A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 101
characters, best explored by comparing the illustrations of the
two species.
Hansen's complete description ofNicidion incerta consisted
of the following statement (1882:8):
The animal resembles N. gallopagensis Kinberg closely; the dorsal cirri are
however slighily longer and the setae appear different from those illustrated by
Kinberg.
[Original in French, translation by K. Fauchald.]
Hansen's illustration of the anterior end shows the prostomium
as shallowly incised; the antennae are short; none
reaching beyond the peristomium and without articulations.
His illustration of the parapodium shows the ventral cirrus to be
basally spherically inflated with a digitiform tip.
Augcncr reviewed the type at one time and left a note in the
vial: "Presumably the abranchiate form of Eunice cariboea Gr.
(Kr.)."
Hansen's species is here considered a synonym of E.
cariboea.
38. Eunice cedroensis Fauchald, 1970
FIGURE 30a-e; TABLES 41, 42
Eunice cedroensis Fauchald, 1970:29-31, pi. 2: figs. a-e.
MATERIAL EXAMINED.—Holotype, AHF Poly 0336, Baja
California, Mexico, 4 miles N of Isla Todos Santos,
31°53'2O"N, 116°48'15"W,75 m, shell, mud, gray sand, 24 Feb
1941, Velero III, sta 1245-41.
DESCRIPTION.—Holotype incomplete with 32 setigers;
length 10 mm; maximum width 2 mm at setiger 10. Length
through setiger 10, 3 mm. Body cylindrical, becoming slightly
ventrally flattened posteriorly. Anterior end abruptly tapered;
body tapering slowly posteriorly from about setiger 10.
Prostomium (Figure 30a) about as long and wide as
peristomium, as deep as l /2 of the peristomium. Prostomial
lobes frontally truncate, dorsally slightly inflated; median
sulcus shallow. Eyes black, posterior to bases of A-I. Palpal
region marked by 2 shallow circular grooves frontally on each
prostomial lobe. Antennae in a horseshoe, evenly spaced,
similar in thickness. Ceratophores ring-shaped in all antennae,
without articulations. Ceratostyles slender and tapering, with
maximum 5 long, cylindrical articulations in A-III. A-I to
setiger 1; A-II to setiger 7; A-III to setiger 13. Peristomium
tapering towards anterior end, longer ventrally than dorsally.
Separation between rings distinct on all sides; anterior ring 2 h
of total peristomial length. Peristomial cirri to middle of
prostomium, slender and tapering, without articulations.
Maxillary formula 1+1, 7+8, 9+0, 8+10, and 1+1. Mx VI
absent; Mx III long, located behind left Mx II.
Branchiae (Figure 30b) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 3 through setiger 27. First 2 and last 3
pairs single filaments; all others with 3 or more filaments;
maximum 10 filaments by setiger 10. Branchial stems tapering.
Filaments longer than notopodial cirri except in first 2 and last
3 branchiated setigers; filaments digitiform, relatively slender.
Anterior neuropodial acicular lobes obliquely truncate, with
aciculae emerging at midline but ventral to high point; acicular
lobes becoming symmetrically rounded in first branchial
setigers, retaining that shape in rest of body. Anterior and
median pre- and postsetal lobes low, transverse folds. Ventral
cirri tapering in first 5 setigers. Ventral cirri basally inflated in
branchial region, retaining modestly inflated, ovate bases in
remainder of specimen; narrow tips tapering. Anterior and
median notopodial cirri tapering, with 3 or 4 articulations.
Limbate setae longer than other setae, slender, marginally
smooth. Pectinate setae (Figure 30d) small; shafts coarse,
cylindrical; blades tapering, flat. One marginal tooth longer and
thicker than other teeth; a total of 10 teeth in a seta. Shafts of
compound falcigers (Figure 30c) distally inflated, marginally
serrated, with distinct distal beak. Appendages long, narrow,
tapering; head very small, but distinct, bidentate. Proximal
teeth triangular, directed laterally, about twice as large as distal
teeth. Distal teeth tapering, erect, slender. Guards symmetrically
tapering, with long, narrow mucros. Pseudocompound
falcigers and compound spinigers absent. Aciculae single,
yellow, tapering to blunt, straight tips; cross-section round.
Separation of core and sheath indistinct in both aciculae and
subacicular hooks. Subacicular hooks (Figure 30e) yellow,
tridentate with teeth in a crest. Hooks first present from setiger
17, present in all setigers thereafter, always single (except for
replacements). Hooks slightly tapering. All teeth curved; teeth
decreasing evenly in size distally.
UKNOWN MORPHOLOGICAL FEATURES.—All features associated
with the posterior setigers.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56. Unknown Characters:
1,2,37,38,47,50,57-60,63.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,2;
38,2.
REMARKS.—Eunice cedroensis is listed with similar species
in Tables 41 and 42. Of the species in Table 42, five have the
three median antennae similar in length. In addition to E.
cedroensis, these species are E. americana, E. multicylindri, E.
rubrivittata, and E. unifrons. Of these five, two species have 10
or more branchial filaments, E. cedroensis and E. americana.
The latter has up to 20 filaments; the former 10 filaments.
Eunice challenged Mclntosh, 1885
Eunice challenged Mclntosh, 1885:293.
REMARKS.—This species is known only from the following
quote in Mclntosh's discussion of E. barvicensis (1885:293):
"The hook somewhat approaches that of Eunice challengeri,
but the other differences between the species are sufficiendy