Campylaspis oneai, 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 : 23

Campylaspis oneai sp. nov.

Figs 26 , 27

Holotype subadult ♂, 2.77 mm, P.88268, Australia, NSW, east of Long Reef , -33.72° 151.77°, 174 m, epibenthic sled, 20 Dec 1985, J.K. Lowry, R. T. Springthorpe, FRV Kapala , K85-21-08, in AM . Paratype, 1♀, P.88269.

Etymology. The species is named in honour of Dr Nicolae Onea, renowned specialist in birds from Brăila Museum Complex, Natural Sciences Section, as a sign of profound friendship and gratitude for all the spiritual help he offered to me.

Diagnosis. Carapace with long lateral sulcus, with transverse ridge anteriorly; maxilliped 3 with narrow merus; robust uropods, uropod peduncle 1.86 pleopod 6 length in female and 1.65 in male, 3 setae on female endopod and 5 on male.

Description of male. Carapace, 0.51 body length, 1.9 as long as high, 1.6 as long as wide; large lateral sulcus, 0.8 carapace length; lateral ridge between posterior end of sulcus and posterior end of carapace; transverse ridge anteriorly; 6 dorsal tubercles; first tubercle on eyelobe; pseudorostrum 0.28 carapace length; small eyelobe, without lenses; marked antennal notch and anteroventral corner; smooth ventral margin ( Fig. 26 A, B ). — Antenna 1 peduncle with short articles, article 1 0.9 as long as rest of articles; article 2 0.9 article 3 length; main flagellum 1.09 peduncle article 3; accessory flagellum with 1 article; aesthetascs 2.7 peduncle article 3 ( Fig. 26 C ). — Maxilliped 3, basis 0.77 rest of article’s length, with 1 simple and 4 pappose setae; merus 4 ischium length, with 1 teeth on merus to propodus, 1 simple, 1 plumose and 1 pappose seta; carpus 0.4 merus length, with 1 pappose and 3 simple setae; propodus 0.7 carpus length, with 3 pappose setae; dactylus 0.6 propodus length, with 4 simple setae; with exopod ( Fig. 26 D ). — Pereopod 1 basis 0.8 rest of article’s length, with 2 plumose setae, a few teeth on basis to carpus; ischium with 1 plumose seta; merus 4 ischium length, with 2 simple and 3 plumose setae; carpus 0.9 merus length, with 4 simple short setae; propodus 0.7 carpus length, with 4 simple setae; dactylus 0.6 propodus length, with 5 simple setae; with exopod ( Fig. 26 E ). — Pereopod 2 with robust articles, basis 0.6 rest of article’s length, with 2 simple setae hyaline crest; merus 4.6 ischium length, with 1 pappose and 2 simple setae; carpus 1.7 merus length, with 2 simple and 2 pappose setae; dactylus 3.7 propodus length, with 8 simple setae; with exopod ( Fig. 26 F ). — Pereopod 3 basis 1.6 rest of article’s length; ischium with 1 simple seta; merus 1.6 ischium length, with 1 simple seta; carpus as long as ischium and merus, with 1 annulate seta; propodus 0.28 carpus length, with 1 annulate seta; dactylus fused with terminal robust seta; with exopod ( Fig. 26 G ). — Pereopod 4 with robust articles, basis as long as rest of article’s length; merus 1.6 ischium length, 1 simple seta; carpus 1.8 merus length, with 1 short annulate seta; propodus 0.5 carpus length, with 1 annulate seta; dactylus fused with terminal seta; with exopod ( Fig. 26 H ). — Pereopod 5 basis 0.76 rest of article’s length; merus 1.6 ischium length, with 1 simple seta; carpus 1.25 merus length; propodus 0.5 carpus length, with 1 annulate seta; dactylus fused with terminal robust seta ( Fig. 26 I ). — Uropod peduncle 1.65 pleonite 6, robust, with 1 ridge medially and serrate margins, 1.7 endopod length; exopod 0.85 endopod length, serrate margins, with 2 short simple and 1 terminal robust simple seta, 0.4 exopod length; endopod, with serrate margins, with 5 microserrate and 1 terminal simple seta, broken ( Fig. 26 J ).

Description of female. Body length 2.83 mm. — Carapace 0.59 body length, 2.3 as long as high, 1.6 as long as wide; sulcus 0.8 carapace length, bordered with pigment dots; transverse ridge anteriorly; eyeless ocular lobe; mid-dorsal crest, half of ventral margin tiny serrated; pseudorostrum 0.24 carapace length; carapace covering first two pereonites and partially 3rd pereonite ( Fig. 27 A, B ). Free pereonites and pleonites with mid-dorsal crest. — Maxilliped 3 basis 0.7 rest of article’s length; slender merus, 1.7 ischium length; carpus 0.6 merus length, with 1 pappose and 3 simple setae; propodus 1.2 carpus length, 1 plumose and 2 pappose setae; dactylus 0.5 propodus length, with 4 simple setae; with exopod ( Fig. 27 C ). — Pereopod 1 basis 0.75 rest of article’s length, with 1 plumose seta; merus 1.5 ischium length; carpus 1.6 merus length, with 2 simple setae; propodus 0.9 carpus, with 2 simple setae; dactylus 0.33 propodus length, with 5 simple setae; with exopod ( Fig. 27 D ). — Pereopod 2 basis 0.56 length of remaining articles; merus 5.6 ischium length, 1 simple seta; carpus 2 merus length; dactylus 3 propodus length, with 9 simple setae; with exopod ( Fig. 27 E ). — Pereopods 3–5 with decreasing basis and increasing carpus in pereopods 3 and 4, decreasing carpus in pereopod 5; with simple and annulate setae; dactylus fused with terminal simple seta ( Fig. 27 F-H). — Uropod peduncle 1.86 pleonite 6 length, robust, microserrate medially, 2.05 endopod length; exopod 0.8 endopod length, with 2 simple and 1 terminal robust seta; endopod serrate medially, with 3 microserrate and 1 terminal microserrate seta ( Fig. 27 I ).

Remarks. Campylaspis oneai sp. nov. resembles C. dumitrumurariui sp. nov. in having a similar sulcus and anterior transverse ridge. Campylaspis oneai differs from C. dumitrumurariui in: carapace with tubercles vs. smooth, maxilliped 3 and pereopod 1 with shorter basis and longer merus, pereopod 2 with robust vs. slender carpus, shorter uropods with 5 vs. 9 medial setae on endopod.

Distribution. Australia: NSW—east of Long Reef, at 174 m; NT—New Year Island, at 10 m depth.

Figures

Figure 26. Campylaspis oneai sp. nov. Holotype subadult male (A) body, lateral view; (B) carapace, 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 0.2 mm; D–J 0.25 mm.

Figure 27. Campylaspis oneai sp. nov. Paratype female (A) body, lateral view; (B) body, dorsal view; (C) maxilliped 3; (D) pereopod 1; (E) pereopod 2; (F) pereopod 3; (G) pereopod 4; (H) pereopod 5; (I) uropod. Scales:A,B 1 mm; C–I 0.3 mm.