Campylaspis anae, 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 : 131-132

Campylaspis anae sp. nov.

Figures 1 , 2

Material examined. Holotype female, NSW, off Nowra, 34°59.52'S, 151°05.94'E, 204 m, coarse shell, WHOI epibenthic sled, G.C.B. Poore et al., RV Franklin, 14 Jul 1986 (stn SLOPE 1 ), NMV J52946.

Diagnosis. Carapace with long lateral sulcus, rectangular in dorsal view. Maxilliped 3 with large merus and carpus. Uropod peduncle more than 2.5 times as long as pleonite 6; exopod a little shorter than endopod.

Description. Body with smooth integument. Length: 3.5 mm.

Antenna 1, basal article of peduncle longest, median and apical articles equal; main flagellum 3-articulate, accessory flagellum minute, uniarticulate.

Maxilliped 2 basis (fused with ischium) and merus with long plumose seta on distal inner corner, carpus produced bluntly between 2 simple setae on inner margin, propodus longer than carpus, as long as its distal outer strong seta, dactylus with 3 teeth shorter than propodal seta. Maxilliped 3 basis less than half as long as appendage, with serrated inner margin, with plumose seta on inner and outer distal corners, without outer process; ischium small; merus much bigger (second longest article), with serrated margins and plumose seta on outer distal corner; carpus as long as its distal outer strong seta, dactylus with 3 teeth shorter than propodal seta. Maxilliped 3 basis shorter than half length of appendage, with serrated inner margin, with plumose seta on inner and outer distal corners, without outer process; ischium small; merus larger (second longest article), with serrated margins and plumose seta on outer distal corner; carpus 0.65 of merus length, large, with strong serration on outer margin, 1 plumose seta on outer distal corner; propodus little shorter than carpus, much thinner; dactylus less than half of propodus, with 2 microserrate terminal setae twice dactylus length.

Pereopod 1 basis less than half as long as appendage, with serrated margins; merus 2.6 times as long as ischium; carpus to dactylus progressively shorter, with numerous simple setae on both margins, dactylus with long terminal simple setae. Pereopod 2 basis less than half as long as appendage, with a plumose seta on inner distal corner; merus 4 times as long as ischium, with long plumose seta on inner margin; carpus 1.4 times as long as ischium and merus combined, 2 simple setae on its inner distal corner; dactylus with broken tip, 4 times as long as propodus, with several simple setae marginally. Pereopod 3 basis longer than rest of appendage, ischium as long as merus, ischium and merus with simple seta on inner distal corner; carpus twice as long as merus; dactylus with long stout terminal seta. Pereopods 4 and 5 with shorter basis and longer carpus than pereopod 3. Exopods on maxilliped 3 and pereopods 1, 2.

Uropod peduncle more than 2.5 times as long as pleonite 6, with strong serrated inner margin and median crest, twice as long as exopod; exopod shorter than endopod, with subterminal and terminal (much longer) stout setae; endopod with median crest, with 4 microserrate setae on inner margin and a long stout terminal seta.

Etymology. The species is dedicated to my lovely daughter, Ana-Maria.

Distribution. Off Nowra, NSW; 204 m depth.

Remarks. Campylaspis anae has a large lateral sulcus that does not reach the posterior extremity of the carapace. No other species previously known from Australia or from the western Pacific has such a sulcus. The shape of the carapace is similar to that of C. ovalis Stebbing, 1912 from South Africa which has an even larger sulcus that is confluent with the posterior extremity of the carapace. Of the 16 new species with a lateral sulcus described herein, C. anae is closest to the immature male holotype of C. rectangulata . It differs from C. rectangulata in possessing longer teeth on maxilliped 2, the merus of maxilliped 3 without a concavity and larger, the dactylus of maxilliped 3 with shorter setae, the uropod with a longer and wider peduncle with a longitudinal median crest, shorter rami, and an endopod with four microserrate setae on its inner margin (3 similar setae in C. rectangulata ).

Figures

Figure 1. Campylaspis anae sp. nov. female holotype: a, body, lateral view; b, body, dorsal view; c, antenna 1; d, maxilliped 2; e, maxilliped 3. Scale (in mm): a, b, 1; c, e, 0.25; d, 01.

Figure 2. Campylaspis anae sp. nov. female holotype: 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, 0.25.