Leodice lucei (Grube 1856)

Eunice lucei Grube, 1856

Eunice lucei Grube, 1856:57–58.

MATERIAL EXAMINED.—Lectotype and 3 paralectotypes, and a posterior fragments, ZMC (uncataloged), Puntarenas, Costa Rica, coll. H. Kröyer, 1846.

DESCRIPTION.—Lectotype of unknown sex, with 170 setigers, missing perhaps 15 setigers; length 93 mm; maximal width 3 mm at about setiger 40; length through setiger 10, 5.5 mm.

Prostomium (Figure 67f) distinctly shorter and narrower than peristomium, less than as deep as peristomium. Prostomial lobes frontally rounded, dorsally inflated; median sulcus deep. Palpal region marked by vague frontal horizontal groove. Eyes posterior to bases of A-I, dark. Antennae in horseshoe; A-I separated from other antennae by gap, similar in thickness. Ceratophores ring-shaped, in all antennae, without articulations. Ceratostyles tapering, with up to 14 very distinct, nearly moniliform articulations; inner 1/5 of A-II and A-III without articulations. A-I to middle of anterior peristomial ring; A-II to setiger 1; A-III to setiger 3. Antennae of paralectotypes slightly shorter, but otherwise similar. Peristomium basically cylindrical with large, inflated lower lip. Separation between rings distinct on all sides; anterior ring of total peristomial length. Peristomial cirri to middle of peristomium, slightly inflated basally, tapering to fine, slender tips, with up to 7 distinct, cylindrical articulations.

Maxillary formula of 1 paralectotype 1+1, 7+7, 9+0, 4+10, and 1+1. Mx III long, located behind left Mx II. Mx VI missing.

Branchiae (Figure 67a) present, pectinate, distinctly longer than notopodial cirri, not reduced in mid-body region, erect. Branchiae from setiger 5 to setiger 168. Branchiae present to near posterior end, present on more than 65% of total number of setigers. First and at least last 10–15 pairs short, single filaments (Figure 67h), maximum 8 filaments. Stems relatively slender, tapering, as long as notopodial cirri. Filaments slender, as long as notopodial cirri.

Anterior neuropodial acicular lobes truncate, becoming rounded in median setigers and conical in last setigers present; aciculae emerging above midline. Pre- and postsetal lobes low, transverse folds. Anterior ventral cirri thick, tapering, becoming basally inflated from about setiger 5. Inflated bases of median region thick, inflated ridges; narrow tips very short and button-shaped. From about setiger 80 ventral cirri increasingly dominated by a long, tapering distal tip; inflated bases decreasing. Last 20 ventral cirri present long, digitiform, flexed up behind neuropodial acicular lobe. Notopodial cirri basally inflated, with 5 to 6 cylindrical articulations. Notopodial cirri of posterior setigers very large, longer than in anterior setigers and nearly as wide at base as neuropodial acicular lobe.

Limbate setae slender, marginally smooth. Pectinate setae (Figure 67d) tapering, flat. One marginal tooth slightly longer than other teeth, with 15 teeth. Shafts of compound falcigers (Figure 67c, k) distally slightly inflated, marginally serrated. Anterior appendages (Figure 67c) slender, tapering, bidentate. Proximal teeth thicker, but shorter than distal teeth, triangular, directed laterally. Distal teeth nearly erect. Guards symmetrically rounded, with short, distinct mucros, marginally serrated. Posterior appendages (Figure 67k) thicker, bidentate. Proximal teeth smaller than distal teeth, short, triangular. Distal teeth large, thick, distinctly bent. Guards asymmetrically bluntly pointed, marginally serrated; mucros absent. Compound hooks of paralectotypes with both kinds of appendages as well. Pseudocompound falcigers and compound spinigers absent. Aciculae paired, yellow, most distinctly hammer-headed, nearly bifid (Figure 67e,g,j), some superior aciculae tapering, straight; cross-sections round. Separation between core and sheath indistinct in both aciculae and subacicular hooks. Subacicular hooks (Figure 67b, i) yellow, tridentate with teeth in a crest. Hooks first present from setiger 24–34, present in all setigers thereafter, always single (except for replacements). Main fangs large curved; fangs decreasing evenly in size to slender, distinct tertiary fangs.

UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium and anal cirri.

EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—None.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 56, 58, 59. Unknown Characters: 1,2,6,40,42.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.