Procampylaspis jonesi, 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 : 1660-1667

Procampylaspis jonesi n. sp.

(gures 3– 6)

Material. HOLOTYPE female, 6.04 mm body length ( AM N H 18040), sta. V-17-7 ; PARATYPES: one male, 4.57 mm body length ( AM NH 18043 ), sta. V-17-5 ; one female ( AM N H 18052) , one female (G AN M N H Cum 153), one immature male ( AM N H 18075), sta. V-17-4 (dissected) ; one immature male ( AMNH 18045 ), sta. V-17-5 ;

f—female; m—male. one immature male ( AMNH 18048 ), one immature male ( GANMN H Cum 154), sta. V-17-7 .

Type locality. 40 ss 32 ¾ S, 75 ss 08 ¾ W, 3089–3279 m depth, SE Paci c Ocean, collected by R. V. ‘ Vema,’ 22 M arch 1961 .

Etymology. This species is dedicated to the memory of the late Norman S. Jones (1915–1997), ne scholar, teacher, person, one of the best-known authorities on the order Cumacea , and who described many species of Procampylaspis .

Description of female (gures 3, 4). Integument glabrous. Carapace (gure 3A) with very short ocular lobe, with small serration on antero-lateral corner. Antenna 1 (gure 3B) as usual for the genus. Labium as in gure 3C. Mandible (gure 3D) pars incisiva with four teeth; lacinia mobilis with three teeth; ve strong serrate setae between lacinia mobilis and thin truncate pars molaris. Maxilla 1 (gure 3F) outer endite with nine serrated setae and two smaller simple ones; palp with two laments, longer one with proximally directed setules on proximal half. Maxilla 2 (gure 3E) acuminated protopod with few ne setae on inner margin; endites with few simple and setulated apical setae. M axilliped 1 (gure 4A) endite of basis with an acuminate seta, plumose setae and a pair of retinacula; carpus long with four simple attened setae on inner margin and few simple and plumose setae; dactylus acuminate. Maxilliped 2 (gures 4B,C) propodus twice as long as carpus, with two setules on inner distal corner; tooth 5 of dactylus longer than 3, tooth 4 half as long as 3, with a small seta; limit between tooth 2 and 1 well marked, rst tooth as long as 3. M axilliped 3 (gure 4D) basis shorter than half of maxilliped, without outer process; 0.2; (D, E): 0.3.

merus with strong inner tooth and another on outer margin; carpus with two outer teeth; dactylus with four terminal setae. Pereopod 1 (gure 4E) basis shorter than half of pereopod; ischium longer than merus; carpus shorter than propodus; propodus longer than dactylus; dactylus with few short terminal setae. Pereopod 2 (gure 4F) basis shorter than half of pereopod; carpus twice as long as merus, with robust seta on inner distal corner; dactylus long, more than three times as long as propod us, with few setae. Exopod s on maxilliped 3 and pereopods 1 and 2. Pereopod 3 (gure 4G) basis much longer than half of pereopod, two plumose setae on outer margin. Pereopods 4 and 5 (gure 4H,I) with progressively shorter bases and longer carpus compared to third pair. Uropod (gures 4J,K) with peduncle twice as long as last pleonite, 1.5 times as long as endopod, few simple setae on inner margin; exopod shorter than endopod, with terminal seta as long as exopod; endopod with three strong setae on inner margin, and micro-serrated terminal seta shorter than endopod.

Description of male (gures 5, 6). Integument glabrous, as in female. Carapace (gure 5A) 60% of entire body length; with obscure antennal notch. Antenna 1 (gure 5B) second article of peduncle with small tubercle with sensory seta; main agellum as long as third article of peduncle, accessory agellum with three reduced articles. Maxilliped 3 (gure 5C) ischium with inner tooth; merus with inner tooth (broken in described specimen) and two outer teeth (broken in described specimen); carpus with two outer teeth, dactylus with terminal setae longer than in female. Pereopod 1 (gure 5D) as in female. Pereopod 2 (gure 5E) with greater number of plumose setae than in female; dactylus with two plumose terminal setae. Pereopods 3 and 4 (gures 6A,B) with narrower proximal half of bases than in female. Exopods on maxilliped 3 and pereopods 1–4. Pereopods 4 and 5 (gures 6B,C) with progressively shorter bases and longer carpi compared to third pair. Uropod (gures 6D –F) with peduncle three times as long as last pleonite, 1.75 times as long as endopod; exopod shorter than endopod (one exopod half broken and one endopod broken in adult examined male, gure 6D), with plumose subterminal setae and plumose terminal setae shorter than exopod (broken in adult male); endopod with six (in immature male, two of them broken, gures 6E,F) or seven robust setae (in adult male, two broken, gure 6D) and micro-serrated terminal seta shorter than endopod (broken in adult male).

Remarks. Procampylaspis jonesi n. sp. resembles P. acanthomma Jones, 1984 , in maxilliped 2, pereopods 1 and 2, and the uropod, but diOEers in its shorter ocular lobe with no spines and the number of teeth on maxilliped 3. P. jonesi n. sp. also resembles P. arguini Bacescu and Muradian, 1972 , from the eastern Atlantic in its carapace and maxillipeds, but diOEers in its pereopods 1 and 2 and uropod. With P. bonnieri Calman, 1906 , from the Atlantic, it shares similar maxillipeds and uropod, and with P. compressa Zimmer, 1907 , from Antarctic waters, similar maxilliped 3, pereopod 2 and uropod (diOEers by carapace, pereopods— P. bonnieri and by carapace, maxillipeds 1, 2 and the rest of pereopods). This new species seems most closely related to P. acanthomma which has been recorded from both sides of the Atlantic ( table 1).