Scaridelphys papillata, 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 : 650

Scaridelphys papillata gen. et sp. nov.

( Fig. 441 )

Typematerial. Holotype (intact ♀, MNHN-IU-2014- 21465 ) and paratype (intact ♀, MNHN-IU-2014-21466) from Didemnum poecilomorpha Monniot F. & Monniot C., 1996 (Type MNHN-IT-2008-3239 = MNHNA 2/ DID.C/230), north of Sulawesi, Indonesia (0l°51.52’N, 125°03.84’E), depth 40 m, 20 May 1993.

Etymology.Thespecificnamealludes tothepapillate ornamentation of the body and lobate antennules.

Descriptionoffemale. Body ( Fig. 441A ) elongate, vermiform, cylindrical, consistingof cephalosome, long metasome and small urosome: body length 7.13 mm. Cephalosome ( Fig. 441B, C ) slightly longerthan wide, 0.87 mm wide, snake-head-shaped, gradually broadening posteriorly, but not articulated from metasome. Metasome 0.76 mm wide; posterior quarter slightly narrower than anteriorthree quarters. Bodysurfaces coveredwith minute papillae, denseondorsal andlateral surfaces, and sparseon ventral surface. Copulatory pore present posteroventrally on metasome ( Fig. 441D ). Free abdomen ( Fig. 441D ) small, unsegmented, bilobed, incompletely articulated from metasome, with deep posteromedian incision, each lobe subcircular, as long as wide; both lobes connected at base. Caudal rami and caudal setae absent.

Rostrum absent.Antennule( Fig.441B, C )represented bylargesphericallobe, coveredwithpapillae,butunarmed. Antenna absent. Labrum ( Fig. 441B ) positioned posterior to antennule, strongly tapering towards blunt apex, surface covered with papillae. One pair of minute lobes ( Fig. 441B, E ), probably vestigial mandibles, positioned lateral to labrum. Other mouthparts absent. Legs absent.

Male. Unknown.

Remarks. This is a relatively large species, with a total body length of 7.13 mm, which is markedly larger than its congener described below.

Figures

FIGURE 441. Scaridelphys papillata gen. et sp. nov., female. A, habitus, dorsal; B, cephalic region, ventral; C, cephalic region, right; D, posterior end of body, ventral; E, oral region. Scale bars: A, 1 mm; B, C, 0.2 mm; D, E, 0.1 mm.