Nicidion cincta Kinberg 1865

Eunice cincta (Kinberg, 1865)

Nicidion cincta Kinberg, 1865:564; 1910:43, pl. 16: fig. 21.

Eunice (Nicidion) cincta.— Hartman, 1948:80–81.

MATERIAL EXAMINED.—Holotype, RM 418, Eimeo, Society Islands, 0.3–1 m, Eugenie Expedition 1159. Kinberg (1865:564) gave the locality information as “Mare pacificum inter corallia mortua taeniarum exteriorum insulae Eimeo, summa aqua vel fundo 1–4 pedum.”

COMMENTS ON MATERIAL EXAMINED.—The anterior end has been deeply dissected and the shape of the prostomium cannot be determined accurately. The last 15 setigers are extremely poorly preserved.

DESCRIPTION.—Holotype incomplete with 65 setigers (last 15 extremely poorly preserved); length through setiger 50 15 mm; maximal width 1.1 mm; length through setiger 10, 3 mm.

Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles thick and digitiform, wrinkled, but without articulations. All antennae to posterior peristomial ring. Separation between peristomial rings distinct on all sides; anterior ring ∼ of total peristomial length. Peristomial cirri to posterior part of anterior peristomial ring, ovate, without articulations.

Jaws missing.

Branchiae absent.

Neuropodial acicular lobes rounded; aciculae emerging at midline. Presetal lobes low, transverse folds. Anterior postsetal lobes following outline of acicular lobes closely, becoming low, transverse folds from about setiger 25. Anterior and median ventral cirri thick, tapering. Anterior notopodial cirri medially inflated, becoming digitiform in last distinct segments in fragment, without articulations.

Limbate setae slender, marginally serrated. Shafts of pectinate setae (Figure 30f) very slender. Pectinate setae flaring, flat. Both marginal teeth slightly longer than other teeth; ∼15 teeth present. Shafts of compound falcigers (Figure 30g) distinctly inflated, marginally coarsely serrated. Appendages slender with nearly parallel sides, bidentate. Proximal teeth shorter than distal teeth, sharply pointed, directed basally. Distal teeth slender, directed laterally. Guards asymmetrically bluntly pointed, marginally serrated, without mucros. Pseudocompound falcigers and compound spinigers absent. Aciculae brown, bluntly conical, straight; cross-section round. Subacicular hooks (Figure 30h) brown, bidentate. Hooks first present from setiger 21, present in all setigers thereafter, single at least through median setigers. Hooks with distinctly bent necks. Proximal teeth slightly larger than distal teeth, directed laterally. Distal teeth curved, directed laterally.

UNKNOWN MORPHOLOGICAL FEATURES.—Features associated with the posterior setigers and with the poor state of preservation.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—None.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 22, 31–42, 54, 55. Unknown Characters: 1, 2, 4, 6–17, 24, 47, 50, 51, 57–60, 63, 74, 78.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.