Eunice purpurea Grube 1866

Eunice purpurea Grube, 1866

Eunice purpurea Grube, 1866b:68.

Eunice violacea.—Grube, 1861:60–61 [not Eunice violacea Grube, 1856].

MATERIAL EXAMINED.—TWO syntypes, ZMB F 2012, Portoré, Lesina, Adriatic Sea, coll. Grube.

COMMENTS ON MATERIAL EXAMINED.—The description is based wholly on the large specimen; some notes on the small specimen, which is a juvenile, have been appended. The peristomium of the large specimen has been ventrally dissected and the jaw apparatus torn partially loose; the illustration shows the condition with the jaws tucked back into position, but is in part a reconstruction where tissue had been removed.

DESCRIPTION.—Large syntype complete with 106 setigers; total length 53 mm; maximal width 4 mm; length through setiger 10, 9.5 mm. Other syntype with 40 setigers; length 7 mm long.

Prostomium (Figure 94a) distinctly shorter and narrower than peristomium, as deep as of the peristomium. Prostomial lobes frontally rounded, dorsally inflated; median sulcus deep. Peristomial fold completely everted making region posterior to antennal bases appear very long. Eyes between bases of A-I and A-II. Antennae in a horseshoe, evenly spaced, similar in thickness. Ceratophores ring-shaped in all antennae, without articulations. Ceratostyles tapering, with up to 13 cylindrical articulations in A-III. A-I to posterior peristomial ring; A-II and A-III to setiger 2. Peristomium slightly flaring anteriorly, with distinct muscular lower lip. Separation between rings visible ventrally, slightly better marked dorsally; anterior ring of total peristomial length. Peristomial cirri to middle of anterior peristomial ring, digitiform, with 3 cylindrical rings.

Maxillary formula 1+1, 4+5, 7+0, 2+7, and 1+1. Mx III part of distal arc with left Mx IV. Left Mx IV continued as edentate plate behind Mx III. Mx VI absent.

Branchiae (Figure 94b) present, pectinate, distinctly longer than notopodial cirri, not reduced in mid-body region, erect. Branchiae from setiger 5 to setiger 100. Branchiae present to near posterior end, present on more than 65% of total number of setigers. First 3 and last 10 pairs single filaments; maximum 14 filaments at about setiger 20. First 2 pairs short, nearly button-shaped. Branchial stems long, erect, often curved in half corkscrew posteriorly. Filaments short, slender.

Neuropodial acicular lobes distally rounded, very low; aciculae emerging at midline. All pre- and postsetal lobes follow outline of acicular lobes closely. First 4 ventral cirri tapering. Ventral cirri with inflated bases between setigers 5 and 50. Inflated bases thick, transverse welts; narrow tips short and button-shaped. Posterior to setiger 50 ventral cirri becoming tapering, increasing in relative length, becoming about as long as notopodial cirri in last setigers present. First 50 notopodial cirri basally distinctly inflated, with decreasing numbers of articulations, up to 4 articulations; last articulated notopodial cirrus in setiger 55. Posterior notopodial cirri increasingly slender, decreasing in length to roughly of length in anterior setigers.

Limbate setae marginally smooth. Median pectinate setae (Figure 94c) flaring, flat. One marginal tooth distinctly longer than other teeth; ~15 teeth present. Compound falcigers (Figure 94e) very large. Shafts tapering, marginally smooth. Appendages tapering, with large heads, bidentate. Proximal teeth longer than distal teeth, triangular, directed laterally. Distal teeth tapering relatively abruptly, distinctly bent. Guards symmetrically rounded, marginally serrated; mucros absent. Pseudocompound falcigers and compound spinigers absent. Aciculae paired, with brown cores and clear sheaths, tapering; cross-sections round. Subacicular hooks (Figure 94d) with brown cores and clear sheaths, bidentate. Hooks first present from setiger 19, present in all setigers thereafter, always single (except for replacements). Hooks very slender, tapering to small head. Proximal teeth very much larger than distal teeth, triangular, directed laterally. Distal teeth slender, curved.

UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium and anal cirri.

EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEATURES.—None.

CHARACTERS USED IN PREPARATION OF KEY NOT SCORED.—Inappropriate Characters: 56, 58, 59. Unknown Characters: 4, 6.

ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—None.

Eunice cingulata Claparède, 1868

Eunice cingulata Claparède, 1868:444–445, pl. 7: fig. 1.

Eunice purpurea.—Grube, 1878a:100.