Neaxius trondlei, Ngoc-Ho, 2005

Ngoc-Ho, Nguyen, 2005, Thalassinidea (Crustacea, Decapoda) from French Polynesia, Zoosystema 27 (1), pp. 47-83 : 59

Neaxius trondlei n. sp.

( Figs 6 ; 7 )

TYPE MATERIAL. — Holotype: Marquesas Islands, Ua Huka, MUSORSTOM 9, stn 19, Hane bay , W coast, with algae, corals, pebbles, 5.X.1997, R. von Cosel, J. Trondlé, J. Tardy coll., cl. 29 mm, tl. 78 mm ( MNHN Th 1419) . Paratypes: same locality, 1, cl. 30 mm, tl. 78 mm ; 1, cl. 21 mm, tl. 56 mm ( MNHN Th 1427) ; stn 23, W of Haamamao Bay , rocky coast with sand and pebbles, in sand, 1, cl. 13.5 mm, tl. 35 mm ( MNHN Th 1428) .

ETYMOLOGY. — The new species is named for Jean

Thalassinidea (Crustacea, Decapoda ) from French Polynesia

OTHER MATERIAL EXAMINED. — Neaxius acanthus (A. Milne-Edwards, 1879) : New Caledonia. Lectotype (dried) (selected by Sakai & de Saint Laurent 1989), cl. 26 mm, tl. 74.5 mm ( MNHN Th 812); paralectotype ,, cl. 27 mm, broken, poor condition, all pereopods lost except P2 (A2 Fig. 7L, M ) ( MNHN Th 190) .

DISTRIBUTION. — Only known from the type locality. DIAGNOSIS. — Carapace with bifid rostrum, lateral rostral margin with three or four spines, lateral carina of gastric region unarmed; anterolateral border of carapace with three or four spines. Telson with three prominent transverse carina on dorsal surface, equally distant from one another.

Article 2 of A2 peduncle with one or two upper spines, unarmed laterally; antennal acicle large, distally acute with five or six lower spines. No posterior seta on exopod of Mx2. Mxp3 with four or five lower spines on merus, lower distal spine on carpus.

P1 unequal, ischium with two or three lower spines; merus with two or three upper spines, three or four spines on proximal half of lower border; carpus with lower proximal spine. P2 with lower spine on ischium. Plp1 present in female, simple, faintly biarticulated. Plp1 absent in male, male Plp2 without appendix masculina. Plp 2-5 in male and female with broad rami and digitiform appendix interna. Uropodal exopod with proximal dorsal spine, 10-11 spines on posterior margin, no suture; endopod with large spine on posterolateral angle, two to four spines on median longitudinal carina and two or three spines on posterolateral border.

DESCRIPTION

Figures

FIG. 6. — Neaxius trondlei n. sp., Marquesas; A, I, holotype, (MNHN Th 1419); B, G, H, paratype (MNHN Th 1427); C-F, paratype (MNHN Th 1427); A, anterior part of carapace; B, lateral view; C, maxilla; D, antenna; E, F, major and minor

FIG. 7. — A-K, Neaxius trondlei n. sp., Marquesas; A-I, paratype (MNHN Th 1427); J, K, holotype, (MNHN Th 1419); A-D, pereopod 2-5; E, F maxilliped 1 and 2; G, H, maxilliped 3 and ischium in mesial view; I, mandible; J, telson and uropods; K, pleopod 3; L, M, Neaxius acanthus (A. Milne-Edwards, 1879), paralectotype (MNHN Th 190), antenna in lateral and dorsal view. Scale bars: