Procampylaspis spinosa, Petrescu, 2001

Petrescu, I., 2001, New deep-sea Nannastacidae (Crustacea, Cumacea) from the Eastern Pacifc collected by R. V.`Vema’, Journal of Natural History 35 (11), pp. 1657-1680 : 1672-1675

Procampylaspis spinosa n. sp.

(gures 11–14)

Material. HOLOTYPE male ( AM NH 18047 ), sta. V-15-62, 5.57 mm body length (partially dissected) ; PARATYPES: one female ( AM NH 18051 ), sta. Yelcho 2-11, 4.18 mm body length (partially dissected); one manca ( AM N H 18044), sta. V-15-62 .

Type locality. 01 ss 30 ¾ S, 82 ss 19 ¾ W, 1363–1369 m depth, SE Paci c Ocean, collected by R. V. ‘ Vema,’ 3 D ecember 1958 .

Etymology. This species has a very spiny integument.

Description of male (gures 11, 12). Integument hexagonally reticulated, like a honeycomb. Carapace (gure 11A) 35% of entire body length; nine pairs of dorsal teeth, two of them on ocular lobe; ocular lobe long (not exceeding pseudorostrum), with pair of short dorsal spines, with strong teeth on antero–ventral margin. Pereon with dense spines and ne setae. Pleon also densely spiny, with antennal groove delimited by rows of spines; long setae on each pleonite; rows of dorsal spines on all segments (gure 11B). M axilliped 3 (gure 11C) basis with inner serrated margin; ischium with large spine on inner margin; merus with two large robust setae on inner margin, a smaller one at base of carpus and a very long one at base of its outer plumose seta; carpus with inner seta; dactylus with long simple terminal setae. Pereopod 1 (gure 12A) basis to carpus with serrated margins; ischium shorter than merus; merus longer than carpus, shorter than propodus; dactylus slender with short terminal setae. Pereopod 2 (gure 12B) basis and merus with serrated margins; carpus with two unequal setae on inner distal corner; dactylus almost twice as long as propodus, with few ne setae and long plumose terminal seta. Pereopods 3 and 4 (gure 12C,D) basis pyriform with serrated margins; basis, ischium and merus with plumose setae. F ive pairs of exopods. Pereopod 5 (gure 12E) with shorter basis and longer carpus than in previous two pairs. Uropod (gure 12F) with peduncle three times as long as last pleonite, with serrated margins and eight plumose setae on inner margin, 1.56 times as long as endopod; exopod shorter than endopod, with simple terminal seta; endopod with seven robust setae on outer margin, two subterminal robust setae and stronger terminal microserrate seta.

Description of female (gure 13, 14). Integument as in male. Carapace (gure 13A) with a dorsal row of spines. No ventral serration. Ocular lobe strong, without spines. Pereon and pleon with very reduced dorsal serration, without spines as in male. Antenna 1 (gure 13B) rst article of peduncle with strong inner serration. Maxilliped 2 (gures 13C,D) with dactylar tooth 5 as long as 3, tooth 4 with small seta, half as long as tooth 3, tooth 2 well-delimited, tooth 1 shorter than 3. M axilliped 3 (gure 13E) merus with three inner teeth and one outer tooth; dactylus also with long terminal setae. Pereopod 1 (gure 14A) with densely setose margins; ischium as long as merus and propodus; carpus shorter than propodus; dactylus with simple terminal setae. Pereopod 2 (gure 14B) with fewer setae on articles; carpus with one inner spine; dactylus 2.2 times as long as propodus, with short plumose setae on both sides and longer plumose terminal setae. Pereopod 3 (gure 14C) with long basis with setules and plumose setae on outer margin. Pereopods 4 and 5 as shown in gures 14D,E. Uropod (gure 14F) with peduncle 2.9 times longer than last pleonite, more than 2.3 times as long as endopod, with small setae on both sides; ratio of length exopod/ endopod greater than in male; endopod with two inner microserrate setae; both rami with terminal phanerae broken.

(A–F): 0.5.

Remarks. Procampylaspi s muradiana e n. sp. is most closely related to P. bonnieri which has more spines on its body and a similar maxilliped 2. It diOEers from the latter in having a longer ocular lobe, more numerous spines on the carapace and pleon, more plumose setae on the uropod al peduncle and more setae on the endopod. Its maxilliped 2 also resembles that of Procampylaspis cornuta n. sp. ( table 1).

Identi cation key to species of Procampylaspis in the SE Paci c 1 Carapace with tubercles, spines or horns............ 2 – Carapace without tubercles, spines or horns............ 4

2 Carapace with tubercles............ P. muradianae n. sp. – Carapace with spines or horns............... 3 3 Carapace with spines, long ocular lobe......... P. spinosa n. sp. – Carapace with horns, short ocular lobe......... P. cornuta n. sp.

4 Long ocular lobe............... P. ledoyeri n. sp. – Short ocular lobe............... P. jonesi n. sp.