Coboldus mberensis, Lowry & Myers, 2003

Lowry, J. K. & Myers, A. A., 2003, New Amphipod Crustaceans From The Indo-West Pacific (Amathillopsidae: Eusiridae: Iphimediidae), Raffles Bulletin of Zoology 51 (2), pp. 219-256 : 228-229

publication ID	https://doi.org/ 10.5281/zenodo.4619401
persistent identifier	https://treatment.plazi.org/id/2D1A87F3-B84C-FFE2-85B8-FEA5FAF71272
treatment provided by	Carolina
scientific name	Coboldus mberensis
status	sp. nov.

Treatment

Coboldus mberensis View in CoL , new species

( Figs. 9-11 View Fig View Fig View Fig )

Material examined. – Holotype – sex unknown, 4.8 mm, AM P46996, Grand Recif , Mbere, New Caledonia, 22 19.9’S 166 13.24’E, coral rubble on steep slope, 12 to 25 m, coll. J. K. Lowry, 21 Nov.1995, stn NCL-154. GoogleMaps

Paratype – sex unknown, same station data.

Type locality. – Mbere, Grand Recif, South-east Lagoon, New Caledonia.

Description. – Head laterocephalic margin without spine, ventrolateral corner narrowly rounded. Antenna 1 peduncular article 1 with anterodistal spines, without posteroventral spine; peduncular article 2 without posterodorsal spine, without posteroventral spine; accessory flagellum absent. Maxilla 1 palp reduced, shorter than outer plate, 1-articulate.

Pereon. Pereonite 1 enlarged. Gnathopod 1 coxa small, ventrally subacute, ventral margins smooth. Gnathopod 2 coxa small, ventrally truncated, ventral margins smooth.

Pereopod 3 coxa posteroventrally subacute, ventral margins smooth. Pereopod 4 coxa ventral margins smooth. Pereopod 5 coxa posteroventral corner broadly rounded; basis posterodorsal corner with spine, posterior margin without spines, smooth, posteroventral corner rounded; merus posterodistal lobe as long as or longer than carpus. Pereopod 6 coxa posteroventral corner subquadrate; basis posterodorsal corner with spine, posterior margin without spines, smooth, posteroventral corner without spines, rounded; merus posteroventral lobe produced about halfway along carpus, or as long as or longer than carpus. Pereopod 7 coxa subquadrate; basis posterodorsal corner rounded, posterior margin without spines, smooth, posteroventral corner with small spine; merus posteroventral lobe produced about halfway along carpus, or as long as or longer than carpus. Pereonite 7 without mid-dorsal carina, dorsodistal margin not produced, without spines.

Pleon. Pleonite 1 without mid-dorsal carina, dorsodistal margin strongly produced, shield-like, without spines. Pleonite 2 without mid-dorsal carina, dorsodistal margin slightly to strongly produced, with 2 large spines. Pleonite 3 without mid-dorsal carina, dorsodistal margin slightly to strongly produced, with 2 straight spines. Epimeron 1 posterior margin without mid-lateral spines, posteroventral corner subquadrate. Epimeron 2 posterior margin with 1 midlateral blunt spine, posteroventral corner produced into a blunt spine. Epimeron 3 posterior margin with 1 ventrolateral, straight, smooth spine, posteroventral corner produced into a blunt, smooth spine. Telson notched, slightly longer than broad, parallel sided, with pair of dorsodistal fine setae.

Remarks. – This species is unusual among iphimedioids in having pereonite 7 dorsal margin without carina or spines. No other known iphimedioid species has the character combination of a huge single shield-like dorsal spine on pleonite 1 and an untoothed dorsum on pereonite 7.

Distribution. – New Caledonia.

Etymology. – Named for Mbere, the type locality.