunepugettia Ng, Komai & Sato, 2017, and descriptions of two new genera (Crustacea: Decapoda: Brachyura: Majoidea) Author Lee, Bee Yan Author Forges, Bertrand Richer De Author Ng, Peter K. L. text Zootaxa 2019 2019-06-18 4619 1 1 44 journal article 26462 10.11646/zootaxa.4619.1.1 9aaf6711-748d-4067-a759-26d37802b7fc 1175-5326 3248363 CA6AEB18-2F97-449C-AE34-E1509DFFC841 Rochinia cidaris n. sp. ( Figs. 7 A–C, 9A–D) Material examined. Holotype : male (19.0 × 11.5 mm ) (MNHN-IU-2014-19044), stn CP4448, New Ireland , Papua New Guinea , 02°13’S 150°12’E , 564–743 m , coll. KAVIENG 2014, 1 September 2014 . Diagnosis. Carapace pyriform, covered with short, thin setae, smooth when denuded. Supraorbital eave with pre-orbital spine strong, directed upwards. Postorbital lobe cup-like. Carapace with 9 spines; 2 hepatic spines directed outwards, swollen basally; 1 mesogastric spine; 2 epibranchial granules; cardiac region slightly swollen with 1 cardiac spine; 2 short metabranchial spines; 2 long lateral branchial spines, directed outwards; 1 short posterior spine medially ( Fig. 7A ). Antennal flagellum shorter than pseudorostral spines. Basal antennal article longer than broad, distal angle of article blunt. Buccal frame covered by third maxilliped. Pterygostomial region with 4 granules on outer margin ( Fig. 7B ). Male chelipeds slender; propodus slightly inflated, with outer margin carinate; carpus outer surface with single carinate margin; merus triangular in cross-section; single granule on inner proximal surface. Ambulatory legs slender; P2 longest. Male thoracic sternum with sternites 3 and 4 depressed; sternites 3 and 4 with margin constricted anteriorly, posterior widest. Male pleon with triangular telson and 6 somites free ( Fig. 7B ). G1 straight, slightly constricted on distal third, distal tip with slight rounded angle on upper edge near rounded tip ( Fig. 9 A–D). Etymology. The term “ cidaris ” is a Latin term for crown, alluding to the spiny anterior half of the carapace of the crab. The name is used as a noun. Remarks. Rochinia cidaris n. sp. is morphologically similar to R . riversandersoni Alcock, 1895 , from off the Malabar coast, India , but differs in having less distinct carapace spines and possessing strong pre-orbital spines ( Fig. 7A, C ) (versus more distinct carapace spines and weak pre-orbital spines; cf. Alcock & Anderson 1896 : pl. 22 figs. 2, 4). Rochinia cidaris n. sp. has nine carapace spines ( Fig. 7A ) (versus 11 carapace spines on R . riversandersoni (cf. Alcock 1895: 203 ; Alcock & Anderson 1896 : pl. 22 figs. 2, 4); and its basal anternnal article has a blunt distal angle ( Fig. 7B ) (versus basal antennal article with sharp distal angle in R . riversandersoni (cf. Alcock 1895: 203 ; Alcock & Anderson 1896 : pl. 22 fig. 2a). The new species is currently only known from its type locality, New Ireland , Papua New Guinea .