Campylaspis chisamerai, 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 : 10-11

Campylaspis chisamerai sp. nov.

Fig. 6

Holotype adult ♂, 3.55 mm, P.64735, Australia, NSW, northeast of Long Reef , -33.68° 151.88°, 366 m, 5 Dec 1977, FRV Kapala , K77-23-03, in AM.

Etymology. The species is named in honour of my colleague, Dr Gabriel Chişamera, reknown specialist in birds and small mammals, as a sign of sincere friendship.

Diagnosis. Carapace, 0.48 entire body length, covered with numerous tubercles placed either side of mid-dorsal ridge; maxilliped 2 with 2 small tubercles on carpus, 1 tooth on distal margin of propodus, short dactylus; pereopod 2 with digitiform dactylus; uropodal peduncle 2.1 pleonite 6 length, equal rami.

Description. Carapace, 0.48 body length, 1.86 as long as high, 1.58 as long as wide; lateral sulcus without posterior limit, transverse ridge in anterior part; carapace covered with numerous tubercles placed on each side of the mid-dorsal ridge; small antennal notch; smooth ventral margin; very small eyelobe without lenses; pseudorostrum 0.2 carapace length ( Fig. 6 A,B ). — Pleonites each with a mid-dorsal ridge, lateral ridge on each side of pleonites 1–5, pair of small tubercles on each side of pleonites 5 ( Fig. 6 B ). — Antenna 1 peduncle article 1 1.25 rest of article’s length; article 2 1.1 article 3 length; main flagellum 2.7 article 3 length; accessory flagellum with 1 article; aesthetascs 0.3 main flagellum length. ( Fig. 6 C ). — Maxilliped 1 basis with 2 simple setae on process; carpus with 2 simple setae; dactylus with 1 simple seta ( Fig. 6 D ). — Maxilliped 2 basis with 1 simple and 1 pappose seta; merus 3 ischium length, with 1 plumose seta; carpus as long as merus, with 2 tubercles and 1 simple seta; propodus with 1 simple seta and 2 teeth: short dactylus fused with 3 terminal teeth, central tooth shorter ( Fig. 6 E ). — Maxilliped 3 basis 0.9 rest of article’s length, with 3 plumose setae plumose setae; ischium 2 simple setae; merus 2 ischium length, with 1 simple and 1 plumose seta; carpus 0.6 merus length, with 1 plumose and 3 simple setae; propodus 1.5 carpus length, with 1 plumose and 2 pappose setae; dactylus 0.5 propodus length, terminal seta 3 dactylus length; with exopod ( Fig. 6 F ). — Pereopod 1 basis 0.75 rest of article’s length, with 1 pappose and 2 simple setae; ischium with 1 pappose seta; merus 2.4 ischium length, with 4 simple, 1 pappose and 1 plumose seta; carpus 0.88 merus length, with 3 simple, 1 simple and 1 pappose seta; propodus 1.26 carpus length, with 2 simple and 3 pappose setae; dactylus 0.73 propodus length, with 6 simple and 1 plumose seta; with exopod ( Fig. 6 G ). — Pereopod 2 basis 0.47 rest of article’s length, with 1 simple and 2 pappose setae; merus 3.7 ischium length, with 1 simple and 1 pappose seta; carpus 1.8 merus length, with 1 simple, 1 plumose and 1 pappose seta; dactylus with short digitiform tip, 3 plumose and 5 simple setae; with exopod ( Fig. 6 H ). — Pereopod 3 basis 1.32 rest of article’s length; ischium and merus with 1 plumose seta; carpus and propodus with 1 annulate seta; dactylus fused with terminal robust seta; with exopod ( Fig. 6 I ). — Pereopod 4 basis 0.8 rest of article’s length, with 1 plumose seta; merus 2 ischium length, with 1 plumose seta; carpus 2 merus length, with 1 plumose and 1 annulate seta; propodus 0.8 carpus length, with 1 annulate seta; dactylus fused with terminal robust seta; with exopod ( Fig. 6 J ). — Pereopod 5 basis 0.55 rest of article’s length; merus 2 ischium length, 1 plumose seta; carpus 2 merus length, propodus with 1 annulate seta; dactylus with 1 subterminal seta, fused with terminal robust seta ( Fig. 6 K ). — Uropod peduncle 2.1 pleonite 6 length, serrate margins, 1.9 endopod length; exopod as long as endopod, with serrate margins, 2 simple and 1 microserrate subterminal seta; endopod with 2 simple, 1 microserrate and 1 terminal microserrate robust seta 0.68 endopod length ( Fig. 6 L ).

Remarks. Campylaspis chisamerai sp. nov. resembles C. tasmaniensis Petrescu, 2006 in carapace ornamentation (fewer and larger tubercles), and similar sulcus (with transverse ridge on C. chisamerai ). It differs in the carapace to last pleonite having a dorsal crest; a shorter merus of the 3rd maxilliped with its dactylus having a short terminal seta instead of very long one in C. tasmaniensis , and a shorter dactylus of the pereopod 2.

Distribution. Australia: NSW—north east of Long Reef, at 366 m depth.

Figures

Figure 6. Campylaspis chisamerai sp. nov. Holotype subadult male (A) body, lateral view; (B) carapace, dorsal view; (C) antenna 1; (D) maxilliped 1; (E) maxilliped 2; (F) maxilliped 3; (G) pereopod 1; (H) pereopod 2; (I) pereopod 3; (J) pereopod 4; (K) pereopod 5; (L) uropod. Scales: A,B 1 mm; C 0.2 mm; D,E 0.25 mm; F–L 0.5 mm.