Globosolembos clavicornis, Myers, 1998

Myers, Alan A., 1998, The Amphipoda (Crustacea) of New Caledonia: Aoridae, Records of the Australian Museum 50 (2), pp. 187-210 : 195

Globosolembos clavicornis n.sp.

Figs. 6-7

Type material. HOLOTYPE male, 2.5 mm, AM P52758, Grand Recif Mbere, 22°19.90'S 166°13.24'E, steep slope, coarse rubble, 10-12 m depth, J.K. Lowry, 21 November 1995, NCL-156 . PARATYPES, 10 00, 9 ¥¥, 4 immature, AM P52759, NCL-156 .

Diagnosis. Male 2.5 mm, female 2.8 mm. Male pereon lacking sternal processes. Head lateral lobes only moderately produced; eye moderately large situated moderately deep. Antenna 1 a little shorter than body length; peduncular articles in the basi-distal length ratios 7:9:3; articles 2-3 ventral margin with long stout setae; accessory flagellum composed of one long and one rudimentary terminal article; primary flagellum article 1 ventral margin with a few long stout setae, remaining articles poorly setiferous; flagellum longer than peduncle, with about 15 articles. Antenna 2. robust, subpediform, about one half length of antenna 1; peduncular articles 4 and 5 subequal in length, but article 4 distinctly broader, both articles strongly setiferous, the ventral margins with long, stout setae; flagellum shorter than peduncular article 5, with 6 articles, each with a long ventrodistal strong seta. Mouthparts of typical Globosolembos structure; mandible palp article 3 shorter than 2, subovoid, posterior margin with a few long marginal setae and an understory of short, stout setae. Male gnathopod 1 weakly setiferous; coxa produced forward, rounded; basis stout, excavate on anterior outer face for reception of carpus when folded; carpus subtriangular, cup-shaped, about as broad as long; propodus subround, palm evenly convex, defined by an obtuse angle and a strong seta; dactylus strong, falcate. Female gnathopod 1 similar to that of male, but palm sinuous, produced into a right angle. Gnathopod 2 coxa subrectangular, rounded; basis elongate, anterior margin weakly concave; carpus subtriangular, nearly twice as long as broad; propodus subrectangular, subequal in length with carpus, palm oblique, evenly convex, defined by a stout seta; dactylus short. Pereopods 3-4 dactylus about twothirds length of propodus. Pereopods 5-7 in the length ratios 3:4:6. Epimera posteroventral corner rounded; epimera 1-2 with a few plumose setae on the ventral margin. Uropod 1 peduncle longer than outer ramus and with strong distoventral spine, one halflength of peduncle; inner ramus a little longer than outer, each ramus with a single marginal stout seta. Uropod 2 pequncle shorter than inner ramus and with strong distoventral spine, over one half length of peduncle; inner ramus distinctly longer than outer, each ramus with a single marginal stout seta. Uropod 3 rami very reduced and shorter than peduncle, subequal in length, lacking marginal setae, but with long terminal setae. Telson dorsolateral crests each with a pair of unequal slender setae.

Ovigerous females with 1- 2 eggs.

Remarks. In its diminutive size, short article three of the mandibular palp and reduced uropod 3 rami, this species resembles G. tiafaui Myers from We~tern Samoa. It differs from that species and indeed from all other known Globosolembos species, by the strong stout setae on antenna 2.

Habitat. In coral rubble, 10-12 m.

Distribution. Known only from the type locality.

Etymology. From the Latin clavus = spike and cornus = horn, referring to the spiky appearance of antenna 2.

Figures

Figure 6. Globosolembos clavicornis n.sp. Grand Recif Mbere, Noumea Lagoon, New Caledonia, NCL-156.

Figure 7. Globosolembos clavicornis n.sp. Grand Recif Mbere, Noumea Lagoon, New Caledonia, NCL-156.