Campylaspis wilsoni, 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 : 31-32

Campylaspis wilsoni sp. nov.

Fig. 39

Holotype subadult ♀, 2.75 mm, P.64693, Australia, NSW, Jervis Bay , Moona Moona Creek, -35.05° 150.69°, 28 Jan 1983, in AM . Paratypes: 1♀ P.88274; 1♀ (dissected) [same data as P.88274] MGAB CUM 1648 ; 1♀, P.64573; 1♀, P.88617; 1♀, P.88273; 2♀♀, P.88275.

Etymology. The species is named in honour of Dr Buz Wilson, retired Principal Research Scientist at the Australian Museum, as a sign of gratitude for the help and advice that I received from him during my work at the museum.

Diagnosis. Carapace 0.45 body length, ocular lobe with 3 large lenses; maxilliped 2 dactylus with terminal teeth shorter than propodal seta; maxilliped 3 carpus longer than merus; pereopods with large articles; pereopod 2 dactylus with terminal seta; uropodal peduncle 1.48 6 pleonite length, 2.3 endopod length, endopod 1.1 exopod length, endopod with 3 short medial stout setae.

Description. Carapace 0.45 entire body length, with 2 lateral ridges delimiting 2 sulci, 1 transverse ridge on upper sulcus, on anterior 1/3 of carapace; small antennal notch; ocular lobe with 3 large lenses ( Fig. 39 A, B ). — Antenna 1 peduncle with short, robust articles, article 1 0.7 rest of article’s length, with 2 simple setae; article 2 1.25 article 3 length; main flagellum 3-articulate, aesthetascs 2.7 main flagellum length, accessory flagellum minute, uniarticulate ( Fig. 39 C ). — Maxilliped 2 basis 0.6 entire maxilliped length, fused with ischium, with short plumose seta on distal medial corner; carpus 1.6 merus length, with 2 simple setae; propodus 2.9 carpus length, longer than distal lateral strong seta; dactylus with 3 teeth shorter than propodal seta ( Fig. 39 D ). — Maxilliped 3 basis 0.5 rest of article’s length, with 3 plumose setae on medial distal corner, 2 much longer on lateral distal corner; large merus, with serrate margins, as long as basis; carpus, little shorter than propodus; propodus with serrate margins; short dactylus, 0.4 as long as propodus, with terminal simple setae ( Fig. 39 E ). — Pereopod 1 basis 0.53 rest of articles combined length; large articles; basis to propodus with numerous plumose setae on both margins; merus, 2nd longest article, 1.25 carpus length; carpus as long as propodus; propodus 2 dactylus length; dactylus with terminal simple setae ( Fig. 39 F ). — Pereopod 2 basis 0.4 as long as entire length of pereopod, numerous plumose setae on both margins of basis to carpus; merus 7.5 ischium length; carpus 2.5 propodus length; dactylus 3 propodus length, without tapering tip, numerous short simple setae on both margins ( Fig. 39 G ). — Pereopods 3–5 with decreasing basis; increasing carpus in pairs 3 and 4, shorter in pair 5; dactylus with terminal long robust seta ( Fig. 39 H–J ). — Uropod with serrate margins, large peduncle, 1.48 pleonite 6 length, 2.3 endopod length, exopod/ endopod: 0.85, exopod with 1 outer subterminal seta and 1 short terminal seta, endopod with 3 short medial setae and 1 short robust terminal seta ( Fig. 39 K ).

Remarks. This species is similar to C. triplicata Hale, 1945 , but differs mainly by having two instead of three lateral ridges delimiting depressions.

Distribution. Coral Sea: Portlock Reef, at 20 m; Australia: NSW—Jervis Bay, and northeast of Eden, at 250–300 m; NT—New Year Island, at 20 m; and WA—North West Shelf, at 41–43 m depth.

Figures

Figure 39. Campylaspis wilsoni sp. nov. Holotype female (A) body, lateral view; (B) carapace, dorsal view; (C) antenna 1; (D) maxilliped 2; (E) maxilliped 3; (F) pereopod 1; (G) pereopod 2; (H) pereopod 3; (I) pereopod 4; (J) pereopod 5; (K) uropod. Scales: A, B 1 mm; C,E–K 0.3 mm; D 0.3 mm.