Procampylaspis cornuta, 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 : 1658-1660

Procampylaspis cornuta n. sp.

(gures 1, 2)

Material. HOLOTYPE male ( AM N H 18041), sta. V-15-67, 2.78 mm body length.

Type locality. 09 ss 43 ¾ S, 80 ss 04 ¾ W, 2816–2846 m depth, SE Paci c Ocean, collected by R. V. ‘ Vema,’ 8 D ecember 1958 .

Etymology. This species has a pair of horns on the ocular lobe.

Description. Integument glabrous. Carapace (gures 1A,B) 79% of entire body length, oval in dorsal view; pair of teeth on tip of ocular lobe; with small antennal notch and serrate antero–ventral margin. Antenna 1 (gure 1C) main agellum with two articles, longer than last article of peduncle; accessory agellum with three short articles and two long apical sensory setae (very characteristic of the genus). Maxilliped 2 (gures 1D –F) with hyaline serration on inner margins of carpus and propodus; tooth 5 of dactylus as long as tooth 3, 4 half as long as 3, with a setule, tooth 1 twice as long as 2. Maxilliped 3 (gure 2A) basis comprising almost half of its length, without distal outer process; ischium with inner tooth; merus with three inner teeth and three longer teeth on outer margin; carpus with three outer teeth; dactylus with two serrate terminal setae and one peculiar biserrated spine. Pereopod 1 (gure 2B) basis comprising half of its length; ischium as long as merus; carpus as long as propodus, longer than dactylus. Pereopod 2 (gure 2C) carpus with a spine on inner distal corner, dactylus broken in only specimen. Exopods on maxilliped 3 and pereopods 1 and 2. Pereopod 3 (gure 2D) with long and thin articles, basis longer than half of its length. Pereopods 4 and 5 (gures 2E,F) with progressively shorter bases. Uropod (gure 2G) peduncle 2.78 times as long as last pleonite, with small setae on inner margin, 1.73 times as long as endopod; exopod 77% as long as endopod, with long simple apical seta and two setules on inner margin; endopod with three long robust setae on inner margin, two subterminal spines (inner one longer) and setulated terminal spine, shorter than exopod seta.

Remarks. Procampylaspis cornuta n. sp. belongs to the group of Procampylaspis species with very short ocular lobes, including P. jonesi n. sp. Maxilliped 2 of P. cornuta resembles those of P. acanthomma Jones, 1984 (which has a longer ocular lobe), P. lutensis Jones, 1984 (which has a dorsal spine on carapace) and P. spinosa n. sp. (which has more spines on the carapace) ( table 1).