Campylaspis spinifera, 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 : 152-153

Campylaspis spinifera sp. nov.

Figures 35 , 36

Material examined. Holotype female, Tas., off Freycinet Peninsula, 42°00.20'S, 148°37.70'E, 720 m, coarse shelly sand, WHOI epibenthic sled, M.F. Gomon et al., RV Franklin, 27 Jul 1986 (stn SLOPE 46 ), NMV J52931.

Paratypes: 14 females, 10 immature males, 1 female, dissected, NMV J52932; 2 females (stn SLOPE 46 ), MGAB CUM 1610 .

Diagnosis. Carapace with a lateral sulcus, tubercles with spines at the base of frontal lobe and near the anterolateral corner, ocular lobe without lenses. Pereopod 1 basis less than half as long as appendage, with slender articles. Pereopod 2 carpus 1.8 times as long as merus and with straight extremity of dactylus. Uropod peduncle 1.4 times as long as pleonite 6 and its endopod, with serrated margins, exopod little shorter than endopod, with terminal robust long seta, endopod with 3 stout setae on inner serrated margin and robust long terminal seta.

Description. Body elongated, with smooth integument. Length: 3.9 mm.

Carapace 0.47 of entire body length, longer than high, with lateral sulcus, pair of tubercles provided with apical strong spines at base of frontal lobe and near pointed anterolateral corner, antennal notch small, ocular lobe small, without lenses, pseudorostrum straight.

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

Maxilliped 2 plumose long seta on inner margin of basis and merus, 2 simple setae and tooth on inner margin of carpus, propoduswithrobustsetaonoutermargin, longerthandactylar teeth, dactylus with 3 equal teeth. Maxilliped 3 basis half of appendage, with 2 plumose setae on distal inner and outer corners, merus second longest article, with tooth and plumose seta on outer margin, shorter carpus, with 2 teeth and plumose seta on outer margin, slender propodus as long as carpus, with 2 pappose setae on inner margin, dactylus half of propodus, with simple terminal setae longer than dactylus.

Pereopod 1 basis less than half as long as appendage, with slender articles, 6 strong serrations on inner margin of ischium, merus and carpus, with fewer simple and plumose setae, merus 2nd longest article, progressively shorter articles from carpus to dactylus, dactylus with short simple setae. Pereopod 2 basis longer than one-third of rest of articles combined, merus with plumose seta on inner and outer margin, carpus 1.8 times as long as merus, with short robust seta and a simple one on inner distal corner, dactylus 3.4 times as long as propodus, with simple and plumose setae and straight extremity. Pereopods 3–5 with slender articles, progressively shorter basis and longer carpus, twice as long as merus in 5th pair. Exopods on maxilliped 3 and pereopod 1, 2.

Uropod peduncle 1.4 times as long as pleonite 6 and its endopod, with serrated margins, exopod little shorter than endopod, with terminal robust long seta, endopod with 2 stout setae on inner serrated margin and robust long terminal seta. Terminal setae with 1 subterminal setule in both rami.

Etymology. The name of the species reflects the presence of characteristic spines on the carapace.

Distribution. Off Freycinet Peninsula, Tas.; 720 m depth.

Remarks. This species is more similar to C. lynseyae than to others. It differs in: a pair of tubercles with a spine on top near the anterolateral margin of the carapace; shorter dactylar teeth of maxilliped 2; larger merus of maxilliped 3; a tapering dactylus of pereopod 2; and shorter and stronger serrated uropods.

Figures

Figure 35. Campylaspis spinifera sp. nov. female paratype: a, body, lateral view; b, carapace, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 1; c, d, 0.2; e, 0.25.

Figure 36. Campylaspis spinifera sp. nov. female paratype: a, pereopod 1; b, pereopod 2; c, pereopod 3; d, pereopod 4; e, pereopod 5; f, pleonite 6 and left uropod. Scale (in mm): a–f, 0.25.