Smaraldia springthorpei, Lowry & Stoddart, 2012

Lowry, J. K. & Stoddart, H. E., 2012, The Pachynidae fam. nov. (Crustacea: Amphipoda: Lysianassoidea) 3246, Zootaxa 3246 (1), pp. 1-69 : 61-62

Smaraldia springthorpei sp. nov.

( Figs 42 , 43 )

Type material. HOLOTYPE, female, 4.3 mm, AM P.39217, rocks near Migo Island, Port Harding, Torbay Bay , Western Australia, 35°04'S 117°39'E, 6–7 m, small branched alga with compound tunicate on underside of branches, 15 December 1983, R. T. Springthorpe & J.K. Lowry, stn WA-152 . PARATYPE, female, 4 mm, AM P.39218, Burnie , Tasmania, Australia, 41°04'S 145°54'E, 2 m, rocky bottom, 24 June–11 July 1985, D.A. Ritz .

Type locality. Rocks near Migo Island, Port Harding , Torbay Bay , Western Australia, Southern Ocean , 35°04'S 117°39'E, 6–7 m depth .

Etymology. Named for Roger Springthorpe, who collected many of the species used in our lysianassoid studies and has made all of the plates.

Description. Head lateral cephalic lobe large, broadly rounded; ventral margin curved. Antenna 1 peduncular article 1 without posterodistal spine; accessory flagellum 2-articulate, article 1 long; flagellum with strong 1-field callynophore in female, [male not known]. Mandible lacinia mobilis absent; lamina dentata absent; accessory setal row absent; molar absent; palp attached distally; palp article 2 broad, as long as article 3; article 3 tapered distally. Maxilla 1 outer plate with 7 setal-teeth in 4/3 arrangement, setal-teeth smooth; palp absent. Maxilliped inner plate absent; outer plate medium size; palp 4-articulate, article 4 large. Gnathopod 1 subchelate; ischium smaller than propodus, not swollen posteroproximally; carpus extremely compressed; propodus length about 1.8 × breadth, posterior margin absent, palm with produced corner, corner of palm without robust seta; dactylus reaching to corner of palm. Gnathopod 2 palm minute, obtuse. Pereonite 4 without dorsal spines. Pereonite 5 without dorsal spines. Pereopod 5 merus with posteroproximal shoulder. Pereopod 6 basis with posteroventral lobe weakly produced; merus as broad as long, without posteroproximal shoulder. Pereopod 7 basis subovate with posterior margin smooth. Epimeron 3 posterior margin without projections, posteroventral corner broadly rounded. Uropod 3 biramous, inner ramus extending less than halfway along outer ramus. Telson longer than broad, entire.

Distribution. Southern Australia, Southern Ocean; 2–7 m depth.

Figures

FIGURE 42. Smaraldia springthorpei sp. nov. Holotype female, 4.3 mm, AM P.39217, Migo Island, Torbay Bay, Western Australia; whole animal, paratype, 4.0 mm, AM P.39218, Burnie, Tasmania. Scales represent 0.1 mm.

FIGURE 43. Smaraldia springthorpei sp. nov. Holotype female, 4.3 mm, AM P.39217, Migo Island, Torbay Bay, Western Australia. Scales represent 0.2 mm.