Alcomaja confragosa
Creators: name: Ng, Peter K. L.
name: Forges, Bertrand Richer De
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Majidae
Alcomaja
Alcomaja confragosa

description: <i>Alcomaja confragosa</i> (Griffin &amp; Tranter, 1986) (Figs. 16D, E, 18A, B, 19G) <i>Maja confragosa</i> Griffin &amp; Tranter, 1986: 213, figs. 72, 73a, b, pl. 16. – Poore et al., 2008: 61. – Ng et al., 2008: 117 (list). <b>Material examined.</b> <b>Australia</b> – 1 young female (21.5 × 18.2 mm) (NMV J53978), off Point Cloates, 22°37.06’S 113°29.03’E – 22°37.02’S 113°28.56’E, Western Australia, 355–382 m, coll. G. Poore, CSIRO RV <i>Southern Surveyor</i>, 9 December 2005. <b>Diagnosis.</b> Carapace pyriform; dorsal surface of carapace and ambulatory legs covered with short, hooked setae; with small and large rounded granules, some of which merge basally (Fig. 16D, E). Pseudorostral spines with rounded cross-section (Fig. 18A, B). Intercalated spine acutely triangular; antorbital spine gently curved (Fig. 18A, B). Lateral and branchial spines strong in juveniles, weak in adults (Fig. 16D, E). Subhepatic region with distinctly granulated surface. Basal antennal article with numerous distinct granules. Ischium of third maxilliped distinctly granulated, especially on outer margin, with 2 large blunt distal spines. Adult male ambulatory leg condition not known (Fig. 16E). G1 gently curved, distal part relatively short (Fig. 19G). <b>Remarks.</b> A small female specimen collected from the northern part of Western Australia agrees very well with the type male described in Griffin &amp; Tranter (1986). The holotype of <i>Maja confragosa</i> was described from Indonesia, in the Eastern Mollucas. The new material comes from the Tropic of Capricorn near 22°S in the same depth range, around 300 m. Differences with the allied <i>A. irrorata</i> n. sp. and <i>A. gracilipes</i> (Chen &amp; Ng, 1999) are discussed under these two species.
description: Published as part of <i>Ng, Peter K. L. &amp; 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, pp. 110-225 in Raffles Bulletin of Zoology 63</i> on page 147, DOI: 10.5281/zenodo.5384590
description: {"references": ["Griffin DJG &amp; Tranter HA (1986) The Decapoda Brachyura of the Siboga Expedition. Part VIII. Majidae. Siboga-Expeditie, 39 C 4: 1 - 335, 22 pls.", "Poore GCB, McCallum AW &amp; Taylor J (2008) Decapod Crustacea of the continental margin of southwestern and central Western Australia: preliminary identifications of 524 species from FRV Southern Surveyor voyage SS 10 - 2005. Museum Victoria Science Reports, 11: 1 - 106.", "Ng PKL, Guinot D &amp; Davie PJF (2008) Systema Brachyurorum: Part I. An annotated checklist of extant brachyuran crabs of the world. Raffles Bulletin of Zoology, Supplement 17: 1 - 286.", "Chen HL &amp; Ng PKL (1999) Description of a new spider crab, Maja gracilipes, from the South China Sea, with notes on the taxonomic validity of M. brevispinosis Dai, 1981 (Crustacea: Decapoda: Brachyura: Majidae). Proceedings of the Biological Society of Washington, 112 (4): 754 - 758, Figs. 1, 2."]}