Campylaspis hangiuae, Petrescu, 2018

Petrescu, Iorgu, 2018, On the Family Nannastacidae (Crustacea, Cumacea) from the Australian Museum Collection, Records of the Australian Museum 70 (1), pp. 1-111 : 16

Campylaspis hangiuae sp. nov.

Fig. 15

Holotype subadult ♀, 3.33 mm, P.88264, Australia, NSW, east of Long Reef , -33.72° 151.77°, 174 m, epibenthic sled, 20 Dec 1985, J.K. Lowry, R. T. Springthorpe, FRV Kapala , K85-21-08, in AM.

Etymology. The species is named in honour of Anca Hangiu, pharmacist, as a sign of gratitude for her generous help regarding my health condition.

Diagnosis. Carapace, 0.5 body length, large lateral depression with a transverse ridge in anterior part, long lateral groove under the depression; pereopod 1 with robust articles; pereopod 2 dactylus with digitiform tip; uropod peduncle 2 pleonite 6 length, 2.4 endopod length, exopod 0.82 endopod.

Description. Carapace 0.5 body length, about 2 as long as high, 1.25 as long as wide; small antennal notch; oblique anterior margin; smooth ventral margin; dorsal margin with 2 large elevated areas delimiting a dorsal plateau and a large lateral sulcus with a transverse ridge in anterior part; long lateral groove under the depression; small eyelobe without lenses; pseudorostrum 0.3 carapace length ( Fig. 15 A, B ). — Antenna 1 peduncle with robust articles, article 1 0.8 rest of article’s length; main flagellum 1.28 article 3 length; accessory flagellum with 1 article; aesthetascs as long as main flagellum ( Fig. 15 C ). — Maxilliped 3 basis 0.55 rest of article’s length, with 2 plumose setae; ischium 0.22 basis length; merus 4.8 ischium length, serrate medially, with 3 teeth and 1 plumose seta; carpus 0.2 merus length, with 2 simple and 1 plumose seta; propodus 1.2 carpus length, with 3 pappose setae; dactylus 0.5 propodus length, with 4 simple setae; with exopod ( Fig. 15 D ). — Pereopod 1 with robust articles, basis 0.75 rest of article’s length, with 2 plumose setae; ischium 0.16 basis length, with 1 plumose seta; merus 2.6 ischium length, with 1 simple and 2 plumose setae; carpus 0.73 merus length, with 3 plumose setae; propodus 0.88 carpus length, with 5 plumose setae; dactylus 0.75 propodus length, with 5 simple setae; with exopod ( Fig. 15 E ). — Pereopod 2, robust articles, basis 0.5 pereopod length, serrate in posterior half and 1 plumose seta, serrate, with 2 plumose and 2 simple setae; ischium with 1 plumose seta; merus 2.5 ischium length, with 1 plumose seta; carpus 1.75 merus length, with 4 plumose setae; dactylus 3 propodus length, with 7 simple setae and digitiform tip; with exopod ( Fig. 15 F ). — Pereopod 3, basis 1.16 rest of article’s length, 1 short simple seta; ischium 0.17 basis length, 1 short simple seta; merus 1.1 ischium length, 1 short simple seta; carpus 2 merus length, 2 short simple setae; propodus 0.25 carpus length, with 1 short seta; dactylus fused with short terminal seta ( Fig. 15 G ). — Pereopod 4, basis 0.77 rest of article’s length, 1 simple seta; ischium 0.25 basis length, 1 short simple seta; merus 1.5 ischium length, with 1 short simple seta; carpus as long as merus, with 1 short simple seta; propodus 0.5 carpus length, 1 simple seta; dactylus fused with robust terminal seta ( Fig. 15 H ). — Pereopod 5, basis 0.36 rest of article’s length; ischium 0.36 basis length, with 1 short simple seta; merus 1.8 ischium length; carpus 1.6 merus length, 1.06 basis length; propodus 0.33 carpus length; dactylus fused with robust terminal seta ( Fig. 15 I ). — Uropod, robust articles, peduncle 2 as long as pleonite 6, strongly toothed margins, 2.4 endopod length; exopod 0.82 endopod, serrated lateral margin, 1 seta on margin, terminal robust seta: endopod with 3 medial microserrate setae, terminal robust seta ( Fig. 15 J ).

Remarks. Campylaspis hangiuae sp. nov. has a large and long lateral sulcus reminiscent of C. edenensis Petrescu, 2006 , C. berentsae sp. nov. and C. vasilescui sp. nov.; it has the pereopod 2 dactylus without a digitiform tip as in C. berentsae (with process in C. edenensis and C. vasilescui ); it differs from C. berentsae in having the eyelobe without lenses and maxilliped 3 with a bulky carpus; uropod endopod with 5 setae vs. 3 in C. vasilescui .

Distribution. Australia: NSW—east of Long Reef, at 174 m depth.

Figures

Figure 15. Campylaspis hangiuae sp. nov.Holotype female (A) body, lateral view; (B) carapace, dorsal view; (C) antenna 1; (D) maxilliped 3; (E) pereopod 1; (F) pereopod 2; (G) pereopod 3; (H) pereopod 4; (I) pereopod 5; (J) uropod.Scales:A,B 1 mm;C 0.25mm; D–J 0.25 mm.