Campylaspis roccatagliatai, 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 : 26-27

Campylaspis roccatagliatai sp. nov.

Fig. 32

Holotype subadult ♀, 2.33 mm, P.88270, Australia, WA, Rottnest Island , Thompsons Bay, -32° 115.55°, 3 m, airlift, Posidonia bed, 20 Dec 1983, J.K. Lowry, R. T. Springthorpe, WA-220, in AM . Paratypes: 1♀, P.88271; 1♀, MGAB CUM 1662 .

Etymology. Species dedicated to Dr Daniel Carlos Roccatagliata, world famous specialist in Cumacea (University of Buenos Aires, Argentina), as a sign of gratitude for the extreme friendship he has shown me over time.

Diagnosis. Carapace 0.47 entire body length, 2 lateral sulci, dorsal carina; maxilliped 2 propodus with seta little exceeding dactylar teeth; pereopod 2 dactylus 3.8 propodus length, with digitiform tip; uropodal peduncle 1.3 pleonite 6 length, 1.4 exopod length, exopod little longer than endopod, endopod with 2 setae on medial margin.

Description. Carapace 0.47 entire body length, 2 longer than high; pseudorostrum little upturned, meeting in front of eyeless ocular lobe, 2 lateral sulci, dorsal carina on posterior half; antennal notch obsolete ( Fig. 32 A, B ). — Antenna 1 peduncle article 1 0.65 rest of article’s length; article 2 1.25 article 3 length; main flagellum with large articles, accessory flagellum with 1 article, aesthetascs 1.4 main flagellum ( Fig. 32 C ). — Maxilliped 2 basis fused with ischium, with plumose seta; merus with plumose seta; carpus 2 merus length, with 2 simple setae; propodus, 1.6 carpus length, with 1 tooth, 1 seta exceeding dactylar teeth; dactylus teeth, central one short ( Fig. 32 D ). — Maxilliped 3 basis 0.9 rest of article’s length, with 4 plumose setae; ischium with 1 plumose seta; merus, 1.4 ischium length, with 3 plumose seta; carpus 0.3 merus length, with 1 plumose seta; propodus 1.8 carpus length, with 1 plumose and 2 pappose setae; dactylus 0.4 of propodus length, with 4 simple setae; with exopod ( Fig. 32 E ). — Pereopod 1 with robust articles, basis 0.4 rest of article’s length, with 3 plumose setae; ischium with 1 plumose seta; merus 2.3 ischium length, with 5 plumose setae; carpus 0.8 merus length, with 3 simple and 2 plumose setae; propodus as long as carpus, with 2 simple and 2 plumose setae; dactylus 0.8 propodus length, with 4 simple setae; with exopod ( Fig. 32 F ). — Pereopod 2 with robust articles, basis 0.3 rest of article’s length, with 1 simple seta; merus 7.5 ischium length, with 1 simple and 2 plumose setae; carpus 1.2 merus length, with 1 short robust and 4 simple setae; dactylus 3.8 propodus length, with digitiform tip, with 9 simple short simple setae; with exopod ( Fig. 32 G ). — Pereopods 3–5 with robust articles, with decreasing basis and increasing carpus; 1 simple and 2 plumose setae in pereopod 3 and 4, 1 simple in pereopod 5; ischium and merus with 1 simple seta; carpus with 2 annulate setae; propodus with 1 annulate seta; dactylus fused with terminal stout seta ( Fig. 32 H–J ). — Uropod peduncle 1.3 pleonite 6 length, 1.4 rami, serrate medially; exopod 1.02 endopod length, with 4 simple setae; endopod with serrate margins, 3 simple short setae and 1 stout terminal simple seta ( Fig. 32 K ).

Remarks. Campylaspis roccatagliatai sp. nov. has a carapace that resembles that of C. johnstoni Hale, 1937 , C. latidactyla Hale, 1945 , C. lowryi sp. nov., and C. udrescui sp. nov. It differs in having: an eyeless ocular lobe versus lenses present in C. latidactyla , two lateral depressions instead of one in C. johnstoni and C. latidactyla , endopod of uropod with two lateral setae instead of three in C. udrescui and five in C. lowryi . Campylaspis roccatagliatai has the pereopod 2 dactylus with a digitiform tip stronger than in C. udrescui , without a process as in C. latidactyla . A similar dactylus of pereopod 2 is also present in the Japanese species, C. fusiformis Gamô, 1960b and C. granulata Gamô, 1960a , but with a rounded dactylar tip and with visual elements, missing in C. roccatagliatai . The form of the dactylus of pereopods 3–5 of C. roccatagliatai is different from all these species, with short and robust article fused with short and robust terminal seta vs. longer and slender dactylus and seta as in C. johnstoni , C. latidactyla , C. udrescui or dactylus not fused with seta like in C. fusiformis , C. granulata and C. lowryi .

Distribution. Australia: WA—Rottnest Island, at 3 m depth.

Figures

Figure 32. Campylaspis roccatagliatai 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 0.5 mm; B 0.5 mm; C 3.3 mm; D 0.1 mm; E–G 0.2 mm; H–J 0.3 mm.