Eunice websteri Fauchald 1969

Eunice longicirrata Webster, 1884

Eunice longicirrata Webster, 1884:318–319, pl. 12: figs. 75–80.

Eunice websteri Fauchald, 1969:12–14, fig. 6a–e.

Eunice longicirrata (Kinberg, 1865)

Nicidion longicirrata Kinberg, 1865:564; 1910:43, pl. 16: fig. 20.

Eunice (Nicidion) cariboea.—Hartman, 1948:80 [not Eunice cariboea Grube, 1856].

MATERIAL EXAMINED.—Holotype, RM 415, Honolulu, Hawaii, Eugenie Expedition.

COMMENTS ON MATERIAL EXAMINED.—Kinberg (1865:564) gave locality information as “Mare pacificum juxta urbem Honolulu insulae Oahu, inter corallia, summa aqua.” The type lot includes a very poorly preserved anterior end and a median fragment. The anterior end has been ripped apart and the whole jaw apparatus is missing.

DESCRIPTION.—A-III distinctly longer than A-I and A-II. Separation between peristomial rings distinct dorsally, but probably not laterally; unknown for ventral side. Peristomial cirri to frontal margin of peristomium.

Branchial distribution cannot be determined. Median fragment with long, digitiform single branchial filaments.

Shape of parapodial structures indeterminable. Notopodial cirri short, slender in median fragment.

Limbate setae marginally serrated. Shafts of compound hooks strongly inflated. Appendages short; both teeth directed laterally. Hoods short, symmetrically rounded, marginally serrated. Aciculae brown, distally bent. Subacicular hooks and pectinate setae absent in both fragments.

Eunice websteri Fauchald, 1969

Eunice websteri Fauchald, 1969:12–14, fig. 6.

Eunice longicirrata Webster, 1884:318–319, pl. 12: figs. 75–80.

Leodice margaritacea Verrill, 1900:644–645.

Leodice longicirrata.—Treadwell, 1921:11–14, figs. 3–12, pl. 1: figs. 1–4 [not Eunice longicirrata Kinberg, 1865].

Eunice longicirrata.—Hartman, 1942:9 [not Eunice longicirrata Kinberg, 1865].

MATERIAL EXAMINED.—Holotype, 1 specimen and 8 mounted slides, USNM 4792, Bermuda, coll. G. Brown Goode.

DESCRIPTION.—Holotype complete with 150 setigers; total length 120 mm; maximal width 4 mm at setiger 10; length through setiger 10, 8 mm. Body slightly dorsoventrally flattened, but basically convex dorsally and more flattened ventrally. Anal cirri as long as last 15 setigers, slender, with 15 cylindrical articulations.

Prostomium (Figure 116e) distinctly shorter and narrower than peristomium, as deep as of peristomium. Prostomial lobes frontally truncate, dorsally flattened; median sulcus very shallow. Eyes lateral to bases of A-II, dark. Antennae in a horseshoe, evenly spaced, similar in thickness. Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles slender and digitiform, with mostly long, cylindrical articulations. Distal articulations in A-I short, very well set off from each other and nearly moniliform; maximum number of articulations 8 in A-III.A-I to posterior peristomial ring; A-II to setiger 6; A-III to setiger 8. Peristomium cylindrical. Separation between rings distinct dorsally and ventrally; anterior ring of total peristomial length. Peristomial cirri to middle of prostomium, very slender, with 6 long, cylindrical articulations.

Jaws not examined.

Branchiae (Figure 116h) present, pectinate, distinctly longer than notopodial cirri, not reduced in mid-body region, erect. Branchiae from setiger 3 to setiger 53. Branchiae terminating well before posterior end, present on less than 55% of total number of setigers. First and last 10 pairs single filaments; maximum 15 filaments. Branchial stems slender, tapering. Filaments slender, longer than notopodial cirri in median branchial setigers Anterior neuropodial acicular lobes broadly and nearly symmetrically rounded, becoming conical in posterior setigers (Figure 116i); aciculae emerging at midline. All presetal lobes low, transverse folds. Anterior postsetal lobes low, rounded, free folds, becoming low, transverse folds by end of branchial region. Postsetal lobes shorter than acicular lobes in all setigers. First 6 ventral cirri thick, nearly triangular and tapering. Ventral cirri basally inflated from about setiger 7 through about setiger 55. Inflated bases modest, ovate inflated; narrow tips digitiform. Postbranchial ventral cirri digitiform. All notopodial cirri with 2 or more long, cylindrical articulations. Anterior notopodial cirri tapering, long and distally truncate; median and posterior notopodial cirri digitiform.

