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.