Eunice multipectinata Moore 1911

Eunice multipectinata Moore, 1911

Eunice multipectinata Moore, 1911:248–251, pl. 15: figs. 20–23.

MATERIAL EXAMINED.—Holotype, USNM 16919, Albatross sta 4377, Southern California, 10.2 miles southwest of Point Loma (~32°35′N, 117°25′W), 17 Mar 1904, 232–547 m, green mud and sand, dredge; USNM 16880, Albatross sta 4431, 2 specimens, Southern California, 3.5 to 5.2 miles NE of Brockway Point, Santa Rosa Island (approximately 34°06′N, 120°04′W), 15 Apr 1904, 69–82 m, green and yellow mud, rock and sand, various dredges.

COMMENTS ON MATERIAL EXAMINED.—The holotype was at one time desiccated by exposure to highly concentrated alcohol and is now partially distorted; the two other specimens examined are part of the original material, but were not designated as types by Moore.

DESCRIPTION.—Holotype complete with 196 setigers; total length 172 mm; maximal width 7 mm; length through setiger 10,16 mm. Body cylindrical, tapering slowly posteriorly. Anal cirri as long as last 12 setigers combined.

Prostomium (Figure 76d) distinctly shorter and narrower than peristomium, less than as deep as peristomium. Prostomial lobes frontally rounded, dorsally excavate with a thickened rim; median sulcus shallow, but distinct. Eyes between bases of A-I and A-II, dark. Antennae evenly spaced, similar in thickness. Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles tapering, with cylindrical articulations except drop-shaped distalmost articulations in A-I. A-I to posterior peristomial ring; A-II to setiger 1; A-III incomplete in all specimens, apparently at least as long as A-II. Peristomium cylindrical; front edge of lower lip coarsely scalloped, muscular. Separation between rings distinct dorsally and ventrally; anterior ring about of total peristomial length. Peristomial cirri to front of anterior peristomial ring; in 1 specimen to posterior end of prostomium, slender and digitiform, with 5 to 6 articulations.

Maxillary formula of specimen from USNM 16880 1+1, 8+8, 9+0, 7+11, 1+1, and 1+1. Mx VI small with barely projecting point. Mx III short; part of distal arc with left Mx IV.

Branchiae (Figure 76a,e) present, pectinate, distinctly longer than notopodial cirri, not reduced in mid-body region, erect. Branchiae from setiger 7–8 to setiger 196. Branchiae present to near posterior end, present on more than 65% of total number of setigers. Single filaments in first 8–10 branchiated setigers; up to 12 slender filaments in trim series at setigers 15–20. Branchial stems slender. Filaments shorter than notopodial cirri in all setigers. Branchiae shorter than notopodial cirri except in setigers 15–30.

All neuropodial acicular lobes asymmetrically obliquely rounded; aciculae emerging from upper edge of lobes. All pre- and postsetal lobes low, transverse folds. First 4 ventral cirri thick, digitiform, becoming basally inflated from about setiger 5. Inflated bases distinct, elevated ridges along lower edge of neuropodia; narrow tips tapering. Inflated bases reduced from about setiger 65, remaining visible in all but last 50–60 setigers. Far posterior ventral cirri very long, slender, digitiform, about twice as long as neuropodial acicular lobes. All notopodial cirri slender, tapering, slightly inflated basally. Anterior notopodial cirri with up to 7 indistinct articulations; articulations lost by setiger 15.

Limbate setae marginally serrated. Pectinate setae (Figure 76c,i) tapering, flat or slightly furled. One marginal tooth very much longer than all other teeth; 10–15 teeth present. Shafts of compound falcigers tapering, marginally finely serrated in anterior setigers (Figure 76b), marginally smooth in posterior setigers (Figure 76g). Anterior appendages tapering, bidentate. Proximal teeth larger than distal teeth, curved, laterally directed. Distal teeth distinctly curved. Median and posterior appendages less tapering. Proximal teeth triangular, directed laterally, straight. Distal teeth similar to those in anterior appendages. Guards bluntly to sharply symmetrically pointed, marginally sometimes frayed; mucros absent. Pseudocompound falcigers and compound spinigers absent. Aciculae (Figure 76f)paired in all but few posterior setigers, with dark brown to black cores and clear sheaths, tapering, distinctly bent. Curvature of aciculae at right angles to each other in some parapodia; cross-sections round. Subacicular hooks (Figure 76h) with dark brown to black cores and clear sheaths, bidentate. Hooks first present from setigers 37 and 39 in 2 specimens from USNM 16880 and from setiger 45 in holotype, present in all setigers thereafter, always single (except for replacements). Hooks tapering, bent laterally towards distal; heads distinct. Proximal teeth very much larger than distal teeth, distally curved, laterally directed. Distal teeth nearly erect.

UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—None.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 56, 58, 59. Unknown Characters: 4, 6, 15, 23, 42.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.