Neastacilla kanowna, King, 2003

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 : 384-389

publication ID	https://doi.org/ 10.24199/j.mmv.2003.60.29
persistent identifier	https://treatment.plazi.org/id/03932060-FFDA-FF9A-FCAB-F9FDFB217E2A
treatment provided by	Felipe
scientific name	Neastacilla kanowna
status	sp. nov.

Treatment

Neastacilla kanowna View in CoL sp. nov.

Figures 9–11 View Figure 9 View Figure 10 View Figure 11

Material examined. Holotype. Australia: Vic., Oberon Bay , 39º04.2’S, 146º19.4’E, 21 m, 5 Feb 1982, NMV J3418 About NMV (1 female, 14 mm). GoogleMaps

Paratypes. Australia: Vic. type locality, NMV J3213 About NMV (2 females, 15–16 mm; 2 males, 13.5–15 mm), NMV J3214 About NMV (1 male, 14 mm), NMV J40679 About NMV (1 male, 10.5 mm), NMV J40680 About NMV (6 females, 13–15 mm; 7 males, 11–15.5 mm; 2 immature females, 9.0– 9.5 mm; 1 immature male, 11 mm). Swan Bay , 38º14.0’S, 144º39.0’E, 4 m, 26 Feb 1991, NMV J20908 About NMV (1 female, 13 mm). Eastern Bass Strait, 38º15.0’S, 147º22.5’E, 16 m, 31 Jul 1983, NMV J8820 About NMV (1 female, 13.5 mm; 1 male, 11 mm; 1 immature female, 10 mm; 1 immature male stage 1, 7.5 mm). Tas. Central Bass Strait, off Three Hummock I., 40º31.1’S, 145º04.0’E, 29 m, 3 Nov 1980, NMV J8819 About NMV (1 male, 15.5 mm). SA. Flinders I., 33º40.50’S, 134º22.0’E, 20 m, 19 Apr 1985, NMV J16578 About NMV (1 male, 15 mm) GoogleMaps .

Description of female. Head without dorsal elevation, anterolateral lobes rounded, small rostral point present; lateral margin of the head and pereonite 1 not incised. Pereonite 1without anterolateral expansion. Pereonites 2 and 3 similar width, without dorsal elevations, without lateral extensions. Pereonite 4 about 9 times as long as pereonite 3, without dorsal elevations, small anterolateral extensions present, slightly wider than pereonites 2 and 3. Pereonites 5–7 progressively shorter posteriorly, without dorsal elevations. Pleon length greater than combined lengths of pereonites 5–7, without dorsal elevations, with small proximal lateral wings, apex truncated.

Eyes small and subtriangular. Antenna 1 reaching to the distal edge of the second peduncular article of antenna 2; aesthetascs present distally and laterally on flagellum. Antenna 2 slender, more than half as long as body; flagellum of 3 articles plus claw, with 2 rows of scales along full length.

Maxilla 1 mesial lobe with 3 terminal setae; lateral lobe with 11 robust setae. Maxilla 2 mesial lobe with 22 setae; middle lobe with 7 setae; lateral lobe with 3 setae. Maxillipedal endite with 14 mesial setae; 1 coupling hook; palp article 2 with mesial setal rows; article 3 with mesial setal and lateral setal rows; articles 4 and 5 with mesial and lateral setal rows; article 5 with mesial and distal setae.

Pereopod 1 propodus shorter than carpus; dactylus almost twice as long as wide, without unguis. Pereopods 2–4 with dactylus. Pereopods 5–7 dactylus not denticulate, with unguis and secondary unguis; secondary unguis greater than half length of primary unguis. Uropod exopod with 5 setae. Oostegite 4 with sutured small posterior lobe.

10–16 mm.

Male. Smaller than female but similar morphologically. Pereonites, mouthparts, pereopods all as for female.

Pleopod 1 exopod with lateral notch and 2 plumose lateral setae of equal lengths. Pleopod 2 appendix masculina with ridge on posterior face, with fine setae, curved, and extending quarter length past endopod, apex simple. Penial plate widened proximally, distally bulbous with fine setae, apex with shallow notch.

7.5–15 mm.

Distribution. Australia: Victoria, Tasmania, South Australia; subtidal.

Etymology. “Kanowna ” is an Australian Aboriginal name for the sea.

Remarks. This species is most easily distinguished from all other species of Neastacilla by its large adult size (around 15 mm), unornamented body and truncate pleotelson. The presence of five setae on the uropodal exopod distinguishes this species from all other Australian species of Neastacilla , which generally have two or three apical setae.