Kudenovythoe corbariae Salazar-Vallejo and Jimi, 2025

Kudenovythoe corbariae Salazar-Vallejo and Jimi sp. n.

( Figure 16 View Figure 16 )

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Type material. Papua New Guinea, Bismarck Sea. Holotype ( MNHN IA 2000-2119 About MNHN ), and paratype

IA 2000-2120), West of Kairiru Island , RV Alis, Sta . CP4048 ( 03.34°S, 143.46°E), 325–345 m, 19 December ( paratype complete, bent ventrally, body trapezoidal, dorsal surface half as large as ventral one; anterior markedly contracted, right lateral antenna and palp lost, left antenna slightly larger and wider than median antenna lost; caruncle compressed, reaching chaetiger 4; eyes not seen; branchiae from continued to chaetiger 65; chaetal bundles of anterior and posterior chaetigers removed for

(kept in container); body 53 mm long, 6 mm wide, 89 chaetigers.

Additional material. Papua New Guinea, Bismarck Sea. Two fragments ( ECOSUR), West of Kairiru RV Alis, Sta . CP4048 ( 03.34S, 143.46°E), 325–345 m, 19 December 2012 (anterior and posterior probably from the same specimen; anterior fragment markedly bent ventrally, pharynx exposed by of dorsal body wall; median antenna ¼ as long as caruncle; caruncle distorted, reaching chaetiger lateral antenna on site, slightly larger than palps; eyes not seen; branchiae from chaetiger 3 to fragment; left parapodium of chaetiger 31 removed for observation (kept in container); notochaetae long capillaries and shorter harpoon notochaetae, and blunt aciculars; neurochaetae include capillaries smooth spurred chaetae: 34 mm long, 6 mm wide, 49 chaetigers. Posterior fragment sinuous, broken initially, posteriorly complete; dorsal width about half as long as ventral width; last 34 without branchiae; anus terminal, no anal cirri; 35 mm long, 6.5 mm wide, about 60 chaetigers).

Diagnosis

Kudenovythoe with ventral cirri of similar length along anterior region; spurred neurochaetae smooth

Description

Holotype (MNHN IA 2017–3732) complete, brown, integument iridescent ( Figure 16 View Figure 16 (A)), wider tapered along median and posterior regions; notopodia displaced dorsally (venter 2 times as dorsum); left parapodia of chaetigers 25 and 47 removed for observation (kept in container); body long, 5.5 mm wide, 79 chaetigers (last 22 without branchiae).

Prostomium pale, anterior lobe with lateral antennae and palps, smooth, antennae slightly larger palps; posterior lobe slightly shorter than anterior one, with median antenna resembling lateral ones towards posterior margin, about as long as both prostomial lobes, half as long as caruncle (Figure

Caruncle tapered posteriorly, irregularly contracted, mostly detached from body wall, reaching third of chaetiger 5, median ridge smooth, lateral lobes thin, barely projected laterally.

First chaetiger with dorsal cirri about twice longer than ventral ones. Second chaetiger with dorsal longer than ventral ones, ventral cirri of similar size as following ones. Pharynx not exposed.

Parapodia biramous; notopodia and neuropodia truncate conical ( Figure 14 View Figure 14 (C)); notopodia smaller neuropodia. Dorsal cirri usually longer than branchiae. Branchiae pectinate, present from chaetiger about eight filaments, larger with more filaments along chaetigers 8–22, progressively smaller, chaetiger 57. Ventral cirrus fusiform, smaller than dorsal cirrus.

Notochaetae mostly smooth capillaries, a few finely denticulate capillaries, and harpoon chaetae small denticles ( Figure 16 View Figure 16 (C), inset). Neurochaetae include smooth capillaries and spurred chaetae longer tine smooth along inner margin ( Figure 16 View Figure 16 (D)), aciculars; without denticulate aciculars or Posterior chaetigers with mostly smooth capillaries, spurred neurochaetae with longer tine lobate, non-denticulate ( Figure 16 View Figure 16 (E)).

Posterior region tapered ( Figure 14 View Figure 14 (F)); pygidium with anus terminal, anal cirri not seen.

Etymology

The species name is derived from Dr Laure Corbari, Head of Marine Invertebrate collections in the National d’Histoire Naturelle, Paris, and leader of several expeditions, in recognition of her achievements to acknowledge her generous support for our research activities.

Variation

The trapezoidal body shape is present in all specimens. Notochaetae include only smooth and denticulate capillaries, whereas neurochaetae were only smooth capillaries and smooth to lobate chaetae. The abranchiate posterior region extends along 22–34 segments in complete specimens.

Remarks

Kudenovythoe corbariae sp. n. resembles an undescribed species from Indonesia, as indicated in above, in having ventral cirri of chaetiger 2 as long as following ones. However, K. corbariae differs undescribed species by having dorsal cirri slightly longer than branchiae, and neurochaetae smooth lobate, whereas the undescribed species has dorsal cirri markedly longer than branchiae, and denticulate.

JOURNAL OF NATURAL HISTORY