Eunice cedroensis Fauchald 1970

Eunice cedroensis Fauchald, 1970

Eunice cedroensis Fauchald, 1970:29–31, pl. 2: figs. a–e.

MATERIAL EXAMINED.—Holotype, AHF Poly 0336, Baja California, Mexico, 4 miles N of Isla Todos Santos, 31°53′20″N, 116°48′15″W, 75 m, shell, mud, gray sand, 24 Feb 1941, Velero III, sta 1245–41.

DESCRIPTION.—Holotype incomplete with 32 setigers; length 10 mm; maximum width 2 mm at setiger 10. Length through setiger 10, 3 mm. Body cylindrical, becoming slightly ventrally flattened posteriorly. Anterior end abruptly tapered; body tapering slowly posteriorly from about setiger 10.

Prostomium (Figure 30a) about as long and wide as peristomium, as deep as of the peristomium. Prostomial lobes frontally truncate, dorsally slightly inflated; median sulcus shallow. Eyes black, posterior to bases of A-I. Palpal region marked by 2 shallow circular grooves frontally on each prostomial lobe. Antennae in a horseshoe, evenly spaced, similar in thickness. Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles slender and tapering, with maximum 5 long, cylindrical articulations in A-III. A-I to setiger 1; A-II to setiger 7; A-III to setiger 13. Peristomium tapering towards anterior end, longer ventrally than dorsally. Separation between rings distinct on all sides; anterior ring of total peristomial length. Peristomial cirri to middle of prostomium, slender and tapering, without articulations.

Maxillary formula 1+1, 7+8, 9+0, 8+10, and 1+1. Mx VI absent; Mx III long, located behind left Mx II.

Branchiae (Figure 30b) present, pectinate, distinctly longer than notopodial cirri, not reduced in mid-body region, erect. Branchiae from setiger 3 through setiger 27. First 2 and last 3 pairs single filaments; all others with 3 or more filaments; maximum 10 filaments by setiger 10. Branchial stems tapering. Filaments longer than notopodial cirri except in first 2 and last 3 branchiated setigers; filaments digitiform, relatively slender.

Anterior neuropodial acicular lobes obliquely truncate, with aciculae emerging at midline but ventral to high point; acicular lobes becoming symmetrically rounded in first branchial setigers, retaining that shape in rest of body. Anterior and median pre- and postsetal lobes low, transverse folds. Ventral cirri tapering in first 5 setigers. Ventral cirri basally inflated in branchial region, retaining modestly inflated, ovate bases in remainder of specimen; narrow tips tapering. Anterior and median notopodial cirri tapering, with 3 or 4 articulations.

Limbate setae longer than other setae, slender, marginally smooth. Pectinate setae (Figure 30d) small; shafts coarse, cylindrical; blades tapering, flat. One marginal tooth longer and thicker than other teeth; a total of 10 teeth in a seta. Shafts of compound falcigers (Figure 30c) distally inflated, marginally serrated, with distinct distal beak. Appendages long, narrow, tapering; head very small, but distinct, bidentate. Proximal teeth triangular, directed laterally, about twice as large as distal teeth. Distal teeth tapering, erect, slender. Guards symmetrically tapering, with long, narrow mucros. Pseudocompound falcigers and compound spinigers absent. Aciculae single, yellow, tapering to blunt, straight tips; cross-section round. Separation of core and sheath indistinct in both aciculae and subacicular hooks. Subacicular hooks (Figure 30e) yellow, tridentate with teeth in a crest. Hooks first present from setiger 17, present in all setigers thereafter, always single (except for replacements). Hooks slightly tapering. All teeth curved; teeth decreasing evenly in size distally.

UKNOWN MORPHOLOGICAL FEATURES.—All features associated with the posterior setigers.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—None.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 56. Unknown Characters: 1, 2, 37, 38, 47, 50, 57–60, 63.

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