All limbate setae slender and marginally smooth. Pectinate setae (Figure 116f, j) narrow, tapering, flat. One marginal tooth longer than other teeth; 10 teeth present. Shafts of compound falcigers (Figure 116 g,k) tapering and internally striated, but without marginal teeth. Appendages short, tapering with distinct heads, bidentate. Proximal teeth triangular, directed laterally or slightly basally. Distal teeth obliquely curved. Guards distally round, marginally smooth; mucros absent. Pseudocompound falcigers and compound spinigers absent. Two or 3 aciculae in a parapodium, yellow. Anterior aciculae bluntly tapering or nearly truncate; median aciculae distally expanded to distinct rounded tabs; posterior aciculae becoming slender, tapering to fine tips, sometimes distinctly bent dorsally; cross-sections round. Separation between core and sheath indistinct in both aciculae and subacicular hooks. Subacicular hooks (Figure 1161) yellow, bidentate. Hooks first present from setiger 31, present in all setigers thereafter, paired in most setigers. Hooks tapering, with large, laterally directed proximal teeth. Distal teeth smaller than proximal teeth, nearly erect.

UNKNOWN MORPHOLOGICAL FEATURES.—Jaw structure.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—None.

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

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.

Eunice websteri

Eunice longicirrata Webster, 1884, pp. 318–319, pl. 12: figs. 74–80.

?Leodice longicirrata.—Treadwell, 1921, pp. 11–14, figs. 3–12, pl. 1: figs. 1–4.

MATERIAL.—Bermuda, collection of G. Brown Goode, 1876–77, holotype (USNM 4792).

DESCRIPTION.—The holotype is a complete specimen with about 150 setigers; it is about 120 mm long and 4 mm wide with setae. The parapodia of setigers 1–9 and 21–32 on the left side have been removed and are mounted on slides; parapodia from the postbranchial region and the whole posterior end also have been mounted on slides. The measurements given above are estimates of the length and width of the complete specimen. The specimen had been dissected for the pharyngeal apparatus and the illustration of the anterior end is partially reconstructed.

The prostomium (Figure 6c) is wider than long with a short, narrow anterior incision; both halves are anteriorly truncate and the lateral margins are nearly straight. The occipital tentacles are inserted in a crescent; all are about equidistant from each other. A pair of black eyes is present posterior to the outer lateral tentacles. The outer lateral occipital tentacles reach the second peristomial segment; each has five or six articulations. The inner lateral tentacles reach setiger 5; each has six or seven articulations. The median tentacle reaches setigers 8 or 9 and has eight articulations. All articles are cylindrical.

The cylindrical first peristomial segment is as long as the prostomium. The second peristomial segment is only one third as long as the first one, but of the same length as the first setiger. The long peristomial cirri are slender; they reach the middle of the prostomium; each has six or seven articulations.

The presetal lobes in the first parapodia (Figure 6e) are obliquely truncate; the setal lobes are triangular and the postsetal lobes are low, transverse folds. The branchial parapodia (Figure 6d) are similar to the

first ones; the setal lobes become more truncate; but this may be an artifact since the tissue has receded from the acicula which are left bare over a long distance. The dorsal cirri are similar in length and shape in all parapodia, but are most conspicuous in the prebranchial and postbranchial regions. Each of the dorsal cirri in the prebranchial region has seven or eight cylindrical articles; those in the branchial region have one or two articles each. The postbranchial dorsal cirri have four or five articles each. The ventral cirri in the prebranchial and anterior branchial setigers are thick and digitiform; ventral cirri in the posterior branchial and postbranchial regions have distinct basal swellings.

Branchiae (Figure 6d) are present on setigers 3–53. The first and the last ten branchiae are single filaments; all others are pectinate. The branchiae are fully developed on setigers 5–33; the maximal number of branchial filaments is fifteen.

Long, slender capillary setae are present in dorsal fascicles, and composite, hooded, bidentate hooks in ventral fascicles in all parapodia. Each hooded hook (Figure 6a) has a strongly curved distal tooth and a sharply pointed proximal tooth at right angles to the axis of the appendage; both teeth are similar in size. The hoods are blunt and serrations are absent. Pectinate setae were not seen. Acicula number three or four in a parapodium; each is light yellow and is expanded distally to form a bluntly conical tip. Subacicular hooks (Figure 5c) are present from setiger 31; they occur singly in most parapodia, but two hooks are sometimes present. Each is light yellow and has a short distal tooth and a much larger proximal tooth at right angles to the axis of the hook.

The pharyngeal apparatus is in position in the specimen, but the dissection has cut through parts of it so the number of teeth cannot be counted; the jaws appear to be of the usual kind.

Western Atlantic: North Carolina to the Gulf of Mexico