Campylaspis aureliani, 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 : 9-10

Campylaspis aureliani sp. nov.

Fig. 4

Holotype subadult ♂, P.65051, Australia, NSW, Bass Point , -34.6° 150.9°, 35–40 m, Smith-McIntyre Grab , 3–18 Jan 1991, The Ecology Lab for RMI/ Pioneer Project, 4-217, in AM.

Etymology. The species is dedicated in honour of Dr Aurelian Popescu, palaeontologist, specialist in fossil mammals from the Oltenia Museum, Museum of Natural Sciences, Craiova, as a sign of deep respect and friendship.

Diagnosis. Carapace, 0.5 body length, small eyelobe with 3 lenses; maxilliped 3, robust; merus 2.7 ischium length; pereopod 2 dactylus 3.2 propodus length, with tapering end; uropodal peduncle 2.3 pleonite 6 length, 2.3 endopod length; exopod 0.8 endopod length; endopod with 4 setae.

Description. Carapace 0.5 body length; smooth integument, 2 as long as high, 1.25 as long as wide; pseudorostrum 0.25 carapace length; small antennal notch; smooth ventral margin; small eyelobe with 3 lenses; siphon 0.25 carapace length ( Fig. 4 A,B ). — Antenna 1 with robust articles; peduncle article 1 0.8 rest of articles; article 2 1.3 article 3 length; main flagellum 1.4 peduncle article 3 length; accessory flagellum with 1 article; aesthetascs 1.6 main flagellum length ( Fig. 4 C ). — Maxilliped 3 robust, large basis, 0.9 rest of article’s length, with 1 simple and 4 plumose setae; ischium 0.16 basis length, with 1 simple seta; merus 2.7 ischium length, with 1 plumose and 7 simple setae; carpus 0.59 merus length, with 2 simple and 1 pappose seta; propodus as long as carpus, with 1 plumose and 3 pappose setae; dactylus 0.46 propodus length, with 1 terminal simple seta; with exopod ( Fig. 4 D ). — Pereopod 1 basis 0.68 rest of article’s length, with 1 pappose, 1 simple and 1 plumose seta; merus 2.4 ischium length, with 8 pappose and 2 simple setae; carpus 0.9 merus length, with 4 pappose and 3 simple setae; propodus 0.7 carpus length, with 4 pappose and 2 simple setae; dactylus 0.6 propodus length, with 4 simple setae; with exopod ( Fig. 4 E ). — Pereopod 2 basis 0.57 rest of article’s length, with 1 simple and 2 pappose setae; ischium with 1 pappose seta; merus 2.8 ischium length, with 2 pappose and 1 simple seta; carpus 2 merus length, with 1 pappose and 2 simple setae; dactylus 3.2 propodus length, with 8 simple setae, with digitiform tip; with exopod ( Fig. 4 F ). — Pereopod 3 basis 1.73 rest of article’s length, with 1 plumose seta; ischium with 2 simple setae; merus 1.4 ischium length, with 1 simple seta; carpus 1.1 merus length, with 1 annulate seta; propodus 0.54 carpus length, with 1 annulate seta; dactylus fused with terminal robust seta; with exopod ( Fig. 4 G ). — Pereopod 4 basis 1.5 rest of article’s length; ischium 0.6 merus length, with 1 simple seta; carpus as long as merus, with 1 simple and 1 annulate seta; propodus 0.6 carpus length, with 1 annulate seta; dactylus fused with 1 terminal robust seta; with exopod ( Fig. 4 H ). — Pereopod 5 basis 0.8 rest of article’s length; ischium 0.6 merus length, with 1 simple seta; merus with 1 simple seta; carpus 1.2 merus length, with 1 simple and 1 annulate seta; propodus 0.58 carpus length, with 1 annulate seta; dactylus fused with terminal robust seta ( Fig. 4 I ). — Uropod peduncle 2.3 pleonite 6 length, 2.3 endopod length; exopod 0.8 endopod length, with 4 simple setae, 1 robust terminal seta 0.6 exopod length; endopod, 1.2 exopod length, with 2 subterminal robust and 4 microserrate setae, 1 terminal microserrate seta 0.51 endopod length ( Fig. 4 J ).

Remarks. The new species is related to other species with smooth carapace and eyelobe with lenses, C. thompsoni Hale, 1945 from Australia, C. amblyoda Gamô, 1960 from Japan and SE Asia, C. kiiensis Gamô, 1960 and C. totzkei Mühlenhardt-Siegel, 2000 from Sri Lanka; only the new species and C. totzkei have no dorsal keel on the carapace; only C. aureliani has pereopod 2 dactylus with a tapering end, and the uropodal endopod has 5 setae as in C. totzkei (4 or 7 in the remaining species).

Distribution. Australia: NSW—Bass Point, at 40 m depth.

Figures

Figure 4. Campylaspis aureliani sp. nov. Holotype subadult male (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 0.5 mm; C 0.2 mm; D–I 0.25 mm; J 0.5 mm.