Campopera caribbensis, Kim & Boxshall, 2020

Kim, Il-Hoi & Boxshall, Geoff A., 2020, Untold diversity: the astonishing species richness of the Notodelphyidae (Copepoda: Cyclopoida), a family of symbiotic copepods associated with ascidians (Tunicata), Megataxa 4 (1), pp. 1-6 : 577-580

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 = MNHNS 1/ 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.

Figures

FIGURE 387. Campopera caribbensis sp. nov., female. A, habitus, right; B, urosome, ventral; C, caudal ramus; D, cephalic region, ventral; E, rostrum and antennules; F, antenna; G, mandible; H, maxillule; I, maxilla; J, maxilliped. Scale bars: A, 0.2 mm; B, D, 0.1 mm; C, F–J, 0.02 mm; E, 0.05 mm.

FIGURE 388. Campopera caribbensis sp. nov., female. A, leg 1; B, leg 2; C, leg 3; D, leg 4. Scale bars: 0.05 mm.