Campylaspis hirsuta, 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 : 139-140

Campylaspis hirsuta sp. nov.

Figures 14 , 15

Material examined. Holotype male, Vic., south of Point Hicks , 38°25'S, 149°00'E, 1500 m, compacted clay, WHOI epibenthic sled, G.C.B. Poore et al., RV Franklin, 22 Jul 1986 (stn SLOPE 27 ), NMV J52411.

Paratype: 1 immature male (stn SLOPE 46 ), NMV J52951 .

Diagnosis. Carapace with 2 rows of dorsal tubercles provided with strong spines, spines on top of pseudorostrum, external row of tubercles with stronger spines, large lateral sulcus. Dorsal spines on pereon and pleon. Maxilliped 2 with dactylar teeth. Maxilliped 3 with long terminal seta on dactylus. Dactylus of pereopod 2 as long as propodus and carpus combined. Uropod peduncle 1.7 times as long as pleonite 6, 1.6 times as long as endopod.

Description. Body with integument strongly calcified. Length: 4.7 mm.

Carapace 0.4 body length, 1.8 times as long as high, with large lateral sulcus, pair of tubercles with strong spines at the posterior corners of the frontal lobe, 3 pairs in the median part and pair of smaller ones on posterior extremity, exterior row of 3 strong tubercles with spines on each side, ocular lobe acute, without eyes, pseudorostral lobes large and rounded, little upturned, with spines and long simple setae at the tip, antennal notch marked, anteroventral corner acute, ventral serration strong, long simple dorsal setae.

Antenna 1, median and distal article of peduncle subequal, shorter than main flagellum 3-articulate, accessory flagellum tiny, uniarticulate.

Maxilliped 2 with strong plumose seta on distal inner corner of basis and merus, ischium not visible, 2 simple setae on inner margin of carpus, propodus second longest article, with robust seta on distal outer corner, longer than dactylar teeth, dactylus with 3 teeth, median one shorter. Maxilliped 3 basis half entire appendage, with 2 short plumose setae and short distal serration on inner margin, 2 long plumose setae on outer distal corner, merus second longest article, with serrated inner margin, with tooth and plumose seta on outer margin, short carpus with serrated outer margin, propodus 1.4 times as long as carpus and twice as long as dactylus, dactylus with terminal simple long seta, 3 times dactylus length.

Pereopod 1 basis little less than half as long as appendage, with 2 long plumose setae on inner margin, serration on both distal sides, ischium with serrated inner margin with long plumose seta, merus second longest article, with numerous setae on both margins, carpus little shorter than merus, densely setose, propodus shorter than carpus, with numerous setae, twice as long as dactylus, dactylus with short simple setae. Pereopod 2 basis less than one-third rest of articles combined, with plumose seta on inner distal corner, simple seta on inner margin of merus, carpus 1.9 times as long as merus, short simple seta and longer plumose seta on its distal inner corner, dactylus 3.5 times as long as propodus, as long as propodus and carpus combined, with simple setae on both margins, subterminal and terminal simple long setae. Pereopod 3 basis large, plumose seta on distal inner corner of ischium and merus, carpus little longer than merus, with 2 plumose setae on outer margin and robust seta on outer distal corner, small dactylus with stout terminal seta. Pereopod 4 similar to pereopod 3, with smaller basis and longer carpus. Pereopod 5 with 1 plumose seta on outer margin of carpus. 5 pairs of exopods incompletely developed.

Uropod peduncle 1.7 times as long as pleonite 6, 1.6 times as long as endopod, 3 proximal teeth and 4 simple setae on inner margin, exopod little shorter than endopod, with short simple subterminal seta, another seta on inner margin and robust microserrate terminal seta, endopod with 4 microserrate setae on inner margin, subterminal simple seta and terminal robust microserrate seta.

Etymology. The species is named “ hirsuta ” because of its integument with numerous setae and spines.

Distribution. South of Point Hicks, Vic., off Freycinet Peninsula, Tas.; 720–1500 m depth.

Remarks. Such a combination of characters, tubercles with spines on the carapace, carapace with a lateral sulcus, plus dorsal spines on the pereon and pleon as in Campylaspis hirsuta , is unique among species of Campylaspis . C. spinosa Calman, 1906 from the Mediterranean and the Atlantic Ocean has acute tubercles without spines on the carapace and dorsal spines on the pereon and pleon. The uropod endopod of C. hirsuta has four microserrate setae on the inner margin instead of three as in C. spinosa

Figures

Figure 14. Campylaspis hirsuta sp. nov. female holotype: a, body, lateral view; b, carapace, dorsal view; c, antenna 1; d, maxilliped 2 Scale (in mm): a, b, 0.5; c, 0.25; d, 0.3.

Figure 15. Campylaspis hirsuta sp. nov. female 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–f, 0.5; g, 0.25.