Campylaspis sienkiewiczi, 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 : 27-28

Campylaspis sienkiewiczi sp. nov.

Fig. 33

Holotype ♀, 3.44 mm, P.88216, Australia, NSW, north-east of Port Jackson , -33.68° 152.00°, 820–888 m, beam trawl, 11 Feb 1986, R. T. Springthorpe, FRV Kapala , K86-01-07, in AM . Paratypes: 1♀, P.65303; 1 subadult ♂, P.65557.

Etymology. The species is dedicated to the memory of Dr Igor Sienkiewicz (1907–2006), a brilliant specialist in Heteroptera, who worked for a short period of time but left unforgettable traces in the “Grigore Antipa” Museum (1956–1964) and in the Romanian history of science, as a sign of high gratitude for his moral and professional qualities.

Diagnosis. Carapace 0.5 body length, 2 lateral sulci delimited by 3 ridges; pereopod 2 dactylus 3 propodus length, with digitiform tip; uropodal peduncle 2 pleonite 6 length, 1.6 endopod length, exopod shorter than endopod, endopod with 3 setae on medial margin.

Description. Carapace 0.47 body length, 2.3 as long as high; 2 lateral sulci delimited by 3 ridges; pseudorostral lobes 0.3 carapace length, meeting in front of eyeless minute ocular lobe; tiny antennal notch ( Fig. 33 A, B ). — Antenna 1 peduncle article 1 0.85 rest of article’s length, with 1 simple seta; article 2 as long as article3, with1 simple seta; main flagellum with 3 articles, 0.7 peduncle apical article, accessory flagellum with 1 article; aesthetascs 2 main flagellum length ( Fig. 33 C ). — Maxilliped 2 basis fused with ischium, with plumose seta; merus with 1 plumose seta; carpus 2.8 merus length, with 1 simple seta; propodus 1.8 carpus length, with short tooth and 2 simple setae; short tridentate dactylar teeth equal in length ( Fig. 33 D ). — Maxilliped 3 basis 0.8 rest of article’s length, with 4 plumose setae and 1 robust tooth medially; merus, 4.5 ischium length, with 1 plumose and 5 simple setae; carpus 0.4 merus length, with 2 simple and 1 plumose seta; propodus 1.1 carpus length, with 2 pappose setae; dactylus 0.6 propodus length, with 3 simple setae; with exopod ( Fig. 33 E ). — Pereopod 1 basis 0.6 rest of article’s length, with 2 plumose setae; ischium with 1 plumose seta; ischium to propodus with serrate margins; merus 3.3 ischium length, with 2 simple and 3 plumose setae; carpus 0.8 merus length, with 3 simple and 3 plumose setae; propodus 0.8 carpus length, with 2 simple and 3 plumose setae; dactylus 0.7 propodus length, with 6 simple setae; with exopod ( Fig. 33 F ). — Pereopod 2 basis 0.6 rest of article’s length, with 1 simple and 2 plumose setae; merus 5 ischium length, with 2 simple setae; carpus 3 merus length, with 1 simple and 4 plumose setae; dactylus, 3 propodus length, with short digitiform tip, 9 simple setae and 1 terminal plumose seta; with exopod ( Fig. 33 G ). — Pereopods 3–5 with decreasing basis and increasing carpus length; pereopod 3 basis with 1 simple seta, plumose seta in pereopods 4 and 5; ischium and merus with 1 simple seta; carpus with 1 simple and 1 annulate seta; propodus with 1 annulate seta; dactylus with 1 annulate and 1 long simple terminal seta ( Fig. 33 H–J ). — Uropod peduncle 2 pleonite 6 length, 1.6 endopod length, with serrate margins; exopod 0.8 endopod length, with 2 simple setae and 1 terminal robust simple seta; endopod with 3 simple setae medially and 1 terminal robust seta longer than in endopod ( Fig. 33 K ).

Remarks. The new species is closely related to C. triplicata Hale, 1945 with similar ridges on carapace. Campylaspis sienkiewiczi sp. nov. differs with: small eyeless ocular lobe versus a large one, with 3 lenses; pereopod 2 dactylus with digitiform tip, absent in Hale’s species.

Distribution. Australia, widely distributed: NSW— northeast of Port Jackson, and Pittwater, at 5–888 m; and WA—North West Shelf, at 52 m depth.

Figures

Figure 33. Campylaspis sienkiewiczi sp. nov.Holotype female (A) body, lateral view; (B) body, 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 0.2 mm; D 0.2 mm; E–J 0.3 mm; K 0.5 mm.