Campylaspis nowrae, Petrescu, 2006

Petrescu, Iorgu, 2006, Nannastacidae (Crustacea: Cumacea) from eastern Bass Strait, the south-eastern Australian slope, and Antarctica in the collections of Museum Victoria, Memoirs of Museum Victoria 63 (2), pp. 129-173 : 145-146

Campylaspis nowrae sp. nov.

Figures 24 , 25

Material examined. Holotype female, NSW, off Nowra, 34°51.90'S, 151°12.60'E, 770 m, crinoid dominated, WHOI epibenthic sled, G.C.B. Poore and C.C. Lu, RV Franklin, 15 Jul 1986 (stn SLOPE 6 ), NMV J J52945.

Diagnosis. Carapace with large lateral sulcus and 2 dorsal transverse ridges. Robust antenna 1. Maxilliped 3 with slender articles, dactylus with long terminal seta. Pereopod 1 with merus, carpus and propodus subequal, dactylus with long plumose subterminal seta. Pereopod 2 with digitiform extremity of long dactylus. Dactylus fused with its terminal seta in pereopods 3–5. Short uropods, peduncle 1.3 times as long as pleonite 6 and 1.7 times as long as equal rami, endopod with 2 stout setae on inner margin.

Description. Body with highly calcified integument, smooth. Length: 5.1 mm.

Carapace 0.49 body length, 2.3 times as long as high, with a large lateral sulcus posteriorly continued by a large concavity up to the median part, 2 dorsal transverse ridges in median part that reach upper side of sulcus, 2 small tubercles on lateral side of pseudorostrum, minute ocular lobe with a large base, without eyes, antennal notch large, no lateral and lower serration.Pleonites 1–4 with lateral acute expansions, pleonite 6 the longest.

Antenna 1 with robust articles, articles of peduncle progressively shorter toward the distal extremity, main flagellum 3-articulate, shorter than distal article of peduncle, accessory flagellum minute, uniarticulate.

Maxilliped 3 basis little shorter than rest of articles combined, with hairy margins, plumose setae on outer and inner distal corners, merus with small inner concavity, with plumose seta on outer margin, carpus shorter than merus, with plumose seta on outer serrated margin, propodus second longest article, dactylus half of propodus, with long simple terminal seta.

Pereopod 1 basis less than half as long as appendage, with serrated outer margin and plumose seta on inner distal corner, merus, carpus and propodus subequal with numerous plumose setae on both margins, dactylus shorter than propodus, with plumose terminal seta. Pereopod 2 basis less than half as long as appendage, simple and plumose setae on inner margin of merus, carpus 1.7 times as long as merus, with stout seta and pappose seta on distal inner corner, dactylus 4.6 times as long as propodus, as long as merus, carpus and propodus combined, with lateral setae and digitiform short tip provided with short simple seta. Pereopods 3–5 with progressively shorter basis and longer carpus (carpus of 5th pair twice as long as merus), simple stout long setae on outer margin of carpus, 1 seta on its outer distal corner, dactylus fused with its terminal stout microserrate seta. Exopods on maxilliped 3 and pereopods 1, 2; with 2nd article very long.

Uropod peduncle 1.3 times as long as pleonite 6 and 1.7 times as long as equal rami, with serrated inner margin, exopod 2-articulate, with subterminal microserrate seta and a terminal longer one, endopod with 2 stout microserrate setae on inner margin, single subterminal setules and longer terminal seta (shorter than endopod), and 3 pedunculate setae.

Etymology. The species bears the name of a town in NSW near the type locality.

Distribution. Off Nowra, NSW; 770 m depth.

Remarks. The carapace of C. nowrae has two pairs of transverse dorsal crests in the median region similar to the carapace of form B of C. johnstoni Hale, 1937 found by Ledoyer (1993) in the Weddell Sea and C. bulbosa Jones, 1974 from the Atlantic coasts of south-western Africa. It differs in the posterior extremity of the carapace with a different arrangement of ridges, in much shorter uropods, and an endopod with two setae on its inner margin.

Figures

Figure 24. Campylaspis nowrae sp. nov. female holotype: a, body, lateral view; b, body, dorsal view; c, antenna 1; d, maxilliped 3; e, pereopod 1; f, pereopod 2. Scale (in mm): a, 1; b, 1; c, d, 0.25.

Figure 25. Campylaspis nowrae sp. nov.female holotype:a, pereopod 3; b, pereopod 4; c, pereopod 5; d, pleonite 6 and left uropod. Scale (in mm): a–d, 0.5.