Doropyguselongatus, 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 : 347-350

publication ID	https://doi.org/ 10.11646/megataxa.4.1.1
DOI	https://doi.org/10.5281/zenodo.5699857
persistent identifier	https://treatment.plazi.org/id/03C487CB-EE0B-3B68-FCEF-F98CFB43FE52
treatment provided by	Plazi
scientific name	Doropyguselongatus
status	sp. nov.

Treatment

Doropyguselongatus sp. nov.

( Figs. 230 View FIGURE 230 , 231 View FIGURE 231 )

Typematerial. Holotype (intact ♀, MNHN-IU-2017- 2171 ) , paratypes (2 intact ♀♀, MNHN-IU-2014-21317), and dissectedparatype (♀, figured) from Pyura ocellata Monniot F., 2016 , N/O “Hermano Gines”, Stn CP 4386, French Guiana (05°38.4 Ń, 52°29.2 Ẃ), depth 46-47 m, MNHN - convention APA-973-1 coll., 05 August 2014.

Etymology. The specific name of the new species refers to the elongate prosome of the female.

Descriptionoffemale. Body ( Fig. 230A View FIGURE 230 ) slightly bilaterally compressed, 2.64 mm long. Prosome elongate, curved ventrally; somites defined only by weak surface constrictions. Dorsalcephalic shield obscurely defined from first pedigerous somite. Brood pouch formed by fusion of third and fourth pedigerous somites, elongate, slightly curved ventrally and more than twice as long as wide in lateral view, with nearly parallel dorsal and ventral margins and almost truncate apex. Free urosome ( Fig. 230B View FIGURE 230 ) slender, indistinctly 5-segmented, gradually narrowing posteriorly; genital and 4 weakly defined abdominalsomites 140×215, 152×173, 133×140, 72×118, and 88×115 μm, respectively. Caudalramus ( Fig. 230C View FIGURE 230 ) about 2.9 times longer than wide (121×42 μm) and about 1.4 times longer than anal somite, narrowing distally: armed with 6 thin setae; 2 proximal setae positioned at 30 and 46% of ramus length; all setae naked and shorter than width of ramus at base.

Rostrum ( Fig. 230D View FIGURE 230 ) weak, tapering, aslongas wide. Antennule ( Fig. 230E View FIGURE 230 ) 250 μmlong, 9-segmented; first and second segments much broader than distal segments; armatureformula 3, 16+spine, 6, 4+aesthetasc, 4, 2+aesthetasc, 3, 2+aesthetasc, and 7+aesthetasc; setae generally long; 2 pinnate setae on each of first, second and fourth segments, and 1 on each of third, fifth and sixth segments; all other setae naked. Antenna ( Fig. 230F View FIGURE 230 ) slender, 4-segmented; coxashortand unarmed; basiswith 3 small setae, 2 on tip of outer distal knob (representing exopod) and 1 on distal border; first endopodal segment unarmed; compound distal endopodal segment elongate, about 6.2 times longer than wide (130×21 μm); armed with 9 small setae plus small terminal claw, about onethirdaslongas segment.

Labrum ( Fig. 230G View FIGURE 230 ) setulose oneitherside of smooth, semicircular posteromedian lobe. Mandible ( Fig. 230H View FIGURE 230 ) with 5 sharpteeth oncoxal gnathobase; basis with 1 setaon medial margin; exopod unsegmented with 5 equal setae; endopod 2-segmented, incompletely articulated from basis, with 4 and 9 setae on first and second segments, respectively; both endopodal segments ornamented with patch of minute spinules at outer distal corner. Paragnath ( Fig. 230I View FIGURE 230 ) as small lobe with setulose medial surface and sclerotized semicircular lobule subdistally on outer margin. Maxillule ( Fig. 230J View FIGURE 230 ), maxilla ( Fig. 230K View FIGURE 230 ) and maxilliped ( Fig. 231A View FIGURE 231 ) asin D. martiniquensis sp. nov.

Leg 1 ( Fig. 231B View FIGURE 231 ) biramous, with 3-segmented rami. Outer seta on basis broad proximally and flagellate distally. Inner distal spine on basis 53 μm long, extending to middle of second endopodal segment. Legs 2–4 ( Fig. 231 View FIGURE 231 C-E) with 3-segmented exopods and 2-segmented endopods: exopod as long as endopod in legs 2 and 3, but longer than endopod in leg 4. Inner coxal seta about 1.4 times as long as endopod, extending beyond distal tip of endopod in legs 2 and 3; as long as endopod, but not extending beyond tip of endopod inleg 4. Outer seta on basis small. Inner setae on endopod shorter than in D. martiniquensis sp. nov. Armature formula for legs 1–4 as in D. martiniquensis sp. nov.

Leg 5 ( Fig. 231F View FIGURE 231 ) 2-segmented: protopod similarto that of D. martiniquensis sp. nov.; free exopodal segment 4.2 times longer than wide (112×27 μm), armed and ornamented as in D. martiniquensis sp. nov., but slightly constricted in proximal quarter.

Male. Unknown.

Remarks. See the remarks section for the following species summarised in Table 8 View TABLE 8 .