Campylaspis georgetae, 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 : 14

Campylaspis georgetae sp. nov.

Fig. 12

Holotype subadult ♀, 2.54 mm, P.88251, Australia, WA, Mangrove Bay , -21.97° 113.93°, 9 Aug 1990, L. Watling, Mangrove Bay 4 | MGB-4, in AM.

Etymology. The species is dedicated in the memory of Georgeta Staicu.

Diagnosis. Carapace almost 0.5 of body length; 2 lateral sulci; maxilliped 3 merus longer than carpus and propodus combined length; pereopod 2 dactylus with digitiform tip; uropodal peduncle 1.65 endopod length, equal rami.

Description. Carapace 0.53 entire body length, 2 lateral sulci not continuous around posterior end, dorsal medial carina, 1.93 longer than high, 1.27 longer than large; antennal notch obsolete; eyelobe with 5 lenses; pseudorostrum 0.25 carapace length; smooth anterior and ventral margins, 2 longer than high ( Fig. 12 A, B ). — Antenna 1 basal article of peduncle 0.6 length of remaining articles combined, main flagellum 1.4 last peduncle article length, aesthetascs longer than main flagellum and last peduncle article; minute accessory flagellum ( Fig. 12 C ). — Maxilliped 3 basis 0.54 length rest of article’s length, with 3 plumose setae; merus 3.7 ischium length, with 1 pappose and 6 simple setae; merus and carpus with serrate medially; carpus 0.4 merus length, with 2 pappose and 2 simple setae; propodus 1.1 carpus length, with 3 pappose setae; dactylus 0.7 propodus length, with 3 terminal robust setae; with exopod ( Fig. 12 D ). — Pereopod 1 basis 0.67 rest of article’s length, with 1 pappose seta; merus 4.5 timers ischium length, with 3 pappose and 1 simple seta; carpus as long as propodus, with 3 pappose and 1 simple seta; propodus with 4 pappose setae; dactylus 0.73 propodus length, with 1 pappose and 4 simple setae; with exopod ( Fig. 12 E ). — Pereopod 2 ( Fig. 12 F ), basis as long as ischium to carpus length, 1 simple and 1 pappose seta; ischium with 1 pappose seta; merus 3 ischium length, with 1 pappose and 1 simple seta; carpus 1.26 merus length, with 1 pappose and 5 simple setae; propodus 0.52 carpus length, with 1 medial simple seta; dactylus 2.7 propodus length, with 3 simple and 1 microserrate seta, with digitiform tip; with exopod. — Pereopod 3 ( Fig. 12 G ), basis 0.75 rest of articles combined length; merus 1.7 ischium length, with 1 simple seta; carpus 1.4 merus length, with 1annulate seta; propodus 0.4 carpus length, with 1 simple and 1 annulate seta; dactylus 0.5 propodus length, fused with terminal robust seta. — Pereopod 4 basis 0.73 rest of articles combined length, with 2 simple setae; ischium as long as merus, with 1 simple seta; merus with 2 simple setae; carpus shorter than ischium and merus combined length, 1 simple short and 1 annulate seta; propodus 2 dactylus length, with 1 annulate seta; dactylus fused with robust terminal seta ( Fig. 12 H ). — Pereopod 5 basis 0.61 rest of articles combined length, as long as merus and carpus combined; 1 annulate seta on propodus, similar dactylus to previous 2 pairs ( Fig. 12 I ). — Uropod peduncle 1.88 6 pleonite length, 1.5 its rami, serrate margins; exopod as long as endopod, with 3 simple and 1 long robust seta, 0.8 exopod length; endopod with serrate margins, 2 simple medially and 1 long robust terminal seta, 0.56 endopod length ( Fig. 12 J ).

Remarks. Campylaspis georgetae sp. nov. is closely related to C. sinuosa Gamô, 1960 . It differs in: carapace without dorsal pellucid spots; maxilliped 3 without medial angle, basis with a longer outer plumose seta, smooth medial margin of propodus, pappose setae vs. simple ones; pereopod 1 basis with 1 instead of 2 setae on medial margin, slender merus, 1 pappose seta on medial margin of merus vs. 6, 1 pappose seta on dactylus instead of a simple seta; pereopod 2 longer than in Gamô’s species, with pappose setae vs. simple ones, fewer seta on dactylus, digitiform tip vs. normal one; pereopod 3 with longer ischium to dactylus articles, stronger terminal seta in pereopods 3–5; shorter uropodal peduncle (ratio peduncle/last pleonite, 1.88 vs. 2).

Distribution. Australia: WA—Mangrove Bay.

Figures

Figure 12. Campylaspis georgetae sp.nov. Holotype female (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 0.5 mm; C 0.1 mm; D–J 0.1 mm.