Procampylaspis ledoyeri, 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 : 1667-1669

Procampylaspis ledoyeri n. sp.

(figures 7, 8)

Material. HOLOTYPE male ( AM NH 18049 ), sta. V-17-4, 5.20 mm body length ; PARATYPE: one male ( AMNH 18042 ), sta. V-17-7 (partially dissected).

Type locality. 37 ° 10 ' S, 77 ° 42.5 ' W, 4116 m depth, SE Pacific Ocean , collected by R.V. ‘Vema,’ 15 M arch 1961.

Etymology. This species is dedicated to the French specialist in Cumacea, Dr Michel Ledoyer , who has contributed greatly to knowledge of this deep-sea genus in the Indian Ocean.

Description of male. Integument with few thin setae. Carapace (figures 7A,B) 42% of entire body length; thin ocular lobe reaching tip of pseudorostral lobes, with small spine dorsally; anteroventral margin of carapace with short strong serration. Pereon with dorsal spines. Pleon with a pair of denticles on distal part of antennal groove of each pleonite; additional denticles on fi fth pleonite. Antenna 1 (figure 7C) peduncle with thin articles; fi rst article of peduncle longest; main fl agellum longer than last article of peduncle; long sensory setae on basis of main fl agellum and on accessory fl agellum. Maxilliped 2 (figures 7D,E) basis with two long plumose setae on outer margin, one on merus and two on carpus; length ratio of propodus/ carpus =1.33; dactylus tooth 1 shorter than 3, separated by large groove from twice smaller tooth 2, tooth 4 curved with a seta, half as long as tooth 3, tooth 5 longest. Maxilliped 3 (figure 7F) basis longer than half of maxilliped; ischium with inner tooth; merus with one inner and two outer teeth; carpus slightly smaller than merus, with three long teeth; dactylus with long simple terminal setae. Pereopod 1 (figure 7G) basis shorter than half of pereopod; ischium slightly longer than merus; carpus slightly longer than propodus; dactylus with short simple terminal setae; plumose setae on basis of propodus. Pereopod 2 (figure 8A) basis shorter than half of pereopod; length ratio of carpus/merus =1.4, with two short robust setae on distal inner corner of carpus; dactylus 3.8 times as long as propodus, with plumose setae on both sides and long plumose terminal seta. Pereopod 3 (figure 8B) basis longer than half of pereopod, swollen in proximal half; carpus four times as long as merus. Pereopods 4 and 5 (figures 8C,D) with progressively shorter bases and longer carpi (4.6 times as long as merus on fi fth pair) compared to third pair. Carpus, propodus and dactylus of last three pairs of pereopods with long simple setae. Exopods on maxilliped 3 and pereopods 1–4. Uropod (figures 8E,F) peduncle three times as long as last pleonite, 1.75 times longer than endopod, with ten plumose setae on inner margin; exopod shorter than endopod (68% of endopod length), with two plumose terminal setae; endopod with eight long micro-serrate setae on inner margin and micro-serrated terminal seta much shorter than endopod.

Remarks. Procampylaspis ledoyeri n. sp. resembles many Atlantic and Pacific species: P. acanthomma (similar in ocular lobe with a spine, shape of pereopods 1 and 2; diOEering in longer ocular lobe and maxilliped 2), P. bituberculata Hansen, 1920 (similar only in the uropod; diOEering in all remaining characters), P. bonnieri (similar in spines on pereon and denticles on pleon, maxillipeds 2 and 3; diOEering in all remaining characters), P. armata Bonnier, 1896 (similar in pereon and pleon with spines and denticles; diOEering in maxillipeds 2 and 3, pereopods 1 and 2, and uropod), P. lutensis Jones, 1984 , P. procurens Jones, 1984 , P. maurini Bacescu and Muradian, 1972 (last three species similar only in maxilliped 2) and P. unicornis Gamo, 1977 (similar in maxilliped 2 and pereopod 2; diOEering in all remaining characters). Procampylaspis ledoyeri n. sp. seems to be most closely related to P. armata from the eastern Atlantic ( table 1 ).