Campylaspis tasmaniensis, 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 : 153-155

Campylaspis tasmaniensis sp. nov.

Figures 37–39

Material examined. Holotype female, Tas., off Freycinet Peninsula, 42°02.20'S, 148°38.70'E, 800 m, coarse shelly sand, WHOI epibenthic sled, M.F. Gomon et al., RV Franklin, 27 Jul 1986 (stn SLOPE 45 ), NMV J52947.

Allotype: male (stn SLOPE 45 ), NMV J52948.

Paratypes: 1 female, 2 mancas (stn SLOPE 45 ), NMV J52949 .

Diagnosis. Carapace, pereon and pleon with numerous tubercles. Basal article of main flagellum of antenna 1 enlarged. Dactylar teeth of maxilliped 2 as long as robust seta of propodus, median tooth much smaller. Maxilliped 3 basis short, dactylus with long terminal simple setae. Pereopods with slender articles. Pereopod 1 propodus as long as merus, longer than carpus. Pereopod 2 with long dactylus with straight extremity. Uropod peduncle 2.3 times as long as pleonite 6 and endopod, with serrated margins, exopod little shorter than endopod, with subterminal microserrate seta and longer robust terminal seta, endopod with 3 stout setae on inner serrated margin, a subterminal and a terminal microserrate robust seta.

Description of female. Body with tubercled reticulated integument, without setae or spines. Length: 5.4 mm.

Carapace half body length, 2.1 times as long as high, with lateral sulcus that rises from anterolateral part and fuses with similar sulcus from other side, 2 parallel dorsal rows of acute tubercles, 2 transverse parallel rows of tubercles at base of frontal lobe, rows of tubercles delimiting the sulcus, 3 spines on upper side of sulcus toward tip of pseudorostrum, small antennal notch, anterolateral corner acute, short serrated ventral margin, ocular lobe minute, without lenses, pseudorostrum long and straight.

Antenna 1 proximal article of peduncle the longest, distal article longer than median one, short main flagellum 3-articulate, basal one enlarged, accessory flagellum minute, 1-articulate.

Maxilliped 2 with plumose long seta on inner margin of basis and merus, 2 simple setae and tooth on inner margin of carpus, propodus with robust seta on outer margin, as long as dactylar teeth, dactylus with 3 teeth, median one much shorter. Maxilliped 3 basis less than half as long as appendage, with 1 plumose seta on distal inner and outer corners, merus 2nd longest article, with long plumose seta on outer margin and simple and plumose setae on inner margin, carpus half of merus, with 3 teeth and long plumose seta on outer margin, slender propodus 1.6 times as long as carpus, dactylus 0.6 of propodus length, with simple long terminal setae (3.5 times as long as dactylus).

Pereopod 1 basis less than half as long as appendage, with slender articles, serration on inner margin of merus and carpus, with fewer simple and plumose setae, propodus and dactylus with simple setae, merus 2nd longest article, propodus as long as merus and longer than carpus, dactylus with short simple setae. Pereopod 2 basis more than one-third of rest of articles combined, with plumose seta on distal inner and outer corner, merus with plumose seta on inner and outer margin, carpus 1.8 times as long as merus, with short robust seta, a plumose long seta on inner distal corner, dactylus 4 times as long as propodus, with 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, 2 plumose setae on outer margin of carpus in pair 3 and 4, dactylus with stout long terminal seta. Exopods on maxilliped 3 and pereopods 1, 2.

Uropod peduncle 2.3 times as long as pleonite 6 and endopod, with serrated margins, exopod little shorter than endopod, with subterminal microserrate seta and longer simple terminal seta, endopod with 3 stout setae on inner serrated margin, subterminal and terminal microserrate robust setae.

Description of male. Body with integument as in female, last 3 pleonites missing. Carapace with more dorsal tubercles, lateral sulcus shorter than in female, sulcus from each side separated, carapace more compressed laterally than in female.

Maxilliped 3 basis shorter, a half of appendage, merus more slender than in female, propodus with longer plumose seta on outer margin, dactylus with long terminal setae as in female.

Pereopod 1 with more numerous plumose setae on all articles including dactylus. Pereopod 2 dactylus shorter than in female, 3 times as long as propodus (versus 4 times), with more setae. Pereopods 3, 4 with large basis characteristic of males, 3–5 with more plumose setae, dactylus fused with terminal robust seta.

Etymology. The species bears the name of the type locality – Tasmania.

Distribution. Off Freycinet Peninsula, Tas.; 800 m depth.

Remarks. The general body shape is reminiscent of C. sagamiensis Gamô, 1967 but without pits and spines on the integument, with a larger lateral sulcus, with a bulky basal article of the main flagellum of antenna 1, an accessory flagellum with one article, not with two. C. tasmaniensis also is close to C. mosambica Ledoyer, 1988 but with more tubercles on the carapace, and the dactylus of maxilliped 3 with a much longer terminal seta.

Figures

Figure 37. Campylaspis tasmaniensis sp. nov. female holotype: a, body, lateral view; b, body, 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 38. Campylaspis tasmaniensis sp. nov. female holotype: 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–e, 0.5; f, 0.25.

Figure 39. Campylaspis tasmaniensis sp. nov. male allotype: a, body, lateral view; b, body, dorsal view; c, maxilliped 3; d, pereopod 1; e, pereopod 2; f, pereopod 3; g, pereopod 4; h, pereopod 5. Scale (in mm): a, b, 1; c–h, 0.5.