Campylaspis oanae, 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 : 22

Campylaspis oanae sp. nov.

Fig. 24

Holotype subadult ♀, 3.57 mm, P.65544, Australia, WA, North West Shelf , -19.93° 117.93°, 43 m, sled, 26 Aug 1983, RV Soela, 04-B3-S | S04-83-B3, in AM.

Etymology. The species is dedicated to my colleague Dr Oana Paula Popa, specialist in molecular genetics of Mollusca, as sign of highly appreciation.

Diagnosis. Carapace 0.56 body length, 2 lateral sulci; pereopod 2 dactylus with digitiform tip; uropodal peduncle 2.72 pleonite 6 length, 2 its equal rami length, endopod with 4 microserrate setae.

Description. Carapace, 0.56 body length, 1.87 as long as high, 1.27 as long as wide, upper part of carapace granular; 1 pair of transversal dorsal ridges on basis of frontal lobe; 1 dorsal carina between basis of frontal lobe towards posterior extremity; 2 lateral sulci, 0.86 carapace length; pseudorostrum 0.3 carapace length; ocular lobe without lenses; smooth ventral margin ( Fig. 24 A, B ). — Antenna 1 peduncle article 1 0.68 rest of article’s length, with 1 simple and 1 pappose seta; article 2 as long as article 3; main flagellum 1.29 article 3 length, accessory flagellum with 1 article; aesthetascs 0.7 main flagellum length ( Fig. 24 C ). — Maxilliped 3 basis 0.71 rest of article’s length, with 5 plumose setae; merus to dactylus with serrate margins; merus 2.69 ischium length, with 1 plumose and 10 simple setae; carpus 1.71 propodus length, with 2 teeth, 2 plumose and 4 simple setae; propodus 0.63 dactylus length, with 2 pappose setae; dactylus 2 propodus length, with 3 terminal setae; with exopod ( Fig. 24 D ). — Pereopod 1 basis 0.7 rest of article’s length, with 1 plumose and 2 pappose setae; ischium with 2 pappose setae; merus 9 ischium length, with 10 pappose setae; carpus 0.27 merus length, with 2 simple and 5 pappose setae; propodus as long as carpus, with 3 simple and 4 pappose setae; dactylus 0.2 propodus length, with 3 simple and 2 pappose setae; with exopod ( Fig. 24 E ). — Pereopod 2 basis 0.63 rest of article’s length, with 3 pappose and 2 simple setae; ischium with 1 pappose seta; merus 2 ischium length, with 1 tooth, 1 simple and 1 pappose seta; carpus 1.03 merus length, with 4 simple and 6 pappose setae; propodus with 1 simple seta; dactylus 3.2 propodus length, with digitiform tip and 12 simple setae; with exopod ( Fig. 24 F ). — Pereopods 3–5 with decreasing basis and increasing carpus length; pereopods 3 and 5 with basis to merus with 1 plumose seta, pereopod 4 ischium and merus with 1 plumose seta; dactylus fused with terminal robust seta ( Fig. 24 G-I). — Uropod peduncle 2.72 pleonite 6 length, 2 endopod length, with 9 long simple setae interspersed with shorter setae; exopod as long as endopod, with 3 simple and 1 terminal microserrate robust seta; endopod with 4 microserrate short setae and 1 terminal robust microserrate seta ( Fig. 24 J ).

Remarks. The new species is closely related to C. sculptaspinosa Gerken, 2012 from New Zealand, also with two parallel sulci, but with four setae on medial margin of uropodal endopod versus three, maxilliped 3 merus larger and propodus shorter than dactylus, dactylus of 2nd pereopod with shorter setae.

Distribution. Australia: WA—North West Shelf, at 43 m depth.

Figures

Figure 24. Campylaspis oanaesp.nov.Holotype female (A) body,lateral view; (B) cephalothorax,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 0.5 mm; D–J 0.5 mm.