Campylaspis matacheae, 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 : 20-21

Campylaspis matacheae sp. nov.

Fig. 22

Holotype subadult ♀, 5.0 mm, P.64574, Australia, WA, North West Shelf , -19.93° 117.93°, 42 m, 22 Apr 1983, CSIRO North-West Shelf project, FRV Soela, 02-B3-S | 0283 B03 S, in AM.

Etymology. The species is dedicated to my colleague Ioana Matache, renowed specialist in Insecta Hymenoptera Apoidea , as a sign of gratitude and friendship.

Diagnosis. Carapace, 0.52 body length, with 2 lateral, parallel sulci; maxilliped 2 propodus 1.5 carpus length; maxilliped 3 robust basis; merus to propodus with teeth medially; pereopod 1 merus, 2nd longest article; pereopod 2 dactylus with short digitiform tip; uropodal peduncle 2.4 pleonite 6 length, 2.25 endopod length, endopod with 4 microserrate setae medially.

Description. Carapace, 0.52 body length, 1.58 as long as high, 1.45 as long as wide; with numerous small tubercles; small eyelobe without lenses; pseudorostrum 0.28 carapace length; small antennal notch; smooth ventral margin; 2 lateral, parallel sulci, 0.8 carapace length ( Fig. 22 A, B ). — Antenna 1 peduncle article 1 0.57 rest of article length; article 2 with 1 simple seta, 0.9 article 3 length; main flagellum 0.73 article 3 length; accessory flagellum with 1 article; aesthetascs 1.5 article 3 length ( Fig. 22 C ). — Maxilliped 2, basis 0.79 rest of article’s length, with 1 plumose seta; ischium 0.2 basis length, as long as merus; carpus 2 as long as merus, setulated margins, with 1 pappose seta; propodus 1.5 carpus length, 1 robust long simple seta; dactylus produced as 3 teeth ( Fig. 22 D ). — Maxilliped 3, robust basis, 0.52 rest of article’s length, 1 simple and 3 plumose setae, ischium 0.34 of basis length, merus 3.1 ischium length, small teeth with 8 setulae, 1 pappose and 3 plumose setae; carpus 0.37 merus length, with 3 long teeth, 1 pappose and 3 simple setae; propodus 1.06 carpus length, with 5 teeth and 3 pappose setae margin; dactylus 0.55 propodus length, 3 terminal setae, 2.5 dactylus length; with exopod ( Fig. 22 E ). — Pereopod 1, basis 0.69 rest of article’s length, 1 pappose and 2 plumose setae; ischium 0.13 basis length, 1 strong tooth on medial margin; merus 4 ischium length, with 6 teeth, 4 plumose and 5 pappose setae; carpus 0.65 merus length, 1 pappose and 5 simple setae; propodus 0.96 carpus length, 3 simple and 3 pappose setae; dactylus 0.44 propodus length, 1 simple, 3 pappose setae and 1 terminal simple seta; with exopod ( Fig. 22 F ). — Pereopod 2, basis 0.58 rest of article’s length, 1 simple, 1 plumose and 4 pappose setae; ischium 0.15 basis length; merus 2 ischium length, with 2 simple and 2 plumose setae; carpus 1.7 merus length, with 1 pappose, 3 simple and 3 plumose setae; propodus 0.3 carpus length; dactylus 4.2 propodus length, with 11 short simple setae, digitiform tip; with exopod ( Fig. 22 G ). — Pereopod 3, basis 0.5 entire pereopod length; ischium with 1 simple seta; merus 2 ischium length, with 1 pappose; carpus 1.65 merus length, with 1 pappose and 1 annulate seta; propodus 0.28 carpus length, 1 annulate seta; dactylus fused with terminal robust seta ( Fig. 22 H ). — Pereopod 4, basis 1.03 rest of article’s length, with 1 microserrate seta; ischium 0.17 basis length, with 2 simple setae; merus 1.7 ischium length, 1 simple and 1 pappose seta; carpus 1.33 merus length, 1 microserrate and 1 simple seta; propodus 0.25 carpus length, with 1 microserrate and 1 annulate seta; dactylus fused with terminal robust seta ( Fig. 22 I ). — Pereopod 5, basis 0.9 rest of article’s length; ischium with 1 simple seta; merus 1.5 ischium length, with 1 pappose seta on medial margin; carpus 1.5 merus length, with 1 plumose and 1 annulate seta; propodus 0.2 carpus length, with 1 annulate; dactylus fused with terminal robust seta ( Fig. 22 J ). — Uropod peduncle 2.4 pleonite 6 length, 2.25 endopod length, 2 simple and 8 microserrate setae medially; exopod as long as endopod, with 2 simple and 1 terminal microserrate seta; endopod, 4 microserrate setae medially and 1 microserrate terminal seta, broken ( Fig. 22 K ).

Remarks. The new species is related to C. sculptaspinosa Gerken, 2012 from New Zealand, sharing two parallel sulci; it differs by: no large tubercles on frontal lobe vs. 1 pair in C. sculptaspinosa ; maxilliped 2 with long propodus in C. matacheae sp. nov. vs. shorter propodus, long propodal seta vs. short seta in C. sculptaspinosa ; short dactylus in C. matacheae vs. long dactylus; maxilliped 3 with robust articles vs. slender articles; pereopod 1 with more plumose and pappose setae; dactylus 4.2 propodus length vs. 3.5 in C. sculptaspinosa ; uropodal peduncle with microserrate setae vs. simple setae, endopod with 4 setae medially in C. matacheae vs. 3 setae.

Distribution. Australia: WA—North West Shelf, at 42 m depth.

Figures

Figure 22. Campylaspis matacheae 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, B 1 mm; C 0.5 mm; D 0.5 mm; E–J 0.5; K 1 mm.