Campodelphys stocki, Kim & Boxshall, 2020
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publication ID |
https://doi.org/ 10.11646/megataxa.4.1.1 |
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DOI |
https://doi.org/10.5281/zenodo.6422162 |
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persistent identifier |
https://treatment.plazi.org/id/03C487CB-ED03-3860-FCEF-F85BFE94F8E6 |
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treatment provided by |
Plazi |
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scientific name |
Campodelphys stocki |
| status |
gen. et sp. nov. |
Campodelphys stocki gen. et sp. nov.
( Figs. 400 View FIGURE 400 , 401 View FIGURE 401 )
Typematerial. Holotype (intact ♀, MNHN-IU-2014-21432 ) , paratype (intact ♀, MNHN-IU-2014-21433), and dissected paratype (♀, figured) from Eudistoma vulgare Monniot F., 1988 (MNHN-IT-2008-4307 = MNHNA 3/ EUD /58), Grand récif Sud New Caledonia, “Vauban”, (22°36.3’S, 167°14.2’E), depth 20-60m, B. Richer de Forges-IRD coll., 24 January 1985.
Etymology. The new species is named in honour of the late Prof. Jan H. Stock for his many contributions to the taxonomy of ascidicolous copepods.
Descriptionoffemale. Body ( Fig. 400A View FIGURE 400 ) elongate, cylindrical, archedventrally: bodylength 1.78 mm. Prosome unsegmented and evenly cylindrical (width 320 μm) along most of length; cephalosome tapering anteriorly, not articulated from metasome, narrower than metasome, withprominentposteroventral tubercle oneach side ( Fig. 400D View FIGURE 400 ). Anterior region from rostrum to level of leg 4 occupying about one-third of prosome length. Free urosome ( Fig. 400B, C View FIGURE 400 ) small, 122 μmlong, 5 urosomites each markedly wider than long. Anal somite ornamented with 2 oblique rows of spinules on ventral surface near bases of caudal rami ( Fig. 400E View FIGURE 400 ). Caudal ramus small, about 2.4 timeslongerthan wide (38×16 μm), obscurely defined from anal somite: armed with 6 equal, naked setae (2 in middle and 4 distal).
Rostrum ( Fig. 400F View FIGURE 400 ) elongate, about twice as long as wide, with slightly convex lateral margins bearing pair of setules distally; distal third narrowing towards apex. Antennule ( Fig. 400G View FIGURE 400 ) small, 82 μmlong, tapering, and curved posteriorly; segmentation obscure with 6 partial sutures along posterior surface; setae grouped as 2, 21, 6, and 13. Antenna ( Fig. 400H View FIGURE 400 ) very stout, 3-segmented; coxa short; basis slightly longerthan wide, unarmed; unsegmented endopod as long as wide: armed with 5 small setae (1 middle, 1 subdistal, and 3 distal) plusterminal claw, slightly longer than endopod.
Labrum ( Fig. 400I View FIGURE 400 ) extending posteriorly, tapering, as long as wide, with 2 large setules subdistally. Mandible ( Fig. 400J View FIGURE 400 ): coxal gnathobase with pectinate medial margin plus 1 small spinule on distal margin; palp armed with 1 setaon basis, 4 setaeon exopod, and 1 and 4 setae on first and second endopodal segments, respectively; both rami incompletely articulated from basis; all setae naked. Maxillule ( Fig. 401A View FIGURE 401 ) lobate, bearing 7 naked setae (3 mediodistal setae smaller than remaining 4). Maxilla ( Fig. 401B View FIGURE 401 ) lobate, armedwith 7 pinnate setae (4 medial and 3 distal). Maxilliped ( Fig. 401C View FIGURE 401 ) small, 2-segmented, bearing 2 small setae on medial margin of secondsegment.
Legs 1–4 ( Fig. 401 View FIGURE 401 D-G) shortand broad; protopods indistinctly 2-segmented; exopods 2-segmented, obscurely defined from basis; endopod 2-segmented inleg 1, unsegmented in legs 2–4, although retaining vestige of articulation. Basis of leg 1 bearing broad, spiniform inner distal seta. Coxa and basis unarmed in legs 2–4. Setae on rami short, broad, naked, usually blunt tipped. Armature formula for legs 1–4 as follows:
| Coxa | Basis | Exopod | Endopod | |
|---|---|---|---|---|
| Leg 1 | 0-0 | 0-1 | 1-0; 6 | 0-1; 6 |
| Leg 2 | 0-0 | 0-0 | 1-0; 9 | 8 |
| Leg 3 | 0-0 | 0-0 | 1-0; 8 | 9 |
| Leg 4 | 0-0 | 0-0 | 1-0; 9 | 7 |
Leg 5 ( Fig. 400B View FIGURE 400 ) represented by 2 small posteroventral setae at rear of prosome near base of free urosome.
Male. Unknown.
Remarks. In Campodelphys stocki gen. et sp. nov. the endopod is 2-segmented in leg 1, but 1-segmented in legs 2–4. This leg segmentation pattern is unique and serves to differentiate the new species from all of its congeners. The 2-segmented maxilliped bearing two setae on the second segment and the presence of 7 setae on both the maxillule and maxilla also are characteristic features of the new species, as this combination does not occur in any other species.
| MNHNA |
Museum National d'Histoire Naturelle |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.