Neastacilla attenuata (Hale)

King, R. A., 2003, Neastacilla Tattersall, 1921 redefined, with eight new species from Australia (Crustacea: Isopoda: Arcturidae), Memoirs of Museum Victoria 60 (2), pp. 371-416 : 376

Neastacilla attenuata (Hale)

Astacilla attenuata Hale, 1946: 177–179 , figs 9–10.— Monod,

1970: 1137–1139, figs 45–55.— Poore et al., 2002: 258.

Diagnosis of female. Eyes small and oval. Head with dorsal pair of small anteriorly directed spine-like elevations slightly posterior to eyes; lateral margin of head and pereonite 1 incised. Pereonites 2 and 3 with single dorsal, anteriorly direct- ed spine-like elevations. Pereonite 4 extremely elongate (more than 10 times as long as pereonite 3); anterolateral margins expanded, with pair of small blunt anterodorsal elevations. Pleon longer than pereonites 5–7 combined, 2 pairs of small lateral wings present, apex acute. 7.5 mm.

Male. Similar to female except dorsal spines are reduced to blunt elevations on head and pereonites. 9.8 mm.

Distribution. Australia: New South Wales; 60– 80 m.

Remarks. This species is diagnosed from the description of Hale (1946). This species is distinguished from other species by the presence of anteriorly directed spine-like dorsal elevations in the female, the elongate pereonite 4 (extremely elongate in males), and long pleon.