A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 201
near posterior end, present on more than 65% of total number
of setigers. First and last 15 branchiae single filaments,
maximum 8 filaments. Stems slender, tapering, longer than
notopodial cirri. Filaments digitiform, shorter than notopodial
cirri.
Neuropodial acicular lobes obliquely conical with aciculae
emerging from tips of lobes, dorsal to midline. Presetal lobes
low, transverse folds. Postsetal lobes free, about as long as
acicular lobes, visible behind acicular lobes. Anterior ventral
cirri thick, tapering, becoming ventrally inflated from about
setiger 10. Inflated bases forming short transverse inflated
ridges along lower edge of parapodia; narrow tips long and
digitiform. Posterior to setiger 45 ventral cirri increasingly
digitiform, elongated. Notopodial cirri digitiform, tapering,
similar in length. Anterior notopodial cirri articulated (Figure
66k), loosing articulations in early branchial setigers.
Limbate setae long, slender, very narrowly limbate, marginally
smooth. Pectinate setae (Figure 66h) narrow, tapering, flat.
One marginal tooth longer than other teeth, with 7 teeth in
anterior setigers and 12 teeth in median and posterior sctigers.
Shafts of anterior compound falcigcrs (Figure 66i,j) inflated,
becoming tapering in median and posterior setigers (Figure
66n), all marginally smooth. Anterior appendages relatively
short, tapering, with small heads, bidentate. Proximal teeth
shorter than distal teeth, tapering, directed obliquely distally.
Distal teeth long, slender, strongly curved. Median appendages
very slender, with large heads, bidentate. Proximal teeth much
larger than distal teeth, strongly tapering, directed laterally.
Distal teeth strongly tapering, directed obliquely distally.
Anterior guards symmetrically bluntly pointed, becoming
distinctly rounded in posterior setigers, marginally smooth;
mucros absent. Pseudocompound falcigers and compound
spinigers absent. Aciculae (Figure 66m) paired, with dark
brown to black cores and clear sheaths, slender, tapering,
distinctly curved dorsally; cross-sections round. Subacicular
hooks (Figure 66o) with dark brown to black cores and clear
sheaths, bidentate. Hooks first present from setiger 18, present
in all setigers thereafter, always single (except for replacements).
Hooks slender, tapering, with distinct heads. Proximal
teeth larger than distal teeth, directed laterally. Distal teeth
slender, curved.
UNKNOWN MORPHOLOGICAL FEATURES.—Jaw structure;
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: 4, 6, 23,42.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice longisetis belongs to group B-2 and is
listed with similar species in Tables 27 and 30. The only
unusual feature, compared to the other species in Table 30,
appears to be the high number of posterior branchiated setigers
with single filaments; most species listed in this table have a
maximum of five; E. longisetis and E. fimbriata have 15 and
10-12, respectively. The latter have branchiae terminating well
before the posterior end; in E. longisetis the branchiae are
continued to the far posterior setigers.
Eunice lucei Grube, 1856:57-58.
109. Eunice lucei Grube, 1856
FIGURE 67; TABLE 6
MATERIAL EXAMINED.—Lectotype and 3 paralectotypes,
and a posterior fragments, ZMC (uncataloged), Puntarenas,
Costa Rica, coll. H. KrOyer, 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 670 distinctly shorter and narrower
than peristomium, less than l /2 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 l /s of A-II and A-IH
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 4 /s 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