Clepidecrella cataraqui, Lowry & Stoddart, 2010

Lowry, J. K. & Stoddart, H. E., 2010, Kergueleniidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea) in Australian waters, Zootaxa 2564 (1), pp. 1-30 : 6-7

Clepidecrella cataraqui sp. nov.

( Figs 4–6 )

Type material. HOLOTYPE, female, 3.7 mm, AM P.69002, east of Cape Naturaliste , Tasmania, Australia, 40°45.94’S 149°01.62’E to 40°46.54’S 149°00.27’E, 2400–2500 m, mud, clay, 10 December 1986, R. T. Springthorpe, RV Franklin stn FR1086-04.

Type locality. East of Cape Naturaliste , Tasmania, Australia, 40°45.94’S 149°01.62’E to 40°46.54’S 149°00.27’E, 2400–2500 m depth.

Etymology. Named for the barque Cataraqui lost off King Island in 1845.

Diagnostic description. Antenna 1 peduncular article 1 not or only slightly produced dorsodistally. Mandible incisor present; left lacinia mobilis absent; accessory spine row absent; molar absent. Maxilla 1 outer plate with 3 setal-teeth, setal-teeth without cusps; palp 2-articulate. Maxilliped palp article 2 longer than broad, length 3 x breadth. Gnathopod 1 basis margins subparallel; ischium short, length 1.7 x breadth; carpus long, length 3.1 x breadth, longer than (1.85 x) propodus; propodus subrectangular, length 2.2 x breadth. Pereopods 3 and 4 propodus with long distal locking seta. Pereopod 5 basis expanded posteroventrally, with posteroventral lobe; merus moderately expanded posteriorly. Pereopod 7 basis with posteroventral lobe not extending much beyond ischium; merus posteroventral lobe extending less than halfway along carpus. Pleonite 3 without dorsodistal boss. Epimeron 3 posteroventral corner narrowly rounded. Uropod 1 rami without robust setae. Uropod 3 uniramous; outer ramus 2-articulate. Telson shorter than broad, length about 0.9 x breadth.

Remarks. Clepidecrella cataraqui , C. colliboi and C. ira share the characters of left lacinia mobilis absent and maxilla 1 outer plate with only 3 setal-teeth. Clepidecrella cataraqui can be distinguished from C. colliboi and C. ira by the long distal locking seta on pereopods 3 and 4, the short posteroventral lobe on the basis of pereopod 7, the 2-articulate outer ramus on uropod 3 and the shorter than broad telson.

The holotype female has a non-setose oostegite on pereopod 5 only.

Distribution. South-eastern Australia, in 2400–2500 m depth.

Figures

FIGURE 4. Clepidecrella cataraqui sp. nov. Holotype female, AM P.69002, east of Cape Naturaliste, Tasmania.

FIGURE 5. Clepidecrella cataraqui sp. nov. Holotype female, AM P.69002, east of Cape Naturaliste, Tasmania. Scales for MX1, MX2, U3, T represent 0.05 mm; remainder represent 0.1 mm.

FIGURE 6. Clepidecrella cataraqui sp. nov. Holotype female, AM P.69002, east of Cape Naturaliste, Tasmania. Scales represent 0.2 mm.