Eunice langi (Treadwell 1943)

Eunice langi (Treadwell, 1943)

Leodice langi Treadwell, 1943:3, figs. 14–18.

Eunice savignyi.—Hartman, 1956:283 [not Eunice savignyi Grube, 1878].

MATERIAL EXAMINED.—Holotype, AMHN 3739, Cape Town, South Africa.

COMMENTS ON MATERIAL EXAMINED.—The anterior end has been badly mangled and partly dissected, and all antennae are lost, so no illustrations were attempted of the anterior end.

DESCRIPTION.—Holotype complete, of unknown sex, with 71 setigers; total length 42 mm; maximal width 2 mm; length through setiger 10, 5.5 mm.

Prostomial lobes frontally obliquely truncate, dorsally flattened; median sulcus shallow. Eyes not observed. Ceratophores ring-shaped in all antennae. Ceratostyles missing. Peristomial rings distinct dorsally and ventrally; anterior ring of total peristomial length. Peristomial cirri to setiger 3, with 6 distinct articulations.

Maxillary formula 1+1,6+5, 9+0,6+?8, and presumably 1+1 according to Treadwell (1943, fig. 18).

Branchiae (Figure 61k) present, pectinate, distinctly longer than notopodial cirri, not reduced in mid-body region, erect. Branchiae from setiger 3 to setiger 39. Maximum 8 filaments at or near setiger 15; most branchiae with 4 or 5 filaments. Stems stout, strongly tapered, shorter than notopodial cirri. Filaments digitiform, about as long as notopodial cirri.

Anterior neuropodial acicular lobes distally truncate; posterior acicular lobes (Figure 61j) obliquely conical; aciculae emerging at midline. Pre- and postsetal lobes low, transverse folds. First 4 ventral cirri very long, digitiform, as long as notopodial cirri. Ventral cirri basally inflated from setiger 5 to setiger 36, with distinct, digitiform, obliquely attached tips. Inflated bases increasing evenly from setiger 5 to setiger 15, ovate, decreasing from setiger 30, missing posterior to setiger 36. Posterior ventral cirri short, nearly tubercular. Anterior notopodial cirri slender, digitiform; posterior notopodial cirri long, tapering. Notopodial cirri without articulations.

Shafts of pectinate setae (Figure 61m) slender, cylindrical. Blades flat, strongly flaring. One marginal tooth longer than other teeth, with ˜15 teeth. Shafts of compound falcigers (Figure 61l) gently inflated, marginally smooth. Appendages long, tapering; heads very small, bidentate. Proximal teeth much smaller than distal teeth, very short, triangular, directed laterally. Distal teeth tapering, nearly erect. Guards asymmetrically sharply pointed; mucros absent. Pseudocompound falcigers and compound spinigers absent. Aciculae (Figure 61n) single, amber-colored, tapering, distinctly bent in median and posterior setigers; cross-sections round. Subacicular hooks (Figure 61o) amber colored, bidentate. Hooks first present from setiger 30, present in all setigers thereafter, always single (except for replacements). Hooks tapering; heads small, distinctly curved. Proximal and distal teeth similar in size. Proximal teeth directed laterally, blunt. Distal teeth truncate, directed laterally.

UNKNOWN MORPHOLOGICAL FEATURES.—Prostomial features; relationship between Mx III and left Mx IV; pygidium and anal cirri.

EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—Mx III short; forming a distal arc with left Mx IV.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 56, 58, 59. Unknown Characters: 4, 6, 10–17, 19–24, 39–40, 74, 78.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—21,2.