Campopera caribbensis sp. nov.

(Figs. 387, 388)

Typematerial. Holotype (intact ♀, MNHN-IU-2014- 21423) anddissectedparatype (♀, figured) from Botryllus planus (Van Name, 1902) (MNHN-IT-2008-1729 = MNHNS1/BOT.B/21), W. Îleta Cochons, Guadeloupe Stn 13, depth 5-10 m, Monniot coll., 23 December 1980 .

Etymology. The name of the new species is derived from the Caribbean.

Descriptionoffemale. Body (Fig. 387A) resembling that of C. magellanica sp. nov., but segmentation of prosome more obscure. Body length 2.05 mm. Cephalosome indistinctly defined from metasome. Urosome 4-segmented (Fig. 387B), distinctly narrower and shorter than prosome; first urosomite (genital complex) notarticulated from prosome; genital apertures not discernible. Three free abdominal somites indistinctly articulated. Caudalramus (Fig. 387C) small, lobate, about twiceaslongas wide (55×25 μm),fusiform, notarticulated from anal somite, ornamented with many setules: caudal setae absent.

Rostrum (Fig. 387D, E) large, smooth, tapering in distal two-thirds towards rounded apex. Antennule (Fig. 387E) lobate, unsegmented, shorter than rostrum, blunt tipped, sparsely ornamented with minute setules over distal surface; setae apparently absent. Antenna (Fig. 387F) robust, 4-segmented; coxa, basis, and first endopodal segment unarmed, each much wider than long; distal endopodal segment about 1.4 times longerthan wide (45×33 μm): armedwith 4 smallsetae, 2 inserted into basal part of terminal claw; terminal claw strong, straight, aslongas segment.

Labrum convex posteriorly. Mandible (Fig. 387G) with broad coxal gnathobase bearing 3 major teeth and several minute denticles on medial margin, and bluntly produced, spinulose proximal corner; 3 major teeth each bearing 3 or 4 spinules on proximal margin; distalmost tooth with 1 minute denticle at base of distal margin: palp consisting of obscurely defined exopod bearing 5 short, naked setae and basis-endopod complex bearing 3 small, naked setae, one originating from basis region and remaining 2 more distally. Maxillule (Fig. 387H) bearing 8 setae on arthrite, 1 broad seta on coxal endite, 2 on epipodite; exopod and endopod fused with basis, bearing 4 setae each on exopodal region and endopodbasis complex; all setae pinnate. Maxilla (Fig. 387I) 3- segmented; syncoxa bearing 2 endites, each tipped with 2 setae; basiswith 1 setaplusmassive clawbearing 2 rows of thick setules distally; endopod 1-segmented, rudimentary, tipped with 2 thin setae. Maxilliped (Fig. 387J) lobate, armed with 4 unequal, naked setae (2 subdistal and 2 distal).

Legs 1–4 (Fig. 388 A-D) biramous; both rami fused with protopod in all legs. Leg 1 with protopod retaining trace of articulation and bearing inner distal setaon basis region. Exopods of legs 1–4 larger than endopods. Exopod of leg 1 incompletely 2-segmented, but endopod and both rami of other legs unsegmented, lobate. Minute setae present: 6, 10, 7, and 5 on exopods of legs 1–4, respectively, and 4, 4 (or 5), 6, and 3 (or 4) on endopods of legs 1–4, respectively. Legs 5 and 6 absent.

Male. Unknown.

Remarks. Campopera caribbensis sp. nov. differs from itstwo congeners in havingan unsegmentedantennule compared to the 2-segmented limb present in both C. michaelseni and C. magellanica sp. nov. In addition, the maxillary syncoxa has 2 endites in the new species in contrast to 3 endites in both of its congeners, and the maxillary endopod has only 2 setae, in contrast to 3 setaein C. michaelseni and 4 setaein C. magellanica sp. nov.