dcsimg

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Eunice marovoi Gibbs, 1971

Eunice marovoi Gibbs, 1971:158–160, figs. 10a-h.

MATERIAL EXAMINED.—Holotype, BM(NH) ZB 1970.42, Solomon Islands, sta ML 96, Marovo Lagoon, Vangunu Island, dredged, 9 m, sand, 28 Oct 1965, coll. Royal Society Expedition to Solomon Islands. Nine paratypes, BM(NH) ZB 1970.46, Solomon Islands, sta ML 110, Koto Lagoon, Vangunu Island, 26 m, mud, 28 Oct 1965, coll. Royal Society Expedition to Solomon Islands. One paratype, BM(NH) ZB 1970.49, Solomon Islands, sta ML 218, Tokavai Lagoon, New Georgia, dredged, 18 m, mud, 8 Nov 1965, coll. Royal Society Expedition to Solomon Islands.

COMMENTS ON MATERIAL EXAMINED.—The description is based on the holotype and a single paratype from ZB 1970.46. The variability is indicated in Table 7.

DESCRIPTION.—Holotype complete with 65 setigers; total length 14.5 mm; maximal width 1 mm wide; length through setiger 10, 2.5 mm.

Prostomium (Figure 70a) distinctly shorter and narrower than peristomium, as deep as of peristomium. Prostomial lobes frontally rounded, dorsally slightly inflated; median sulcus represented by very shallow frontal notch; ventral side deeply furrowed. Eyes between bases of A-I and A-II, black; posterior of eyes overlapped by peristomial fold. Antennae in a horseshoe, evenly spaced, similar in thickness. Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles slender and tapering, without articulations. A-I to setiger 1; A-II to setiger 2; A-III to setiger 3. Peristomium cylindrical. Separation between peristomial rings distinct on all sides of body; anterior ring about twice as long as posterior ring. Peristomial cirri about as long as A-I, to middle of peristomium, digitiform, without articulations.

Maxillary formula 1+1, 4–6+10–13, 10–13+0, 10–13+10-13, according to Gibbs. Left Mx II with large fang; such fang absent on right side.

Branchiae (Figure 70f) present, pectinate, distinctly longer than notopodial cirri, not reduced in mid-body region, erect. Branchiae from setiger 3 to setiger 17–22. Branchiae terminating well before posterior end, present on less than 55% of total number of setigers. First branchia with 2 or more usually 3 filaments, maximum 6 filaments. Only last branchia single filaments.

Neuropodial acicular lobes distally obliquely rounded with high side superiorly; aciculae emerging above midline. All pre- and postsetal lobes low, transverse folds. First 2 ventral cirri bluntly tapering. Bases of ventral cirri inflated from beginning of branchial region. Inflated bases about of cirral length, ovate; narrow tips digitiform. Basal inflation less distinct in postbranchial region, but even in last setigers present, glandular bases of ventral cirri slightly thicker than the remainder of the cirri, distinctly set off from tips. Prebranchial notopodial cirri increasing in length, tapering. Notopodial cirri of branchial region long, tapering, with embedded aciculae basally. Postbranchial notopodial cirri decreasing in length, becoming slender and digitiform in posterior setigers. Notopodial cirri located on dorsal body wall well above bases of acicular lobes in posterior setigers. Notopodial cirri without articulations.

Limbate setae slender, marginally smooth. Pectinate setae not seen. Compound falcigers (Figure 70d,e) slender. Shafts distinctly inflated, marginally serrated. Appendages narrow, tapering to tips, bidentate. Proximal teeth triangular, directed laterally. Distal teeth very nearly erect. Guards tapering to distinct, slender mucros. Guards of posterior hooks (Figure 70d) distally rounded with very small, narrow mucros. Pseudocompound falcigers and compound spinigers absent Aciculae yellow; anterior aciculae tapering to sharp tips; postbranchial aciculae distally blunt and slightly bent dorsally; cross-sections round. Separation between core and sheath indistinct in both aciculae and subacicular hooks. Subacicular hooks (Figure 70c) yellow, tridentate with teeth in a crest. Hooks first present from setiger 17–19, present in all setigers thereafter; 3 hooks present in most setigers. Hooks strongly curved with large heads. Main fangs large; secondary fangs much smaller; tertiary fangs very small and appended to back of secondary fangs.

UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium and anal cirri.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—None.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 22, 56, 60. Unknown Characters: 4, 6,42, 65–68.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.
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bibliographic citation
Fauchald, Kristian. 1992. "A Review of the Genus Eunice (Polychaeta: Eunicidae) Based upon Type Material." Smithsonian Contributions to Zoology. 1-422. https://doi.org/10.5479/si.00810282.523