Eunice ehlersi Gravier 1900

Eunice ehlersi Gravier, 1900

Eunice ehlersi Gravier, 1900:248–251, figs. 110–113, pl. 13: figs. 75, 76.

MATERIAL EXAMINED.—Holotype, MNHN, Paris, Djibouti, 1897, coll. Coutière, no. 29.

DESCRIPTION.—Holotype incomplete, of unknown sex, with 53 setigers; length 25 mm; maximal width 4 mm at setiger 10; length through setiger 10, 6 mm. Body cylindrical.

Prostomium (Figure 40a) distinctly shorter and narrower than peristomium, less than as deep as peristomium. Prostomial lobes frontally obliquely truncate, dorsally flattened; median sulcus deep. Eyes present posterior to A-I, dark. Antennae in shallow horseshoe, evenly spaced, similar in thickness. Ceratophores ring-shaped, without articulations. Ceratostyles digitiform, with up to 8 short, cylindrical articulations in A-III. A-I to posterior peristomial ring; A-II and A-III to setiger 3. Peristomium flaring slightly ventrally. Separation between rings distinct on all sides; anterior ring of total peristomial length on dorsal side and ∼ on ventral side. Peristomial cirri to front edge of peristomium, digitiform, without articulations.

Maxillary formula 1+1, 5+6, 8+0, 3+9, and 1+1. Distal tooth on right Mx II very small. Mx III long, located in part behind Mx II, however forming are with very short left Mx IV. Mx VI absent.

Branchiae (Figure 40e) present, pectinate, distinctly longer than notopodial cirri, flexible. Branchiae from setiger 14 to end of fragment. First branchiae single filaments, maximum 6 filaments. Branchial stems very slender, pliable, longer than notopodial cirri. Filaments slender, longer than notopodial cirri.

Neuropodial acicular lobes symmetrically rounded; aciculae emerging at midline. Pre- and postsetal lobes low, transverse folds. First 4 ventral cirri thick, tapering. Median ventral cirri with inflated bases forming elongated ventral ridges along lower edge of neuropodia; narrow tips short and button-shaped. Posteriormost ventral cirri distinctly tapering inflated base reduced, but still visible as a ridge. Anterior notopodial cirri basally inflated, becoming tapering in branchial region; articulations absent.

Limbate setae slender, marginally smooth. Pectinate setae (Figure 40b) with narrow, cylindrical shafts. Blades slightly furled, flaring. One marginal tooth distinctly longer than other teeth, with ∼12 teeth. Shafts of compound falcigers (Figure 40d) thick, slightly inflated, marginally smooth; beaks indistinct. Appendages short, tapering, with very large heads, bidentate. Proximal and distal teeth similar in size. Proximal teeth tapering, directed obliquely distally. Distal teeth tapering, nearly erect. Guards distally symmetrically bluntly pointed, nearly rounded, marginally serrated; mucros absent. Pseudocompound falcigers and compound spinigers absent. Aciculae single, anteriorly pale honey-colored, becoming brown to dark brown, sharply and symmetrically pointed, straight; cross-section round. Notopodial aciculae honey-colored. Separation between core and sheath distinct in both aciculae and subacicular hooks. Subacicular hooks (Figure 40c) bidentate. Hooks first present from setiger 27. Proximal teeth larger than distal teeth, directed laterally, upturned distally. Distal teeth narrowly triangular, erect. Guards distally rounded.

UNKNOWN MORPHOLOGICAL FEATURES.—Parapodial and branchial features associated with far posterior setigers; pygidium and anal cirri.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—None.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 56. Unknown Characters: 1, 2, 36–38, 40, 42, 57–60, 81, 82.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—33,2; 37,1; 38,1.