Clepidecrella ira, 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 : 10-14

Clepidecrella ira sp. nov.

( Figs 10–12 )

Type material. HOLOTYPE, female, 3.2 mm, MV J61499 , south of Point Hicks , Victoria, Australia, 38°16.40'S 149°27.60'E, 800 m, coarse shell, biogenic sediments, WHOI epibenthic sled, 23 July 1986, M.F. Gomon et al., RV Franklin, stn SLOPE 34 . PARATYPES: 10 specimens, AM P.82599 and 10 specimens, MV J61500 , same data as holotype ; 1 specimen, MV J61501 , south of Point Hicks , Victoria, Australia, 38°21.90'S 149°20.00'E, 1000 m, WHOI epibenthic sled, 23 July 1986, G.C.B. Poore et al., RV Franklin, stn SLOPE 32 ; 3 specimens, MV J61502 , off Freycinet Peninsula , Tasmania, Australia, 41°58.60'S 148°38.80'E, 500 m, coarse shell, WHOI epibenthic sled, 27 July 1986, M.F. Gomon et al., RV Franklin, stn SLOPE 47 .

Type locality. South of Point Hicks , Victoria, Australia, 38°16.40'S 149°27.60'E, 800 m depth .

Etymology. Named for the wooden schooner Ira which went ashore in gale conditions on Ninth Island, Bass Strait in 1868.

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 1.5 x breadth. Gnathopod 1 basis margins subparallel; ischium short, length 1.5 x breadth; carpus long, length 3 x breadth, longer than (1.4 x) propodus; propodus tapered distally, length 2.7 x breadth. Pereopods 3 and 4 propodus with short distal locking seta. Pereopod 5 basis expanded posteroventrally, with posteroventral lobe; merus moderately expanded posteriorly. Pereopod 7 basis with posteroventral lobe extending about halfway along merus; merus posteroventral lobe extending less than halfway along carpus. Pleonite 3 without dorsodistal boss. Epimeron 3 posteroventral corner narrowly rounded. Uropod 1 rami with robust setae. Uropod 3 biramous; inner ramus about 0.7 x outer ramus; outer ramus 1-articulate. Telson longer than broad, length about 1.1 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 ira can be distinguished from C. cataraqui and C. colliboi as discussed under those species.

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

Distribution. South-eastern Australia, in 500–1000 m depth.

Figures

FIGURE 10. Clepidecrella ira sp. nov. Holotype female, MV J61499, south of Point Hicks, Victoria.

FIGURE 11. Clepidecrella ira sp. nov. Holotype female, MV J61499, south of Point Hicks, Victoria. Scales for MX1, MX2, U3, T represent 0.05 mm; remainder represent 0.1 mm.

FIGURE 12. Clepidecrella ira sp. nov. Holotype female, MV J61499, south of Point Hicks, Victoria. Scales represent 0.2 mm.