Procampylaspis australiensis, 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 : 156-158

Procampylaspis australiensis sp. nov.

Figures 42–44

Material examined. Holotype female, NSW, off Nowra, 34°59.52'S, 151°05.94'E, 204m, coarse shell, WHOI epibenthic sled, G.C.B. Poore et al., RV Franklin, 14 Jul 1986 (stn SLOPE 1 ), NMV J53000.

Paratypes: 1 immature male, 1 female (stn SLOPE 45 ), NMV J53001 ; 1 female, dissected (stn SLOPE 1 ), NMV J53002 .

Diagnosis. Carapace large, with smooth integument.Maxilliped 2 with 6 dactylar teeth. Merus of pereopod 1 as long as carpus, shorter than propodus. Pereopod 2 with short and bulky articles, dactylus twice as long as propodus. Uropod peduncle 1.4 times as long as pleonite 6, 1.1 times as long as its endopod, endopod with 3 inner setae, little longer than exopod.

Description of female. Body with smooth integument. Length: 2.6 mm.

Carapace 0.46 body length, 1.6 times as long as high, with middorsal ridge, short ocular lobe devoid of lenses, pseudorostral lobes 3 times as long as tip of ocular lobe, antennal notch small, ventral margin smooth.

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

Maxilliped 2 basis and merus with pappose seta on inner margin, carpus and propodus with plumose seta on inner margin, propodus second longest article, dactylus fused with its 6 teeth, first 3 teeth progressively shorter toward distal end, 4th tooth longer, 5th tooth half of previous one, curved, 6th tooth the longest, 1.7 times as long as 5th one, barely curved. Maxilliped 3 basis half of appendage, with plumose seta on inner distal corner, 2 longer setae on outer margin, merus with tooth and plumose seta on outer margin, carpus with 3 teeth and plumose seta on outer margin, propodus 2nd longest article, with 2 pappose setae on inner margin, dactylus half of propodus, with simple long setae.

Pereopod 1 merus as long as carpus, shorter than propodus, dactylus half of propodus, with short simple terminal setae. Pereopod 2 with short and bulky articles, basis 3rd of appendage length, with plumose seta on inner and outer distal corners, merus with tooth and plumose seta on inner margin, carpus little longer than merus, with 2 short stout setae on distal inner corner, dactylus twice as long as propodus with few simple setae. Pereopods 3–5 with progressively shorter basis (as long as rest of articles combined in 3rd pair), dactylus with simple stout terminal seta. Exopods on maxilliped 3 and pereopods 1, 2.

Uropod peduncle 1.4 times as long as pleonite 6, 1.1 times as long as endopod, with serrated margins, exopod shorter than endopod with terminal long stout seta, endopod with 3 inner setae, robust terminal seta.

Description of immature male. Body length: 3 mm.

Carapace, less vaulted than in female, 2.1 times as long as high. Exopods, 5 pairs not fully developed.

Uropod longer than in female, peduncle 2.4 times as long as pleonite 6, strongly serrated, 1.5 times as long as endopod, exopod 0.7 of endopod length, with stout subterminal seta and terminal seta twice as long, endopod with 3 microserrate setae on strongly serrated inner margin, subterminal short microserate seta and a terminal, more robust and longer seta.

Etymology. The name “ australiensis ” refers to Australia.

Distribution. Off Nowra, NSW, off Freycinet Peninsula, Tas.; 204– 800 m.

Remarks. The new species differs from other species of Procampylaspis in the following combination of female characteristics: the carapace is without spines or tubercles and maxilliped 2 has six teeth on the dactylus. The only known species of Procampylaspis from Australian waters is P. sordida Hale, 1945 which has a dorsal conical tubercle on the carapace and maxilliped 2 with five dactylar teeth; the first one, more slender than in this species, is longer than the third tooth, and the fifth tooth is shorter.

Figures

Figure 42. Procampylaspis australiensis 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, 0.25; b, 0.5; c, 0.1; d, 0.2; e, 0.25.

Figure 43. Procampylaspis australiensis sp. nov. female paratype: a, pereopod 1; b, pereopod 2; c, pereopod 3; d, pereopod 4; e, pereopod 5; f, pleonite 6 and right uropod. Scale (in mm): a–f, 0.25.

Figure 44. Procampylaspis australiensis sp. nov. male allotype: a, body, lateral view; b, pleonite 6 and right uropod. Scale (in mm): a, 0.5; b, 0.25.