Procampylaspis 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 : 161-162

Procampylaspis tasmaniensis sp. nov.

Figures 51 , 52

Material examined. Holotype male, dissected, 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 J53010.

Diagnosis. Carapace with 2 dorsal parallel rows of 4 small tubercles on posterior extremity. Lateral small spines on pereon and pleon. Maxilliped 2 with 1st tooth of dactylus as long as the 3rd one, 5th tooth 1.3 times as long as 3rd tooth, 1st and 2nd teeth enlarged. Maxilliped 3 with teeth on outer margin of merus and carpus. Ischium of pereopod 1 2nd longest article. Pereopod 2 with dactylus 3.7 times as long as propodus. Carpus of 5th pereopod 3.7 times as long as merus. Dactylus of pereopods 3–5 fused with its terminal seta. Uropod peduncle 2.7 times as long as pleonite 6, 2.4 times as long as exopod.

Description. Body with calcified integument. Length 4.6 mm.

Carapace 0.39 entire body length, twice as long as high, with parallel row of 4 dorsal small tubercles on posterior extremity, a ridge starting behind the pseudorostrum obliquely going backwards medially reaching the lower margin, antennal notch marked, ocular lobe minute, eyeless, few fine setae on integument, smooth lower margin.

Antenna 1 short and robust, articles of peduncle progressively shorter, main flagellum 3-articulate, longer than distal article of peduncle, accessory flagellum minute, uniarticulate. Antenna 2 of with several groups of setae on outer margins of last 2 segments of peduncle.

Maxilliped 2 with strong long pappose seta on inner distal corner of basis and carpus, propodus second longest article, 2 plumose setae on outer margin, 1st tooth of dactylus as long as 3rd one, 5th tooth 1.3 times as long as 3rd tooth, 1st and 2nd teeth enlarged, separated up to basis. Maxilliped 3 basis longer than rest of articles combined, with 2 teeth on inner distal corner, 2 long plumose setae on outer distal corner, merus second longest article, with 3 plumose setae on inner margin, 3 teeth and plumose seta on outer margin of merus and carpus, propodus longer than carpus, dactylus 0.7 of propodus

Pereopod 1 basis less than half as long as appendage, ischium 2nd longest article, merus as long as propodus, carpus shorter than propodus, longer than dactylus, dactylus with stout terminal long seta. Pereopod 2 basis shorter than rest of articles combined, plumose seta on inner distal corner of basis and merus, carpus 1.4 times as long as merus, 2 stout setae on distal inner corner of carpus, dactylus 3.7 times as long as propodus, with long terminal plumose seta. Pereopods 3 and 4 with progressively shorter basis, longer than rest of articles combined, dactylus fused with terminal seta. Pereopod 5 with shorter basis and longer carpus, 3.7 times as long as merus, dactylus fused with terminal seta. Exopods on maxilliped 3 and pereopods 1–4.

Uropod peduncle 2.7 times as long as pleonite 6, with plumose setae on inner margin, 2.4 times as long as exopod, endopod broken off.

Etymology. The species bears the name of the collecting area – Tasmania.

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

Remarks. P. bonnieri Calman, 1906 from the Mediterranean and eastern Pacific ( Petrescu, 2000) share with P. tasmaniensis a carapace with spines on the posterior extremity and a minute ocular lobe. The new species has fewer tubercles/spines on the posterior extremity of the carapace, no row of spines near the lower margin of the carapace, dactylar teeth of a different shape, maxilliped 3 without strong teeth on the inner margin of the merus, pereopod 1 with its ischium longer than the propodus, and longer uropods.

Figures

Figure 51. Procampylaspis tasmaniensis sp. nov. male holotype: a, body, lateral view; b, body, dorsal view; c, antenna 1; d, antenna 2; e, maxilliped 2. Scale (in mm): a, b, 1; c, 0.25; d, 0.5; e, 0.2.

Figure 52. Procampylaspis tasmaniensis sp. nov. male holotype: a, maxilliped 3; b, pereopod 1; c, pereopod 2; d, pereopod 3; e, pereopod 4; f, pereopod 5; g, pleonite 6 and left uropod. Scale (in mm): a–g, 0.5.