Sakaija santo, Ng & Forges, 2015

Ng, Peter K. L. & Forges, Bertrand Richer De, 2015, 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, Raffles Bulletin of Zoology 63, pp. 110-225 : 174-178

publication ID	https://doi.org/ 10.5281/zenodo.5384590
publication LSID	lsid:zoobank.org:pub:40BCDD62-D35E-46D1-95A3-2CC0DF219DEE
persistent identifier	https://treatment.plazi.org/id/A8091AAD-AED9-4729-8074-CA1736CD6146
taxon LSID	lsid:zoobank.org:act:A8091AAD-AED9-4729-8074-CA1736CD6146
treatment provided by	Valdenar
scientific name	Sakaija santo
status	sp. nov.

Treatment

Sakaija santo View in CoL n. sp.

( Figs. 32C, D View Fig , 33S–U View Fig , 37O View Fig , 40M View Fig , 46K View Fig , 51E View Fig , 54L View Fig , 56J View Fig , 70E View Fig )

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 GoogleMaps . Paratypes: Vanuatu – 2 females (13.2 × 10.1 mm, 13.7 × 10.6 mm) ( ZRC 2013.1253 View Materials ), 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 View Materials ), station AT 64, west of Malo Island , Santo, 15°39.6’S 167°01.9’E GoogleMaps , 249–252 m, coll. RV Alis , SANTO 2006 , 4 October 2006 . — 1 female (11.2 × 8.4 mm) ( ZRC 2013.1253 View Materials ), 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 View Materials ), Santo, coll. September–October 2006 . — 1 female (13.4 × 10.4 mm) ( ZRC 2013.1251 View Materials ), station AT 61, west of Malo Island , Santo, 15°39.6’S 167°01.9’E GoogleMaps , 249–252 m, coll. RV Alis , SANTO 2006 , 4 October 2006 . — 1 female (12.8 × 9.5 mm) ( ZRC 2013.1250 View Materials ), station AT 64, west of Malo Island , Santo, 15°39.6’S 167°01.9’E GoogleMaps , 249–252 m, coll. RV Alis , SANTO 2006 , 4 October 2006 . — 1 female (8.5 × 6.3 mm) ( ZRC 2013.1247 View Materials ), station ZB 6, southwest of Urélapa Island , Santo, 15°36.8’S 167°01.3’E, on patches of sand GoogleMaps , 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 View Materials ), station AT 86, Scorff Passage , Santo, 15°31.9’S 167°16.2’E GoogleMaps , 176–246 m, coll. RV Alis , SANTO 2006 , 12 October 2006 . — 1 male (damaged, 11.1 × 8.5 mm) ( ZRC 2013.1248 View Materials ), station AT 117, Scorff Passage , Santo, 15°32.6’S 167°15.5’E GoogleMaps , 123–196 m, coll. RV Alis , SANTO 2006 , 18 October 2006 . — 1 female (12.5 × 9.7 mm) ( ZRC 2013.1249 View Materials ), station AT 117, Scorff Passage , Santo, 15°32.6’S 167°15.5’E GoogleMaps , 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 GoogleMaps . — 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.

Diagnosis. Carapace branchial area gently inflated, ovate; with short lateral and branchial spines ( Fig. 32C, D View Fig ). Pseudorostral spines long, diverging ( Fig. 37O View Fig ). 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 View Fig ). 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 View Fig ). Basal antennal article with 2 low distal spines, with 2 rows of 3 or 4 granules ( Fig. 40M View Fig ). Ischium of third maxilliped distinctly granulated ( Fig. 46K View Fig ). Ambulatory legs long, slender ( Figs. 32C, D View Fig , 56J View Fig ). G1 sinuous, distal part turned backwards towards median line of sternum, with very long setae ( Fig. 33S–U View Fig ).

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 View Fig ), but is less curved, more laterally flattened with the distal part ovoid in S. santo ( Fig. 33S–U View Fig ). 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 View Fig ), absent or undiscernible in S. sakaii ( Fig. 28D, E, G View Fig ). 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 View Fig ). 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 View Fig ). The G1 structure of S. santo ( Fig. 33S–U View Fig ) 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 View Fig ).