New deep-sea Nannastacidae (Crustacea, Cumacea) from the Eastern Pacifc collected by R. V.`Vema’ Author Petrescu, I. text Journal of Natural History 2001 2001-12-30 35 11 1657 1680 journal article 10.1080/002229301317092388 1464-5262 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. FIG. 1. Procampylaspis cornuta n. sp. , female AM N H 18041: (A) body, lateral view; (B) carapace, dorsal view; (C) ant enna 1; (D) maxilliped 2; (E) right maxilliped 2 dactylus, magni ed; (F) left maxilliped 2 dactylus, magni ed. Scales (mm): (A, B): 0.5; (C): 0.25; (D): 0.1; (E, F): 0.1. FIG. 2. Procampylaspis cornuta n. sp. , female AM N H 18041: (A) maxilliped 3; (B) pereopod 1; (C) pereopod 2; (D) pereopod 3; (E) pereopod 4; (F) pereopod 5; (G) uropod. Scales (in mm): (A, C–F): 0.3; (B): 0.2; (G): 0.1. 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 ).