Lissodelphys guadeloupensis, 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 : 628

Lissodelphys guadeloupensis gen. et sp. nov.

( Fig. 425 )

Typematerial. Holotype (intact ♀, MNHN-IU-2014-21448 ) and dissected paratypes (2 ♀♀, figured) from Lissoclinum fragile (Van Name, 1902) , Fajou Island, Guadeloupe, depth 0-4 m, Monniot coll., 18 December 1980.

Etymology. The name of the new species is based on the type locality, Guadeloupe.

Descriptionoffemale. Body ( Fig. 425A ) vermiform, elongate, cylindrical,and unsegmented,taperinganteriorly and posteriorly. Body length 5.5 mm; greatest body width 0.61 mm. Bodysurface smooth, unornamented, without wrinkles. Urosome not defined ( Fig. 425C ); posterior end of body bilobed with median (anal) incision. Copulatory pore and genital apparatus visible in posterior region of body ( Fig. 425C ).

Rostrum ( Fig. 425B ) distinct, longerthanwide, with rounded distal margin. Antennule ( Fig. 425D ) small, unsegmented, lobate, aslongas wide, with 11 small setae of equal length. Antenna ( Fig. 425E ) 2-segmented, unarmed, consistingof coxobasis and unsegmented endopod; endopod slightly shorter than basis; terminal claw small, aboutone-thirdaslongas endopod.

Labrum not visible. Mandible ( Fig. 425F ) consisting of coxa and biramous palp; coxa with narrow, elongate gnathobase with simple, pectinate (spinulose) medial margin: palp unsegmented; short outer lobe (exopod) with 4 setae; longer inner lobe (basis plus endopod) with 2 traces of articulations onouter sideand armedwith 5 setae, grouped 1, 1, and 3. Maxillule ( Fig. 425G ) incompletely 2-segmented; first segment (precoxa) bearing 2 setae onmedial margin; secondsegment (palp) indistinctly biramous with 3 setae on each ramus, medial seta of inner ramus distinctly shorter than other 5 setae. Maxilla ( Fig. 425H ) unsegmented, tapering, with 5 setae grouped as 2, 2, and 1. Maxilliped ( Fig. 425I ) as small lobe bearing 3 equal setae apically. All setae on mouthparts naked. Legs absent.

Male. Unknown.

Remarks. The incompletely 2-segmented maxillule armed with 8 setae is characteristic for this new species.

Figures

FIGURE 425. Lissodelphys guadeloupensis gen. et sp. nov., female. A, habitus, ventral; B, cephalic region, ventral; C, posterior end of body, ventral; D, antennule; E, antenna; F, mandible; G, maxillule; H, maxilla; I, maxilliped. Scale bars: A, 1 mm; B, 0.05 mm; C, 0.1 mm; D–I, 0.01 mm.