Eunice contingens (Chamberlin 1919)

Eunice contingens (Chamberlin, 1919)

Leodice contingens Chamberlin, 1919a:260–263, pl. 57: figs. 1–5.

MATERIAL EXAMINED.—Holotype, USNM 19394, Albatross, sta 3642, Galapagos Islands, near Hood Island, Ripple Point, 1°30′5″S, 89°35′W, 549 m, 7 Nov 1904, broken shells and Globigerina.

COMMENTS ON MATERIAL EXAMINED.—The type is a complete mature female with large eggs in the body cavity. It has been dried out and no meaningful measurements can be made. It appears to agree with Chamberlin's description.

DESCRIPTION.—Anterior end described, but not illustrated by Chamberlin. Ceratophores ring-shaped in all antennae. Ceratostyles without articulations, or vaguely wrinkled. A-I to setiger 1; A-II to setiger 4; A-III to setiger 6. Peristomium cylindrical; separation between rings distinct at least ventrally. Peristomial cirri long and slender, reaching well beyond frontal margin of peristomium, without articulations. Maxillary formula according to Chamberlin (1919a:263; see also pl. 57: fig. 1) 1+1, 6+7, 7+0, 4+9, 1+1.

Branchiae (Figure 35k–1) present, pectinate, shorter than notopodial cirri, not reduced in mid-body region, erect. Branchiae from setiger 6 to end of specimen. Branchiae present to near posterior end, present on more than 65% of total number of setigers. First branchia single filaments; all others, execpt possibly far posterior ones, pectinate; 18–19 filaments present at or near setiger 15.

Neuropodial acicular lobes (Figure 35j–1) distally rounded or truncate; aciculae emerging at midline. All pre- and postsetal lobes low folds. Anterior ventral cirri tapering from wide, triangular bases. Median ventral cirri basally inflated; inflated bases transverse welts; narrow tips digitiform. Posterior ventral cirri digitiform, without basal inflations. Anterior notopodial cirri long and slender, basally somewhat inflated; median notopodial cirri somewhat shorter; the basal inflated region more distinct. Far posterior notopodial cirri slender and shorter than in anterior end. Notopodial cirri without articulations

Anterior pectinate setae (Figure 35m) furled, tapering, with 1 marginal tooth longer than other teeth; ∼10 teeth present. Median and posterior pectinate setae (Figure 35o,p) flaring, furled; ∼15 teeth present. Shafts of compound falcigers (Figure 35n,r) distinctly to slightly flaring; anterior shafts slightly serrated; beaks present. Appendages short with both teeth well developed and directed laterally, bidentate. Proximal teeth tapering, tilted distally. Guards asymmetrically bluntly pointed in anterior setigers, symmetrically bluntly pointed in posterior setigers; mucros absent. Pseudocompound falcigers and compound spinigers absent. Aciculae paired, black, straight and tapering; inferior one somewhat heavier than superior one; cross-sections round. Subacicular hooks black, bidentate; first present from setiger 30. Hooks (Figure 35q) tapering evenly from the middle; head indistinct; both teeth directed distally.

UNKNOWN MORPHOLOGICAL FEATURES.—Structure of prostomium; relationship between Mx III and left Mx IV; pygidium and anal cirri.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—Mx III short, forming part of distal arc with left Mx IV.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 22, 56, 58, 59. Unknown Characters: 1–17, 19, 20, 23, 25, 26, 28, 36, 40, 51, 54, 65–68,74, 78,81,82.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.