Cycloes de Haan, 1837

Galil, Bella, 2001, The Calappidae of the Marquesas Islands with a description of a new species of Mursia (Crustacea, Decapoda, Brachyura), Zoosystema 23 (3), pp. 499-505 : 502-505

Genus Cycloes de Haan, 1837

Cycloes marisrubri Galil & Clark, 1996 ( Figs 1 ; 2 )

Cycloes marisrubri Galil & Clark, 1996: 197 , figs 6b;

9c; 10d-f; 12a, b.

MATERIAL EXAMINED. — Eiao I. Stn DW 1155,

7°58.9’S, 140°43.3’W, 80 m, 23.VIII.1997, 9 juv.

( MNHN B27601). — Stn DW 1156, 7°59.0’S,

140°43.7’W, 80 m, 23.VIII.1997, 1 cl 38.9 mm, 1 cl 20.2 mm, 6 juv. ( MNHN B27602). — Stn CP 1160, 7°57.8’S, 140°02.0’W, 49-55 m, 23.VIII.1997, 4 juv. ( MNHN B27603). — Stn DW 1266, 7°57.3’S, 140°42.6’W, 84 m, 4.IX.1997, 1 ovigerous cl 31.8 mm, 1 juv. ( MNHN B27604). — Stn DW 1279, 7°59.4’S, 140°42.2’W, 23-70 m, 6.IX.1997, 1 juv. ( MNHN B27605). — Stn DW 1280, 7°58.9’S, 140°43.3’W, 87-98 m, 6.IX.1997, 2 juv. ( MNHN B27606). — Stn DW 1284, 7°54.5’S, 140°35.7’W, 53-55 m, 7.IX.1997, 1 cl 37.6 mm, 15 juv. ( MNHN B27607).

Hiva Oa I. Stn DR 1200, 9°49.9’S, 139°08.9’W, 96- 100 m, 28.VIII.1997, 1 juv. ( MNHN B27608). — Stn DW 1203, 9°52.7’S, 139°02.2’W, 60-61 m, 28.VIII.1997, 1 juv. ( MNHN B27609). — Stn DW 1211, 9°50.2’S, 139°02.5’W, 50 m, 29.VIII.1997, 2 cl 34.0, 34.3 mm ( MNHN B27610). — Stn DW 1212, 9°49.9’S, 139°02.2’W, 50-80 m, 29.VIII.1997, 2 cl 25.9, 26.9 mm, 3 cl 25.1- ETYMOLOGY.— Named in honor of Joseph Poupin, in appreciation for his role in exploring the decapod fauna of French Polynesia.

DISTRIBUTION. – Known only from the type location – Marquesas Islands.

DESCRIPTION

Carapace convex, transversely ovate, 1.3 wide as long. Dorsal surface of carapace granulate; radial ridges little defined, bearing low granulate tubercles. Front wider than orbit, trilobate; median lobe triangular, projecting beyond lateral lobes. Gastric, cardiac, intestinal regions bordered laterally by shallow groove. Anterolateral margin arcuate, granulate, bearing nine granulate tubercles. Lateral spine 0.1 carapace width, granular. Posterolateral margin sharply convergent, beaded. Posterior margin bearing laterally a rounded denticle.

Eyes filling orbit, eyestalk short, granulate, setose, cornea large. Orbital margins with long plumose setae. Supraorbital margin unifissured. Inner orbital tooth separated from orbital margin by wide hiatus opening to oblique subhepatic canal. Subhepatic region minutely granulate. Third maxilliped not covering anterior part of buccal cavity, ischium of endopod with granulate row distally forming stridulating organ when rasped against milled ridge on dactylus of chela.

Chelipeds massive, subequal, granulose. Merus distally bispinose, distal spine twice as long as proximal spine. Superior margin of carpus distally dentate. Upper margin of palm crested, cut into eight denticles. External surface of palm prominently granulate, with larger, closer granules ventrally; bearing two tubercles below crest, two longitudinal rows of three granulate tubercles and with granular ridge, unevenly trilobate, with keellike proximal lobe, broad median lobe, smaller distal lobe; lower margin serrate. Internal surface of palm with thick pilose band near lower margin. Dactyl granulose on outer surface, bearing stridulating crest on inner surface. Dactyl of larger cheliped bearing large curved tooth basally, fitting into molariform teeth on pollex. Pereiopods large, laterally compressed, dactyli long, styliform. Pereiopodal meri with upper, lower margins granulose, upper margin of carpi costate, granulate.

Male abdomen prominently crested on second segment, crest bifissured, medially concave; segments 3-5 fused; 6 th segment subquadrate, its lateral margins slightly concave. Telson triangular, slightly shorter than 6 th segment.

First male pleopod stout, tapering, curved distad, distally spinulose. Second male pleopod long, slen- der, distally crook-shaped, tip slightly recurved.

Color

Carapace and pereiopods dull orange, diffuse reddish crescents surround posteriorly carapacial tubercules. Inner palmar face with small patch at base of dactylus.

REMARKS

M. poupini n. sp. is easily distinguished from the other Mursia species with crook-shaped second male pleopod – M. africana Galil, 1993 , M. flamma Galil, 1993 , M. microspina Davie & Short, 1989 : M. poupini n. sp. differs from M. africana in its much shorter lateral spine; from M. flamma in the shape of the lower horizontal row on outer palmar face, and in lacking the sharply triangular teeth on posterior margin of carapace; from M. microspina in its longer lateral spine, in the shape of the lower horizontal row on outer palmar face, and in lacking the large oculus-shaped patch on inner palmar face.

Figures

FIG. 1. — Cycloes marisrubri Galil & Clark, 1996, 26.VIII.1997 (MNHN B27623), dorsal view.

FIG. 2. — Cycloes marisrubri Galil & Clark, 1996,