Doropygella corsensis, 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 : 310

publication ID

https://doi.org/ 10.11646/megataxa.4.1.1

DOI

https://doi.org/10.5281/zenodo.6421615

persistent identifier

https://treatment.plazi.org/id/03C487CB-EE64-3B0D-FF4D-FC57FEE4FDDA

treatment provided by

Plazi

scientific name

Doropygella corsensis
status

sp. nov.

Doropygella corsensis n. sp.

( Figs. 207 View FIGURE 207 , 208 View FIGURE 208 )

Type material. Holotype ♀ (dissected and mounted on a slide, MNHN-IU-2014-21305 ) from Phallusia fumigata (Grube, 1864) (MNHN-IT-2008-6126 = MNHN P5/ PHA/49), Solenzara, Corsica, France, Monniot coll., 1982.

Etymology. The new species is named after Corse, the French name for Corsica, the type locality.

Descriptionoffemale. Body ( Fig. 207A View FIGURE 207 ) slightly dorsoventrally depressed, 2.68 mm long. Prosome consisting of cephalosome and obscurely segmented metasome, with pedigerous somites defined only by weak dorsal and lateral constrictions. Second and third pedigerous somites with weakly defined epimera; fourth pedigerous somite forming strongly inflated, bulbous brood pouch, slightlylonger than wide and slightly longer than anterior part of prosome. Free urosome ( Fig. 207B View FIGURE 207 ) distinctly 5-segmented; genital somite much wider than long, 85×273 μm; 4 abdominalsomites 173×227, 167×200, 94×170, and 100×215 μm, respectively. Caudal ramus ( Fig. 207C View FIGURE 207 ) slender, about 5.3 timeslongerthan wide (190×36 μm) and 1.9 times longer than anal somite: armed with 2 small setae and 4 small, distal spines; 2 setae located at 22 and 62% of ramus length; 4 distal spines claw-like, at most 12 μm long, less than distal width of ramus.

  Coxa Basis Exopod Endopod
Leg 1 0-0 1-I I-1; I-1; III, I, 4 0-1; 0-1; 1, 2, 3
Leg 2 0-0 1-0 I-1; I-1; III, I, 5 0-1; 0-2; 1, 2, 3
Leg 3 0-0 1-0 I-0; I-1; II, I, 5 0-1; 0-2; 1, 2, 3
Leg 4 0-0 1-0 I-0; I-1; II, I, 5 0-1; 0-2; 1, 2, 2

Rostrum ( Fig. 207D View FIGURE 207 ) as long as wide, tapering from broad base towards rounded apex. Antennule ( Fig. 207E View FIGURE 207 ) slender, 198 μm long, 9-segmented; first and second segments broadened; armatureformula 3, 15+2 spines, 6, 4+aesthetasc, 2, 4, 3+aesthetasc, 2, 9+aesthetasc; 2 large setae on first segment pinnate, all other setae naked. Antenna ( Fig. 207F View FIGURE 207 ) slender, 4-segmented; coxa unarmed; basisalso unarmed, 2.7 timeslongerthan wide; first endopodal segment with 1 seta subdistally, twice as long as wide; compound distal endopodal segment about 4.6 timeslongerthan wide (100×22 μm) and 1.7 times longer than first endopodal segment, slightly expanded distally; armedwith 7 smallsetae (all attenuated) plus small terminal claw, about one-third as long as segment.

Labrum ( Fig. 207G View FIGURE 207 ) with trilobate, setulose posteriormargin. Mandible ( Fig. 207H View FIGURE 207 ) with 4 teeth on coxal gnathobase; basis with 1 medial seta; exopod with 5 subequal setae; endopodwith 4 and 10 setaeon firstandsecondsegments, respectively; secondsegment ornamented with thick setules along outer margin. Maxillule ( Fig. 207I View FIGURE 207 ) with 9 setae on arthrite, 1 on coxal endite, 2 on epipodite, 4 on basis (second proximal seta short and thin), 4 on exopod, and 5 and 2 on first and secondendopodal segments, respectively; secondsegment much smaller than first. Maxilla ( Fig. 208A View FIGURE 208 ) 5-segmented; syncoxa with 3, 1, 2, and 3 setae on first to fourth endites, respectively; basis with strong claw (spinulose along distal half of concave margin) plus 2 setae; endopod with 1, 1, and 4 setae on first to third segments, respectively. Maxilliped ( Fig. 208B View FIGURE 208 ) incompletely 2-segmentedwith 8 setae (4 proximal and 4 distal) on first segment and 2 apical setae on second.

Legs 1–4 with 3-segmented rami ( Fig. 208 View FIGURE 208 C-F). Inner coxal seta absent in legs 1–4. Inner distal spine on basis of leg 1 setiform, spinulose, 68 μm long, extending to distal border of second endopodal segment. First exopodal segment of legs 3 and 4 lacking inner seta. Inner setae on endopod of leg 4 rudimentary. Armature formula for legs 1–4 as follows:

Leg 5 ( Fig. 208G View FIGURE 208 ) 2-segmented; protopod with 2 rows of spinules on distal border and armed with pinnate outer distal seta; free exopodal segment about 2.4 times longerthanwide (83×35 μm), taperingdistally, densely spinulose and armed with naked apical seta and small subdistal spine.

Male. Unknown.

Remarks. Doropygella corsensis sp. nov. and D. normani have several unusual features in common including the presence of distal spines on the caudal ramus, 2 spines on the second segment of the antennule, and an ornamentation of setules along the outer margin of the second endopodal segment of the mandible. Brady (1878) illustrated these features for D. normani . These detailed similarities suggest that the two species might be considered as conspecific, but there are some significant differences. In D. normani the maxilliped is unsegmented and distally truncate (vs. incompletely 2-segmented, with a narrow secondsegment in D. corsensis sp. nov.), and according to Brady the outer spines of legs 3 and 4 are replaced by long setae (vs. the exopods of legs 3 and 4 bear outer spines in D. corsensis sp. nov.). In addition, leg 2 of D. normani also differs from that of D. corsensis sp. nov., although Brady’s illustration for leg 2 was shown as having an inner coxal seta and large, pinnate outer setae on the exopod, which is so unusual that it requires confirmation.

Kingdom

Animalia

Phylum

Arthropoda

SubPhylum

Tunicata

Class

Maxillopoda

Order

Cyclopoida

Family

Notodelphyidae

Genus

Doropygella

GBIF Dataset (for parent article) Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF