Campylaspis edenensis, 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 : 135-136

Campylaspis edenensis sp. nov.

Figures 7–9

Material examined. Holotype female, NSW, off Eden, 37°07.30'S, 150°20.20'E, 520 m, grey coarse shell, WHOI epibenthic sled, G.C.B. Poore et al., RV Franklin, 20 Jul 1986 (stn SLOPE 19 ), NMV J52956.

Allotype: immature male, type locality, NMV J52957.

Paratypes: 3 females (stn SLOPE 19 ), NMV J52958 ; 2 females (stn SLOPE 19 ), MGAB CUM 1612 ; 1 female, dissected (stn SLOPE 19 ), NMV J52959 .

Diagnosis. Carapace with large, long lateral sulcus not reaching dorsal crest. Median dactylar tooth of maxilliped 2 longer than other two. Maxilliped 3 basis more than one-third of entire appendage. Pereopod 1 with numerous plumose setae on both sides. Pereopod 2 with digitiform tip of dactylus, with long simple subterminal seta. Pereopods 3–5 robust, dactylus fused with terminal seta. Uropod peduncle 1.7 times as long as pleonite 6, subequal rami.

Description of female. Body with well calcified glabrous integument. Length: 3.3 mm.

Carapace half body length, 2.2 times as long as high, large and long lateral sulcus not reaching dorsal crest, upper margin ending on tip of pseudorostrum, transverse ridge on sulcus at base of ocular lobe, large ocular lobe without eyes, numerous dorsal clear lenses, antennal notch small, ventral margin smooth, dorsal crest posteriorly. Pereon with 4 free thoracic segments. Pleon 0.38 body length.

Antenna 1 peduncle with serrated margins, proximal article longest, main flagellum 3-articulate, longer than distal article of peduncle, accessory flagellum tiny, uniarticulate.

Maxilliped 2 basis fused with ischium, with plumose seta on inner distal corner, similar seta medially disposed on merus, carpus with short tooth and 2 simple setae on inner margin, propodus second longest article, with small tooth on inner margin and outer stronger seta, longer than dactylar teeth, dactylus fused with its 3 teeth, median one the longest. Maxilliped 3 basis more than one-third of entire maxilliped, with plumose seta on inner distal corner and 2 longer setae on outer distal corner, merus second longest article, with serrated margins, stronger on outer margin, with plumose seta on outer distal corner, carpus as long as propodus, with 4 teeth on inner margin and 2 on outer one, propodus with 2 teeth and 4 pappose setae on inner margin, 3 teeth on outer margin, dactylus 0.35 of propodus, with simple short setae.

Pereopod 1 basis more than one-third of entire appendage, with serrated inner margin, plumose setae on basis to propodus, merus twice as long as ischium, carpus as long as propodus, with strong inner serration, dactylus 0.6 of propodus length, with simple short setae. Pereopod 2 basis little less than one-third of appendage, basis and merus with plumose seta on inner distal corner, merus 5 times as long as ischium, carpus 1.3 times as long as merus, with plumose seta and simple seta on distal inner corner, dactylus 3.5 times as long as propodus, with digitiform tip, few simple short setae on both margins, 3 subterminal simple setae, 1 much longer. Pereopods 3–5 with progressively shorter basis and longer carpus, carpus twice as long as merus in last pair, with simple robust seta on distal outer corner, dactylus fused with its terminal robust seta. Exopods on maxilliped 3 and pereopods 1, 2.

Uropod with robust peduncle 1.7 times as long as pleonite 6, twice as long as rami, with serrated inner margin, exopod slightly shorter than endopod, with terminal longer robust seta, endopod with 2 stout setae on serrated inner margin, robust terminal seta shorter than endopod; terminal setae on rami with single subterminal setule.

Description of male. Body length: 3.5 mm.

Carapace with stronger ridges than in female.

Uropod peduncle 1.5 times as long as pleonite 6, twice as long as endopod, exopod little shorter than endopod, with 2 subterminal setae and a longer, more robust, terminal one, endopod larger than exopod, with terminal robust seta and 5 stout short setae on inner margin.

Etymology. The new species bears the name of Eden, a port town in south-eastern Australia.

Distribution. Off Eden, NSW; 520 m depth.

Remarks. The two species most similar to Campylaspis edenensis are C. calmani Petrescu, 1995 and C. angelae . Campylaspis edenensis is differentiated from C. calmani by having the sulcus not bordered by small tubercles and the dactylus of pereopod 2 with a digitiform tip. Campylaspis edenensis differs from C. angelae by a lack of carapace tubercles, dorsal serrated crests on the pereon and pleon, and the longitudinal crest on the uropod peduncle.

Figures

Figure 7. Campylaspis edenensis sp. nov. female paratype: a, body, lateral view; b, body, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 0.5; c, d, 0.2; e, 0.25.

Figure 8. Campylaspis edenensis sp. nov. female paratype: 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–f, 0.5.

Figure 9. Campylaspis edenensis sp. nov. male allotype: a, body, lateral view; b, carapace, dorsal view; c, pleonite 6 and left uropod. Scale (in mm): a, b, 1; c, 0.25.