Sakaija japonica ( Rathbun, 1932 )

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 : 169

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/03A9654B-FFBA-0763-566F-FF3F7DD8FD56
treatment provided by	Valdenar
scientific name	Sakaija japonica ( Rathbun, 1932 )
status

Treatment

Sakaija japonica ( Rathbun, 1932) View in CoL

( Figs. 28A–C View Fig , 31A–C View Fig , 33A–G View Fig , 37K View Fig , 40J View Fig , 42F View Fig , 46G View Fig , 51A, B View Fig , 52J View Fig , 54J View Fig , 56H View Fig )

Maja sp. – T. Sakai, 1932: 50, pl. 2, fig. 5, text-fig. 5.

Maja japonica Rathbun, 1932: 33 View in CoL . – T. Sakai, 1965: 83, pl. 37, fig. 1. – Serène, 1968: 57. – Takeda & Miyake, 1969: 512, pl. 17, fig. A, B, pl. 18, fig. B. – Takeda, 1973: 42. – Takeda, 1975: 127. – T. Sakai, 1976: 238, pl. 82, fig. 1; text-figs 126a, b. – Miyake, 1983: 44. – Dai et al., 1986: 150, pl. 18(1), text-fig. 76. – Griffin & Tranter, 1986: 216. – Huang, 1989: 339. – Dai & Yang, 1991: 135, pl. 18(1), text-fig. 76. – Takeda, 1993: 43. – Huang, 1994: 582. – Muraoka, 1998: 27. – Ng et al., 2001: 12. – Takeda, 2001: 235. – Maramura & Kosaka, 2003: 34. – Yang et al., 2008: 780. – Ng et al., 2008: 117 (list).

Maja japonica Yokoya, 1933: 157 View in CoL , text-fig. 56.

Maja nipponensis T. Sakai, 1934: 297 View in CoL , text-fig. 11. – T. Sakai, 1936: 100, text-fig. 46. – T. Sakai, 1938: 299, pl. 38, fig. 1, text-fig. 41.

Maja sakaii View in CoL – Miyake, 1983: 44, pl. 15 fig. 5.

Material examined. Holotype: male (16.2 × 13.0 mm) ( USNM 48252 View Materials ), off Honshu, Japan, coll. RV Albatross, 7 May 1900. Others: Japan – 1 male (18.7 × 14.6 mm) ( NHM 1961.6.5.120), Sagami Bay, Japan, coll. T. Sakai. — 1 male (with bopyrid) (15.6 × 13.4 mm), 1 female (20.3 × 15.4 mm) (NSMT-Cr 13177), Tosa Bay , coll. RV Kotoka-Maru, 21 January 1998. — 1 male (with bopyrid) (NSMT-Cr 1132), off Tsushima Islands , station 10, 33°57.7’N 129°11.6’E, sand and shell substrate, coll. Tsushima Expedition, 26 July 1968. — 1 male, 1 female ( USNM 120722 View Materials ), off Ashizuri Peninsula , Shikoku Island , 300 m, coll. T. Sakai & K. Sakai, 27–31 March 1966. — 1 juvenile female (carapace only) ( USNM 48483 View Materials ), station 4893, 10– 20 miles southwest of Goto Island , Eastern Seas , 106 fathoms, coll. RV Albatross, 9 August 1906. — 1 male, 2 females ( SMF), Tosa Bay , Kochi, Usa, coll. RV Toyohata-Maru, K. Sakai. Taiwan – 1 male (22.3 × 17.8 mm) ( ZRC 2013.1267 View Materials ), Tashi fishing port, Ilan County, northern Taiwan , coll. 11 July 1989. — 1 broken male (20.8 × 16.7 mm) ( ZRC 2013.2371 View Materials ), Tashi fishing port, Ilan County , northern Taiwan , coll. S.-H. Wu, 1997. — 1 ovigerous female (20.4 × 16.4 mm) ( ZRC 2013.1270 View Materials ), Tashi fishing port, Ilan County , northern Taiwan , coll. S.-H. Wu, 23 January 1999. — 1 male (22.6 × 17.9 mm) ( ZRC 2013.1269 View Materials ), Tashi fishing port, Ilan County , northern Taiwan , coll. S.-H. Wu, 8 March 1999. — 1 male (18.5 × 13.9 mm) ( ZRC 2013.1268 View Materials ), Tashi fishing port, Ilan County , northern Taiwan , coll. Hwang, 18 July 2011. GoogleMaps

Diagnosis. Carapace branchial area strongly inflated, rounded; with relatively short lateral and branchial spines ( Figs. 28A–C View Fig , 31A, B View Fig ). Pseudorostral spines short, diverging ( Fig. 37K View Fig ). Supraorbital eave strongly curved; antorbital spine short, triangular, sharp; intercalated spine triangular, separated from adjacent spines by large gaps; postorbital spine longest, triangular, pointed anteriorly; hepatic spine short pointed outwards ( Figs. 28A–C View Fig , 37K View Fig ). Lateral margin with 2 short spines, posterior one larger (often becoming tubercles in larger specimens); branchial region with 1 low spine or tubercle; median row with 4 low spines or tubercles: 2 gastric (posterior one larger), 1 cardiac, 1 intestinal; 2 short spiniform granules on posterior carapace margin ( Figs. 28A–C View Fig , 31A, B View Fig ). Basal antennal article long with several granules, 2 strong distal spines ( Fig. 40J View Fig ). Ischium of third maxilliped weakly granulated ( Fig. 46G View Fig ). Ambulatory legs relatively short ( Figs. 31C View Fig , 56H View Fig ). G1 distinctly curved, distal part long, tapering with very long setae ( Fig. 33A–G View Fig ).

Remarks. Despite its age, the type specimen is in a relatively good condition although the G1 appears rather frail and not easy to study. However, it agrees well with those from Japan and Taiwan, and we are confident of their conspecificity.

For a detailed discussion of its taxonomy, see remarks for S. sakaii .

In Japan, S. japonica has been reported from depths of between 85 and 120 m. Outside Japan, it has been recorded from Hong Kong ( Griffin & Tranter, 1986), although their specimens should be re-examined .

RV	Collection of Leptospira Strains
NHM	University of Nottingham
T	Tavera, Department of Geology and Geophysics
SMF	Forschungsinstitut und Natur-Museum Senckenberg

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Taxonomy

Kingdom	Animalia
Phylum	Arthropoda
Class	Malacostraca
Order	Decapoda
Family	Majidae
Genus	Sakaija