Eumunida spinosa, Macpherson, 2006

Macpherson, Enrique, 2006, New species and new occurrence of Galatheoidea (Crustacea, Decapoda) from New Caledonia, Zoosystema 28 (3), pp. 669-681 : 670-671

Eumunida spinosa n. sp.

( Fig. 1 )

HOLOTYPE. — New Caledonia. NORFOLK 2, stn 2055, 23°39.23’S, 168°16.43’E, 900-950 m, 24.X.2003, ♂ 18.3 mm (MNHN-Ga 4623).

PARATYPES. — New Caledonia. NORFOLK 2, stn

2046, 23°43.87’S, 168°01.03’E, 785-810 m, 23.X.2003, 1 ♂ 11.5 mm. — Stn 2047, 23°43.04’S, 168°01.92’E, 759-807 m, 23.X.2003, 8 ♂♂ 6.5-14.8 mm; 1 ovig. ♀ 17.4 mm; 1 ♀ 6.4 mm. — Stn 2049, 23°42.88’S, 168°16.43’E, 470-621 m, 24.X.2003, 1♂ broken. — Stn 2054, 23°39.62’S, 168°15.17’E, 736-800 m, 24.X.2003, 1 ♀ 5.4 mm. — Stn 2055, 23°39.23’S, 168°16.43’E, 900-950 m, 24.X.2003, 1 ♂ 6.4 mm; 1 ♀ 6.5 mm.

ETYMOLOGY. — From the Latin, spina, spine, thorn, in reference to the numerous spines in the chelipeds.

DISTRIBUTION. — New Caledonia, Norfolk Ridge, between 470 and 950 m.

DESCRIPTION

Carapace slightly wider than long,exclusive of rostrum. Gastric region well defined, moderately convex; three hepatic spines, first spine strong, near base of outer supraocular spine, two outer hepatic spines small and subequal in size. Cervical groove and its posterior branch distinctly marked; grooves separating cardiac and branchial areas weakly developed.Transverse ridges as illustrated,with short and dense short setae;anterior branchial region smooth, with few short squamiform striae;five transverse ridges behind cervical groove,first and second interrupted in cardiac region;third to fifth interrupted medially; some small striae on anterior half of branchial regions. Lateral margins convex, armed with six spines decreasing in size posteriorly, two anterolateral spines anterior to cervical groove; greatest width measured between penultimate lateral spines; first spine strong, more than half length of second supraocular spine, and clearly overreaching sinus between supraocular spines, clearly longer than second anterolateral spines ( Fig. 1A ). Strong distal spine in pterygostomian area.

Second abdominal segment as illustrated; two transverse ridges, and some short striae on each side ( Fig. 1C ).

Sternal plastron medially concave; pair of well developed median processes on anterior margin of third thoracic sternum; fourth thoracic sternum with prominent lateral spine and setiferous transverse ridges ( Fig. 1B ).

Figures

FIG. 1. — Eumunida spinosa n. sp., holotype, ♂ 18.3 mm: A, carapace, dorsal view; B, anterior part of sternal plastron; C, left lateral side of the second abdominal somite; D, ventral view of left antennal peduncle; E, merus of right third maxilliped, lateral view; F, right cheliped, mesial view of the carpus and palm; G, right cheliped,mesial view of the fingers; H, right first walking leg, lateral view. Scale