Campylaspis udrescui, 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 : 29

Campylaspis udrescui sp. nov.

Fig. 35

Holotype ♀, 7.08 mm, P.88210, Australia, NSW, east of Newcastle , -33.06° 152.81°, 2632–2698 m, Menzies trawl, 8 Oct 1982, R. T. Springthorpe, W.F. Ponder, RV Tangaroa , U216, in AM.

Etymology. The species is dedicated to the memory of my colleague Aurel Udrescu (1955–2006), a brilliant specialist in Mysidacea, with a quick and fulminating activity at the “Grigore Antipa” Museum, as a sign of posthumous gratitude for all his contributions to the study of our museum’s collection and beyond.

Diagnosis. Carapace 0.45 body length, 2 lateral sulci bordered by 3 ridges meeting posteriorly part; maxilliped 2 propodus with 1 seta medially longer than dactylar teeth; pereopod 2 dactylus 3.8 propodus length, with long digitiform tip; uropodal peduncle 2.1 pleonite 6 length, 1.9 exopod length, exopod 1.05 endopod length; endopod with 3 microserrate setae medially.

Description. Carapace 0.45 entire body length, 2.2 as long as high, 2 lateral sulci bordered by 3 ridges meeting posteriorly; 1 pair of tubercles on basis of frontal lobe; ocular lobe without lenses; pseudorostral lobes 0.28 entire carapace length; smooth integument; antennal notch almost absent ( Fig. 35 A,B ). — Antenna 1 peduncle article 1 0.6 rest of article’s length; article 2 1.5 article 3 length; main flagellum, with 3 articles, 1.4 article 3 length; accessory flagellum with 1 article; aesthetascs as long as main flagellum ( Fig. 35 C ). — Maxilliped 2 basis fused with ischium, with 1 plumose seta; merus with 1 plumose seta; carpus as long as merus length, with 2 simple setae; propodus 1.5 carpus length, with 1 tooth and 1 seta; dactylus produced as 3 teeth, central tooth shortest ( Fig. 35 D ). — Maxilliped 3 basis 0.8 maxilliped length, with 1 simple and 3 plumose setae; basis to propodus with serrate margins; ischium with 1 medial tooth; merus 3.3 ischium length, with 1 simple and 5 plumose setae; carpus 0.4 merus length, with 1 plumose and 8 simple setae; propodus 1.4 carpus length; dactylus 1.5 propodus length; with exopod ( Fig. 35 E ). — Pereopod 1 basis 0.47 entire pereopod length, basis to propodus with serrate margins, with 2 plumose setae; ischium with 1 plumose seta; merus, 2.4 ischium length, with 5 simple and 3 plumose setae; carpus 1.6 propodus length, with 5 simple and 4 plumose setae; propodus 1.6 dactylus length, with 3 simple and 2 plumose setae; dactylus 0.7 propodus length, with 7 simple setae; with exopod ( Fig. 35 F ). — Pereopod 2 basis 0.45 pereopod length; merus with 3 simple setae, carpus 1.6 merus length, with 2 distal medial simple setae, dactylus 3.8 propodus, almost equal with merus, carpus and propodus combined, with long digitiform tip, terminal short simple setae; with exopod ( Fig. 35 G ). — Pereopods 3–5 with serrate margins, progressively shorter basis, longer than rest of pereopod in 3rd pair, 2 annulate setae, dactylus fused with terminal simple long seta ( Fig. 35 H–J ). — Uropod peduncle 2.1 pleonite 6 length, 1.9 exopod length, serrate margins with simple setae, exopod little longer than endopod, with 5 setae on margins, long terminal microserrate seta, endopod with 3 microserrate setae on medial margin and terminal much stronger and longer one ( Fig. 35 K ).

Remarks. Campylaspis udrescui sp. nov. is closer to C. triplicata Hale , C. pileus Foxon , C. roccatagliatai sp. nov., C. sienkiewiczi sp. nov., with 2 lateral despressions on carapace bordered with ridges, all of them from Australian waters. Campylaspis udrescui differs from C. triplicata in the ocular lobe without lenses vs. ocular lobe with lenses in C. triplicata ; from C. pileus with short pseudorostrum vs. long pseudorostrum; and from C. roccatagliatai and C. sienkiewiczi sp. nov. in having a slender maxilliped 3 merus vs. large maxilliped 3 merus. Campylaspis udrescui further differs from C. roccatagliatai in more slender pereopods 3–5 and longer uropods.

Distribution. Australia: NSW—east of Newcastle, 2698 m depth.

Figures

Figure 35. Campylaspis udrescui sp. nov. Paratype 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 0.3 mm; D,E,G 0.3 mm; F 1 mm; H–J 0.5 mm; K 0.3 mm.