Natatolana gorung Bruce, 1986

Keable, Stephen J., 2006, Taxonomic Revision of Natatolana (Crustacea: Isopoda: Cirolanidae), Records of the Australian Museum 58 (2), pp. 133-244 : 182

Natatolana gorung Bruce, 1986

Natatolana gorung Bruce, 1986: 66 , figs. 42, 43.–Springthorpe & Lowry, 1994: 46.– Brusca et al., 1995: 80.– Bruce et al., 2002: 150.

Type material. Holotype: 3, 14.5 mm, NMV J1340 (not examined) . Paratype: AM P24324 (examined). Type locality: Port Phillip Bay , Victoria, Australia, 38°19'S 144°47'E .

Material examined. New South Wales: 3 adults, manca, AM P38673, Middle of Spring Cove, North Harbour, Port Jackson , baited trap, 15 m, S. Keable, D. Townsend, J. Lowry, 16–17 Jul. 1988; series from Bate Bay , Pioneer Cement / The Ecology Lab. EIS Study, AM P47277–47281, baited trap, 1991 : 100 specimens, S1R1 E deep; 3 specimens, S1R1 deep; 30 specimens, S2R1 deep; 97 specimens (2 vials), S1R2 E deep; same study off Providential Head, 62 m; series from Jervis Bay , CSIRO Baseline Studies, P. Hutchings et al. AM, corer, AM P47271–47276 ; 1 specimen, site 4#5, 25 May, 1990; 1 specimen, site 4#2, 5 Jun. 1990; 5 mancas, site 6#3, Aug. 1989; manca, site 6#2, 5 Jun. 1989; manca, site 4#2, Jun. 1989; manca, site 6, Aug. 1989.

Diagnosis. Eyes: vestigial. Interocular furrow: well developed, forming a ridge that runs across the cephalon and deflects anteriorly towards the midpoint. Frontal lamina: lateral margins straight, parallel. Antenna: c. 0.25× as long as body, reaching to posterior of pereonite 1. Coxal plates: furrows variously developed, strongly developed on pereonite 1 and coxae 2–3, absent on coxae 4–6, weakly developed on coxa 7. Pleonite 4: apex forming a broad acute point. Pleotelson: broad, length 0.83× basal width; anterodorsal depression absent; anterolateral margins almost straight and angling posteriorly toward the midline; posterolateral margins straight, markedly angled to anterolateral margins and meeting at an obtuse angle; apex not produced, lateral margins converging smoothly to a point; with 10–12 RS. Pereopod 2: propodus with 2 RS on palm. Pereopod 3: propodus without RS on palm. Pereopod 7: basis broad, width 0.55× length; distance between anterior margin and medial carina less than between posterior margin and medial carina; posterior margin with setae proximally and distally but not medially. Penes: absent. Pleopod 2 appendix masculina: extending subequal with tip of endopod, 0.96× length of endopod; slender; margins straight; apex bent laterally slightly, bluntly rounded. Uropods: exopod short, 0.75× the length of the endopod.

Size. Adults to 18.6 mm.

Remarks. The incomplete interocular furrow formed into a distinct ridge is sufficient to distinguish Natatolana gorung from all other species in the genus.

Distribution and ecology. Australia: New South Wales: Port Jackson; off Sydney; Jervis Bay. Victoria: Port Phillip Bay. To depths of 66 m. Scavenger.