Alcomaja miriky, 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 : 152-154

publication ID	https://doi.org/ 10.5281/zenodo.5384590
publication LSID	lsid:zoobank.org:pub:40BCDD62-D35E-46D1-95A3-2CC0DF219DEE
DOI	https://doi.org/10.5281/zenodo.5466801
persistent identifier	https://treatment.plazi.org/id/15226186-CDFB-4E8A-A0A3-0DEBF88599E2
taxon LSID	lsid:zoobank.org:act:15226186-CDFB-4E8A-A0A3-0DEBF88599E2
treatment provided by	Valdenar
scientific name	Alcomaja miriky
status	sp. nov.

Treatment

Alcomaja miriky View in CoL n. sp.

( Figs. 17E View Fig , 20O–Q View Fig , 36O View Fig , 45H View Fig , 49G View Fig , 69B View Fig )

Material examined. Holotype male (26.4 × 20.9 mm) (MNHN-IU-2010-929), station DW 3215, 12°32’S 47°54’E, 314–433 m, Madagascar, coll. MIRIKY, 30 June 2009. Paratype: Madagascar – 1 male (17.3 × 12.7 mm) ( ZRC 2013.1409 View Materials , ex MNHN-IU-2010-60), station CP 3284, 14°51’S 46°59’E, 236–297 m, coll. MIRIKY, 13 July 2009 GoogleMaps .

Diagnosis. Carapace elongated, pyriform; dorsal surface of carapace and ambulatory legs covered with short, hooked setae; with small rounded granules ( Fig. 17E View Fig ). Pseudorostral spines relatively long, curved, with rounded cross-section ( Fig. 36O View Fig ). Antorbital spine almost straight; intercalated spine acutely triangular; postocular spine very long; 1 distinct hepatic spine ( Fig. 36O View Fig ). Lateral and branchial spines strong in juveniles and adults ( Fig. 17E View Fig ). Subhepatic region with rugose, weakly granulated surface. Basal antennal article with low granules and 2 tubercles, with 2 relatively long distal spines. Ischium of third maxilliped almost smooth to slightly rugose ( Fig. 45H View Fig ). Ambulatory legs relatively short, first leg never twice length of carapace; surfaces distinctly setose ( Fig. 17E View Fig ). G1 gently curved with distal part gently curved downwards ( Fig. 20O–Q View Fig ).

Etymology. The species is named after the cruise that collected it, MIRIKY. The name is used as a noun in apposition.

Remarks. Alcomaja miriky n. sp. is very close to A. nagashimaensis (T. Sakai, 1969) . The main differences are as follow: the G1 of A. miriky is prominently less curved ( Fig. 20O–Q View Fig versus Fig. 20A–J View Fig ); the distal spines of the basal antennal article in A. miriky are relatively longer and sharper; the overall carapace is proportionately longer ( Fig. 17E View Fig versus Fig. 17A–C View Fig ); there is only one hepatic spine in A. miriky versus two in A. nagashimaensis ( Figs. 17E View Fig , 36O View Fig versus Figs. 17A–C View Fig , 36M View Fig ); there is one accessory spine on the postorbital spine in A. miriky which is absent in A. nagashimaensis ( Figs. 17E View Fig , 36O View Fig versus Figs. 17A–C View Fig , 36M View Fig ); and the pseudorostral spines of A. miriky are relatively longer and more curved ( Figs. 17E View Fig , 36O View Fig versus Figs. 17A–C View Fig , 36M View Fig ).