A Review of the Genus Eunice - Smithsonian Institution Libraries
A Review of the Genus Eunice - Smithsonian Institution Libraries
A Review of the Genus Eunice - Smithsonian Institution Libraries
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NUMBER 523 299<br />
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—<br />
None.<br />
REMARKS.—Claparede did not leave any type material; <strong>the</strong><br />
specimen examined is one <strong>of</strong> <strong>the</strong> specimens on which Fauvel<br />
based his definition <strong>of</strong> <strong>the</strong> species; it agrees with Claparede's<br />
description and confirms <strong>the</strong> description <strong>of</strong> <strong>the</strong> species given by<br />
Fauvel and used in all later publications. The species is listed<br />
with similar species in Tables 22 and 23. <strong>Eunice</strong> schizobranchia<br />
is unique in having translucent, nearly clear subacicular<br />
hooks and dark aciculae. Branchiae start very late and are<br />
continued to <strong>the</strong> far posterior end.<br />
208. <strong>Eunice</strong> scombrinis Quatrefages, 1866<br />
FIGURE 101; TABLES 27,28<br />
<strong>Eunice</strong> scombrinis Quatrefages, 1866:319-320.—Grubc, 1870a:296-297.<br />
MATERIAL EXAMINED.—MNHN, Paris A.l(R.)-l868-no.<br />
54a, Guayaquil, Ecuador, coll. Eydoux and Souleyet.<br />
DESCRIPTION.—Holotype complete, <strong>of</strong> unknown sex, with<br />
130 setigers. Total length 47 mm; maximal width 4 mm at<br />
setiger 10. Length through setiger 10, 7 mm. Anterior half <strong>of</strong><br />
body cylindrical; posterior half strongly dorsoventrally flattened.<br />
All segments short and crowded.<br />
Prostomium frontally rounded, dorsally inflated; median<br />
sulcus deep. Prostomium distinctly shorter than peristomium,<br />
about as wide as peristomium, less than x li as deep as<br />
peristomium. Both prostomial lobes separated into lobes by<br />
transverse frontal grooves. Eyes not observed. Antennae in a<br />
deep horseshoe, evenly spaced, similar in thickness. Ceratophores<br />
short and ring-shaped in all antennae, without articulations.<br />
Ceratostyles tapering, without articulations. A-I to<br />
second peristomial ring; A-II and A-III to setiger 3; A-III<br />
slightly longer than A-II. Peristomium cylindrical with distinct<br />
muscular, scalloped lower lip. Separation between peristomial<br />
rings distinct dorsally and ventrally; anterior ring 9 /io <strong>of</strong> total<br />
peristomial length. Peristomial cirri barely outreach posterior<br />
peristomial ring. Peristomial cirri tapering, without articulations.<br />
Maxillary formula 1+1, 9+, 8+0, 7+9, 1+1, 1+1. Right Mx<br />
II damaged. Mx III long; located left Mx II. All teeth long and<br />
delicate.<br />
Branchiae present, pectinate, distinctly longer than notopodial<br />
cirri, not reduced in mid-body region. Branchial stems<br />
flexible. Branchiae present from setiger 7 to posterior end.<br />
Branchiae present to near posterior end, present on more than<br />
65% <strong>of</strong> total number <strong>of</strong> setigers. First and last 5 pairs <strong>of</strong><br />
branchiae single filaments. Maximum 17 branchial filaments<br />
present. Branchial filaments slender, shorter than notopodial<br />
cirri, digitiform.<br />
Neuropodial acicular lobe distally truncate; aciculae emerging<br />
dorsal to midline. All presetal lobes low transverse folds.<br />
Anterior postsetal lobes project as free, rounded lobes; median<br />
and posterior postsetal lobes follow outline <strong>of</strong> acicular lobes<br />
closely. Anterior ventral cirri thick and tapering. Ventral cirri<br />
basally inflated from about setiger 6; inflated bases continued<br />
through rest <strong>of</strong> body. Inflated bases thick, transverse welts.<br />
Ventral cirri with short, button-shaped free tip in all setigers.<br />
Upper, free edge <strong>of</strong> ventral cirri scoop-shaped in median and<br />
posterior setigers. Notopodia supported by internal aciculae; all<br />
notopodial cirri basally strongly inflated, strongly tapered.<br />
Inferior lower edge produced as small, free lobe in all except<br />
first 2 parapodia. Notopodial cirri without articulations.<br />
Limbate setae smooth, slender. Pectinate setae numbering<br />
2-3 in median and posterior parapodia. Pectinate setae<br />
tapering, flat. One marginal tooth slightly longer than o<strong>the</strong>r<br />
teeth; total number <strong>of</strong> teeth -15. Shafts <strong>of</strong> compound falcigers<br />
tapering; distal beak; marginal serrations and internal striations<br />
absent. Appendages short, strongly tapering to large head,<br />
bidentate. Proximal tooth conical, shorter than distal teeth,<br />
directed laterally. Distal teeth directed obliquely distally,<br />
distinctly curved. Guards asymmetrically bluntly pointed,<br />
marginally smooth, without mucro. Pseudocompound and<br />
falcigers and compound spinigers absent. Aciculae paired, dark<br />
brown, tapering, distally pointed, straight; cross-section round.<br />
Separation between sheath and core distinct in both aciculae<br />
and subacicular hooks. Subacicular hooks light brown anteriorly,<br />
dark brown posteriorly, bidentate, tapering to small heads.<br />
Subacicular hooks first present from setiger 29, present in all<br />
setigers <strong>the</strong>reafter, usually 3 in a vertical series with slimmest<br />
hook dorsalmost and coarsest hook ventralmost. Both teeth<br />
directed obliquely distally; distal tooth distinctly larger than<br />
proximal teeth. Guards distally smoothly rounded.<br />
UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium and<br />
anal cirri.<br />
EXPECTED STATE OF UNKNOWN MORPHOLOGICAL FEA-<br />
TURES.—None.<br />
CHARACTERS USED IN PREPARATION OF KEY NOT<br />
SCORED.—Inappropriate Characters: 22, 56, 60. Unknown<br />
Characters: 13, 14, 65,66.<br />
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—<br />
None.<br />
REMARKS.—<strong>Eunice</strong> scombrinis is compared to similar<br />
species in Tables 27 and 28. In addition to E. scombrinis, <strong>the</strong><br />
only species listed in Table 28 to have multiple subacicular<br />
hooks in most parapodia is E. sebastiani. In E. sebastiani, <strong>the</strong><br />
appendages <strong>of</strong> <strong>the</strong> compound falcigers are very slender and are<br />
supported by distinctly inflated shafts; in E. scombrinis, <strong>the</strong><br />
appendages are short and tapering and <strong>the</strong> shafts are distally<br />
tapering. The subacicular hooks are bidentate in E. scombrinis<br />
and distally simple and falcate in E. sebastiani.<br />
178. <strong>Eunice</strong> sebastiani Nonato, 1965<br />
FIGURE 102; TABLES 27,28,50<br />
<strong>Eunice</strong> sebastiani Nonato, 1965:133-139, figs. 1-4.<br />
MATERIAL EXAMINED.—Praia do Araca, Sa Sebastiao,