Procampylaspis 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 : 159-161

Procampylaspis spinifera sp. nov.

Figures 47–50

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 J53003.

Allotype male: (stn SLOPE 45 ), NMV J53004.

Paratypes: 2 immature males (stn SLOPE 46 ), NMV J53006 ; 1 female, dissected (stn SLOPE 45 ), NMV J53007 ; 1 male, dissected (stn SLOPE 46 ), NMV J53008 ; 1 female (stn SLOPE 46 ), MGAB CUM 1619 .

Diagnosis. Carapace with 5 pairs of dorsal spines, pair of spines on top of ocular lobe, anterolateral margin with strong serration. Pair of dorsal spines on pereonites 3–5 and pleonite 1. Strongly serrated basal article of antenna 1 peduncle. Maxilliped 2 with 5 dactylar teeth, 1st one as long as 3rd, 5th tooth twice as long as 3rd tooth. Maxilliped 3 with strong tooth on outer margin of merus. Pereopod 1 with merus longer than carpus but shorter than propodus. Pereopod 2 with spine on inner margin of merus, dactylus 2.8 times as long as propodus. Dactylus of pereopods 3–5 fused with terminal seta. Uropods with serrated peduncle, 2.27 times as long as pleonite 6, 1.9 times as long as endopod, exopod 0.7 endopod length, endopod with 3 microserrate setae on inner margin.

Description of female. Body without setae on integument. Length: 4.1 mm.

Carapace 0.43 body length, 2.1 times as long as high, with 5 pairs of dorsal spines, pair of spines on top of ocular lobe, ocular lobe long, without eyes, anterolateral margin with strong serration. A pair of dorsal spines on pereonites 3–5 and pleonite 1.

Antenna 1 basal article of peduncle with 3 strong teeth on inner margin, peduncle with progressively shorter articles, main flagellum 3-articulate, much longer than distal article of peduncle, accessory flagellum minute, uniarticulate.

Maxilliped 2 with pappose seta on inner margin of basis and merus, merus to propodus with serrated outer margin, propodus 2nd longest article, with plumose seta on outer margin, dactylus with 5 teeth, 1st one as long as 3rd, 5th tooth twice as long as 3rd tooth. Maxilliped 3 basis almost half of appendage, with plumose seta on inner margin and 2 longer setae on outer margin, ischium with tooth on inner margin, strong tooth on outer margin of merus, 3 teeth on outer margin of carpus, propodus shorter than carpus, dactylus shorter than propodus, dactylus with simple long terminal setae.

Pereopod 1 basis less than half as long as appendage, with merus longer than carpus, but shorter than propodus, dactylus with simple terminal setae. Pereopod 2 basis shorter than rest of articles combined, with spine on inner margin of merus, carpus 1.4 times as long as merus, with 3 stout setae on distal inner corner, dactylus 2.8 times as long as propodus, with simple setae. Pereopods 3–5 with progressively shorter basis, with plumose seta on outer margin and longer carpus (carpus twice as long as merus in 5th pair), dactylus fused with terminal seta. Exopods on maxilliped 3 and pereopods 1, 2.

Uropod with serrated peduncle, 2.27 times as long as pleonite 6, 1.9 times as long as endopod, exopod 0.7 endopod length, with short subterminal stout seta and longer terminal robust seta, endopod with 3 microserrate setae on inner margin and more robust and longer terminal seta.

Description of male. Body length: 5.4 mm. Carapace with median dorsal small tubercle and pair of tubercles near posterior extremity, pair of small tubercles on top of eyeless ocular lobe not reaching extremity of pseudorostrum, lower margin shortly serrated in anterior half.

Maxilliped 2 with 3rd tooth of dactylus more slender than in female. Maxilliped 3 with more serrated basis and merus on inner margin, carpus with 2 teeth on inner margin (3 in female).

Pereopod 1 as in female, with larger basis. Pereopod 2 with fewer stout distal setae on carpus, dactylus with terminal plumose seta instead of simple one in female, larger basis. Pereopod 5, with longer carpus than in female. Exopods, 5 pairs.

Uropod peduncle with serrated margins and numerous plumose setae on inner margin, 1.7 times as long as pleonite 6, 1.8 times as long as endopod, exopod 0.8 of endopod length, with subterminal and terminal stout simple seta, endopod with 6 stout setae on inner margin, seta subterminal and robust longer terminal seta.

Etymology. The Latin name “ spinifera ” describes the presence of numerous spines on the body and appendages.

Distribution. Off Freycinet Peninsula, Tas.; 720–800 m depth.

Remarks. P. spinifera is close to P. spinosa Petrescu, 2001 from the south-eastern Pacific Ocean (American coast), both having numerous dorsal spines on the carapace. These number five pairs in females of P. spinifera and 12 in females of P. spinosa . The setae on the dactylus of pereopod 2 are simple in P. spinifera while plumose in P. spinosa .

Figures

Figure 47. Procampylaspis spinifera sp. nov. female paratype: a, body, lateral view; b, body, dorsal view; c, carapace, dorsal view; d, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 1; c, 0.2; d, 0.25; e, 0.25.

Figure 48. Procampylaspis spinifera 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–e, 0.5; f, 0.25.

Figure 49. Procampylaspis spinifera sp. nov. male allotype: a, body, lateral view; b, body, dorsal view; c, maxilliped 2. Scale (in mm): a, b, 1; c, 0.2.

Figure 50. Procampylaspis spinifera sp. nov. male allotype: a, maxilliped 3; b, pereopod 1; c, pereopod 2; d, pereopod 3; e, pereopod 4; f, pereopod 5; g, pleonite 6 and right uropod. Scale (in mm): a–e, 0.5; f, g, 0.25.