Nannastacus inflatus Hale, 1945

Petrescu, Iorgu, 2018, On the Family Nannastacidae (Crustacea, Cumacea) from the Australian Museum Collection, Records of the Australian Museum 70 (1), pp. 1-111 : 36

Nannastacus inflatus Hale, 1945

Fig. 41

Nannastacus gibbosus .— Hale, 1936: 432.

Nannastacus zimmeri Hale, 1936: 432 .

Nannastacus inflatus Hale, 1945: 159 .— Băcescu, 1992: 238. Petrescu, 1997a: 139. Stoddart & Lowry, 2003: 416.

Material examined: 2♀♀, 8♂♂, P.64577; 2♀♀, P.90697; 1♀, P.64587; 1♂, P.90691; 4♀♀, 1 subadult ♂, P.64595; 1♀, P.64597; 3♀♀, P.90694; 24♀♀, 10♂♂, P.64611; 8♀♀, 5♂♂, P.64612; 1♀, P.64694; 3♀♀, P.64697; 1♂, P.64699; 1 subadult ♂, P.90692; 1♀, P.64761; 1♀, P.90690; 3♀♀, P.90696; 3♀♀, P.64790; 1♀, P.64837; 3♂♂, P.90698; 4, P.64843; 1♀, P.64851; 10♀♀, 11♂♂, P.90695; 2♀♀, 1♂, P.65077; 2♀♀, P.90693; 1♂, P.90991; 2♀♀, P.65603.

Description of male. Body length 2.9 mm. —Carapace 1.6 as long as high, 1.6 as long as wide, with numerous small, distally dilated granules; pseudorostrum 0.4 carapace length, small elevation behind the eyes ( Fig. 41 A–C ). — Antenna 1 peduncle article 1 as long as rest of articles; article 2 with 3 pedunculate setae on process; article 3 1.15 article 2 length; main flagellum 0.6 article 3 length; accessory flagellum with 1 article; asthetascs 2.7 main flagellum length ( Fig. 41 D ). — Maxilliped 3 basis as long as rest of article’s length, with 4 plumose setae; merus 4 ischium length, with 1 pappose and 1 plumose seta; carpus 0.9 merus length, with 3 plumose setae; propodus 0.8 carpus length, with 1 plumose seta; dactylus 0.4 propodus length, with 2 simple and 2 pectinate setae; with exopod ( Fig. 41 E ). — Pereopod 1 basis 0.6 rest of article’s length, with hyaline crest; merus 1.7 ischium length; carpus 1.8 merus length, with 3 simple setae; propodus 0.9 carpus length, with 5 simple setae; dactylus 0.6 propodus length, with 4 simple setae; with exopod ( Fig. 41 F ). — Pereopod 2 basis 1.25 rest of article’s length, with hyaline crests; merus 2.6 ischium length, with 1 simple seta; carpus 1.5 merus length, with 2 simple setae; dactylus 2.5 propodus length, with 5 simple setae; with exopod ( Fig. 41 G ). — Pereopod 3–5 with decrasing basis and increasing carpus; dactylus fused with terminal robust simple seta ( Fig. 41 H–J ). — Uropod peduncle 0.8 pleonite 6 length, 0.3 endopod length; endopod 7.7 exopod length, with 7 setae medially and 1 terminally short simple seta ( Fig. 41 K ).

Remarks. Our males differ from Hale’s specimens in: maxilliped 3 basis shorter than in original description; pereopod 1 propodus 0.9 vs. as long as carpus in Hale.

Distribution. Australia —WA, SA and QLD, and India, at 0–7 m depth ( Băcescu, 1992); and Indonesia ( Petrescu, 1997a). Now known from NT and VIC, and from greater depths, to 85 m in Bass Strait ( Petrescu, 2018).

Figures

Figure 41. Nannastacus inflatus Hale, 1945 Male (A) body, lateral view; (B,C) carapace integument, detail; (D) body, dorsal view; (E) antenna 1; (F) maxilliped 3; (G) pereopod 1; (H) pereopod 2; (I) pereopod 3; (J) pereopod 4; (K) pereopod 5; (L) uropod. Scales:A,B 0.5 mm; D 0.1 mm; E,F 0.2 mm; G–J 0.3 mm; K 0.3 mm.