Revision of the spider crab genus Maja Lamarck, 1801 (Crustacea: Brachyura: Majoidea: Majidae), with descriptions of seven new genera and 17 new species from the Atlantic and Indo-West Pacific Author Ng, Peter K. L. Author Forges, Bertrand Richer De text Raffles Bulletin of Zoology 2015 2015-05-29 63 110 225 journal article 10.5281/zenodo.5384590 2345-7600 5384590 40BCDD62-D35E-46D1-95A3-2CC0DF219DEE Sakaija santo n. sp. ( Figs. 32C, D , 33S–U , 37O , 40M , 46K , 51E , 54L , 56J , 70E ) Material examined. Holotype : male (9.4 × 6.6 mm ) ( MNHN ), station AT 61, west of Malo Island , Santo , 15°39.2’S 167°01.4’E , 266–281 m , Vanuatu , coll. RV Alis , SANTO 2006 , 4 October 2006 . Paratypes : Vanuatu – 2 females (13.2 × 10.1 mm , 13.7 × 10.6 mm ) ( ZRC 2013.1253 ), station AT 24, 23 September 2006 . — 3 females (13.1 × 10.4 mm , 12.8 × 10.0 mm, 12.6 × 9.0 mm) ( ZRC 2013.1245 ), station AT 64, west of Malo Island , Santo , 15°39.6’S 167°01.9’E , 249–252 m , coll. RV Alis , SANTO 2006 , 4 October 2006 . — 1 female (11.2 × 8.4 mm ) ( ZRC 2013.1253 ), Santo , coll. September–October 2006 . — 1 male (9.7 × 7.5 mm ), 2 females (13.4 × 9.9 mm , 11.5 × 8.7 mm ) ( ZRC 2013.1254 ), Santo , coll. September–October 2006 . — 1 female (13.4 × 10.4 mm ) ( ZRC 2013.1251 ), station AT 61, west of Malo Island , Santo , 15°39.6’S 167°01.9’E , 249–252 m , coll. RV Alis , SANTO 2006 , 4 October 2006 . — 1 female (12.8 × 9.5 mm ) ( ZRC 2013.1250 ), station AT 64, west of Malo Island , Santo , 15°39.6’S 167°01.9’E , 249–252 m , coll. RV Alis , SANTO 2006 , 4 October 2006 . — 1 female (8.5 × 6.3 mm ) ( ZRC 2013.1247 ), station ZB 6, southwest of Urélapa Island , Santo , 15°36.8’S 167°01.3’E , on patches of sand , 30 m , coll. RV Alis , SANTO 2006 , 28 September 2006 . — 2 females (11.9 × 9.4 mm , 12.5 × 9.9 mm ) ( ZRC 2013.1246 ), station AT 86, Scorff Passage , Santo , 15°31.9’S 167°16.2’E , 176–246 m , coll. RV Alis , SANTO 2006 , 12 October 2006 . — 1 male (damaged, 11.1 × 8.5 mm ) ( ZRC 2013.1248 ), station AT 117, Scorff Passage , Santo , 15°32.6’S 167°15.5’E , 123–196 m , coll. RV Alis , SANTO 2006 , 18 October 2006 . — 1 female (12.5 × 9.7 mm ) ( ZRC 2013.1249 ), station AT 117, Scorff Passage , Santo , 15°32.6’S 167°15.5’E , 123–196 m , coll. RV Alis , SANTO 2006 , 18 October 2006 . Others : New Caledonia – 1 male (22.2 × 17.8 mm ) (MNHN-IU-2013-1762), station CP 3884, 521– 567 m , 22°22’S 171°38’E , coll. EXBODI, 18 September 2011 . — 1 female (20.1 × 15.8 mm ) (MNHN- IU-2014-4010), station DW 2491, 24°44’S 159°40’E , coll. EBISCO, 18 6 October 2010 . Fig. 30. General habitus, Sakaija serenei n. sp. A, paratype male (14.3 × 10.9 mm) (ZRC 2013.1255), Philippines; B, paratype male (17.7 × 14.6 mm) (ZRC 2013.1262), Philippines; C, holotype male (17.4 × 14.7 mm) (NMCR), Philippines; D, paratype female (14.2 × 10.9 mm) (ZRC 2013.1255), Philippines. Fig. 31. Frontal and lateral views of carapaces, and right first ambulatory legs, Sakaija species. A –C, S. japonica male (22.6 × 17.9 mm) (ZRC 2013.1269), Taiwan; D–F, S. serenei n. sp. , paratype male (17.7 × 14.6 mm) (ZRC 2013.1262), Philippines. Fig. 32. General habitus, Sakaija species. A , S. longispinosa n. sp. , holotype ovigerous female (11.4 × 8.6 mm) (NMV J63792 ), Australia; B, S. longispinosa n. sp. , paratype ovigerous female (14.2 × 10.7 mm) (NMV J63197 ), Australia; C, S. santo n. sp. , holotype male (9.4 × 6.6 mm) (MNHN), Vanuatu; D, S. santo n. sp. , paratype female (13.1 × 10.4 mm) (ZRC 2013.1245), Vanuatu. Fig. 33. Left G1s, Sakaija species. A –C, S. japonica , holotype male (16.2 × 13.0 mm) (USNM 48252), Japan; D–F, S. japonica , male (22.3 × 17.8 mm) (ZRC 2013.1267), Taiwan; G, S. japonica (as Maja japonica , after T. Sakai, 1976 : text-fig. 126a); H, S. sakaii (as Maja sakaii , after Sakai, 1976 : text-fig. 125b); I, J, S. sakaii , male (9.0 × 6.6 mm) (NSMT-Cr 8094), Japan; K–M, S. serenei n. sp. , paratype male (14.3 × 10.9 mm) (ZRC 2013.1255), Philippines; N, O, S. africana (as Maja africana , after Griffin & Tranter, 1986 : fig. 73c, d); P–R, S. africana , male (32.2 × 25.4 mm) (MNHN-IU-2010-928), Madagascar; S–U, S. santo n. sp. , holotype male (9.4 × 6.6 mm) (MNHN), Vanuatu. Scale bars = 1.0 mm [D, K, P–R]; 0.5 mm [A, E, F, I, J, L, M, S–U]; 0.25 mm [B, C]. Diagnosis. Carapace branchial area gently inflated, ovate; with short lateral and branchial spines ( Fig. 32C, D ). Pseudorostral spines long, diverging ( Fig. 37O ). Supraorbital eave distinctly curved; antorbital spine strong, triangular; intercalated spine short, with large gaps between spines; postorbital spine strong, triangular, directed anteriorly; hepatic spine small, pointed outwards ( Fig. 37O ). Lateral margin with 2 spines, anterior one small, with granule between them; 1 long branchial spine; median row with 3 spines: 1 gastric (with granule anterior to it), 1 low cardiac; 1 intestinal (sometimes very low); posterior carapace margin with 3 short spines, median one longest ( Fig. 32C, D ). Basal antennal article with 2 low distal spines, with 2 rows of 3 or 4 granules ( Fig. 40M ). Ischium of third maxilliped distinctly granulated ( Fig. 46K ). Ambulatory legs long, slender ( Figs. 32C, D , 56J ). G1 sinuous, distal part turned backwards towards median line of sternum, with very long setae ( Fig. 33S–U ). Etymology. The species is name is derived from the name of the island from which the species was collected, Espiritu Santo in Vanuatu . The name is used as a noun in apposition. Remarks. In the general carapace morphology and proportions of the ambulatory legs, S. santo n. sp. is closest to S. serenei n. sp. They differ markedly in the form of the G1, which is gently curved and dorsoventrally flattened in S. serenei with the distal part elongate ( Fig. 33K–M ), but is less curved, more laterally flattened with the distal part ovoid in S. santo ( Fig. 33S–U ). In addition, the posterior carapace margin of S. santo is always conspiciously marked by a small but distinct median spine (with 2 smaller lateral ones) ( Fig. 32C, D ), absent or undiscernible in S. sakaii ( Fig. 28D, E, G ). This median spine may be low in some specimens of S. santo but is always visible. In S. sakaii , the posterior carapace margin has two median spines that may be very low ( Fig. 28D, E, G ). In S. santo , there are three spines with the median one longest, and while the lateral ones may become reduced, the median one is always distinct ( Fig. 32C, D ). The G1 structure of S. santo ( Fig. 33S–U ) is most similar to that of S. sakaii s. str. but the setae on the ovoid distal part are relatively shorter in the latter species ( Fig. 33H–J ).