Campylaspis popai, 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 : 25

Campylaspis popai sp. nov.

Fig. 30

Holotype ♀, 3.47 mm, P.64648, Australia, NSW, north-east of Port Jackson , -33.73° 151.95°, 820–888 m, beam trawl, 11 Feb 1986, R. T. Springthorpe, FRV Kapala , K86-01-07, in AM.

Etymology. The species is dedicated in honour of my colleague Dr Luis Popa, specialist in molecular biology, as a sign of sincere appreciation of his work.

Diagnosis. Carapace smooth; eyeless ocular lobe; merus of maxilliped 3.03 total length, merus to propodus with teeth on medial margin; pereopod 1 with carpus as long as propodus; dactylus of pereopod 2 with digitiform tip; uropodal peduncle 4.4 pleonite 6 length, 2.4 endopod length, endopod with 7 microserrate setae.

Description. Carapace, large, 0.52 rest of body length, covering almost first 3 pereonites; pseudorostrum 0.22 carapace length; large siphons; ocular lobe without lenses; smooth integument ( Fig. 30 A, B ). — Antenna 1 peduncle article 1 as long as article 3; article 2 0.75 article 3 length; main flagellum 0.8 article 3 length; accessory flagellum with 1 article; aesthetascs 1.1 main flagellum length ( Fig. 30 C ). — Maxilliped 3, basis 0.77 rest of article’s length, with 2 pappose setae; ischium to propodus serrate medially; ischium with 1 plumose seta; merus 0.31 maxilliped length, 3.33 ischium length, with 1 plumose and 7 simple setae; carpus 0.26 merus length, with 1 simple, 2 plumose and 1 pappose seta; propodus 1.1 carpus length, with 2 pappose setae; dactylus 0.6 propodus length, with 5 simple; with exopod ( Fig. 30 D ). — Pereopod 1 basis 0.6 rest of article’s length, 2 simple and 1 plumose seta; ischium with 1 simple and 1 plumose seta; merus 4.4 ischium length, with 1 simple and 3 plumose setae; carpus 0.33 merus length, with 5 plumose setae; propodus 0.9 carpus length, with 2 simple and 3 long plumose setae; dactylus 0.5 propodus length, with 5 simple setae; with exopod ( Fig. 30 E ). — Pereopod 2 basis, 0.39 rest of article’s length, with 1 simple seta; merus 4.3 ischium length, with 1 simple seta; carpus, longest article, 1.15 basis length, 3.3 merus length; dactylus 4.4 propodus length, with digitiform tip, with 8 simple setae; with exopod ( Fig. 30 F ). — Pereopod 3 basis 1.43 rest of article’s length, with 2 setae; merus 2.1 ischium length, with 1 simple seta; carpus 1.8 merus length, with 2 simple setae; propodus 0.33 carpus length, with 2 annulate setae; dactylus 0.55 propodus length, fused with terminal robust seta ( Fig. 30 G ). — Pereopod 4, basis 1.3 rest of article’s length, with 1 simple seta; merus 2 ischium length carpus 2 merus length, with 1 annulate and 3 simple setae; propodus 0.35 carpus length, with 1 simple and 1 annulate seta; dactylus fused with terminal robust seta ( Fig. 30 H ). — Pereopod 5, basis 0.86 rest of article’s length; merus 2 ischium length; carpus 1.7 merus length, with 1 annulate seta; propodus 0.3 carpus length, with 1 annulate seta; dactylus fused with terminal seta ( Fig. 30 I ). — Uropod peduncle 4.4 pleonite 6 length, 3 serrations proximally, 2.4 endopod length; exopod 0.89 endopod length, with 3 simple setae; endopod with 7 microserrate setae interspersed with setulae medially, 1 terminal microserrate robust seta 0.5 endopod length ( Fig. 30 J ).

Remarks. The new species resembles C. cursaruae sp. nov. with a smooth integument, small ocular lobe without lenses; very small antennal notch; maxilliped 3 with serrate medial margin, dactylus of 2nd pereopod with pedunculate tip. It differs with: carapace with a smooth anteroventral margin vs. serrate in C. cursaruae ; maxilliped 3 with a longer merus; pereopod 1 with a shorter basis; pereopod 2 with a longer carpus and shorter dactylus; uropodal endopod with seven medial setae vs. four in C. cursaruae sp. nov.

Distribution. Australia: NSW—northeast of Port Jackson, at 820–888 m depth.

Figures

Figure 30. Campylaspis popai sp. nov. Holotype female (A) body, lateral view; (B) body, 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 0.2 mm; D 0.5 mm; E,F 0.25 mm; G–I 0.5 mm; J 0.5 mm.