A Review of the Genus Eunice - Smithsonian Institution Libraries

104 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
Eunice cirribranchis Grube, 1870
Eunice cirribranchis Grube, 1870b:55; 1878a:99.
REMARKS.—Grube characterized this species briefly as
having strongly articulated, moniliform antennae; branchiae
present from setiger 6 through 72 (of 123 segments present)
and with only a single branchial filament. Peristomial cirri and
notopodial cirri lacked articulations. Branchiae and notopodial
cirri were similar in length.
Grube (1878a:99) listed the species among those that had
branchiae limited to some anteromedian setigers, and distinctly
articulated antennae, in his subgenus Leodice; most other
members in this grouping are now considered members of
group C-l.
Eunice cirribranchis is, however, so poorly characterized
that without access to the types and additional material, it must
be considered indeterminable. It was originally described from
Fiji.
40. Eunice cirrobranchiata Mclntosh, 1885
FIGURE 31a-h; TABLES 33,36,52, 53
Eunice cirrobranchiata Mclntosh, 1885:277-278, pi. 38: figs. 9-11, pi. 19A:
figs. 21-24.
MATERIAL EXAMINED.—Two syntypes, BM(NH) ZK.
1885.12.1.196a. Bermuda, between tidemarks, Jun 1873.
COMMENTS.—Both syntypes are incomplete; the larger one
has been frontally dissected and most setae are broken.
DESCRIPTION.—Large syntype with 123 setigers; length 30
mm; maximal width 3 mm; length through setiger 10, 6 mm.
Small syntype with 45 setigers; length 18 mm; maximal width
3 mm; length through setiger 10, 5.5 mm. All segments very
short and crowded; parapodia supported on high triangular
lateral ridges in posterior ends of both fragments.
Prostomium (Figure 31a, illustration of small syntype)
distinctly shorter and narrower than peristomium, as deep as x li
of the peristomium. Prostomial lobes frontally rounded,
dorsally excavate with a thickened rim; median sulcus shallow.
Eyes posterior to bases of A-I, black. Antennae in horseshoe,
evenly spaced, similar in thickness. Ceratophores ring-shaped
in all antennae, without articulations. Ceratostyles thick and
digitiform, with up to 3 irregular, cylindrical articulations each,
in addition to wrinkles. Antennae to middle or posterior end of
peristomium; A-I shortest; A-III longest. Peristomium cylindrical
with distinct muscular lower lip. Separation between rings
distinct dorsally; anterior ring 9 /io of total peristomial length; a
shallow crease dividing ventral side with anterior part 5 /6 of
total length of ventral side. Dorsal and ventral grooves not
matching. Peristomial cirri to middle of peristomium, without
articulations.
Maxillary formula 1+1, 5+5, 6+0, 1+6, and 1+1. Mx VI
absent. Mx III short, part of distal arc with Mx IV and V.
Branchiae present, palmate, distinctly longer than notopodial
cirri, not reduced in mid-body region. Branchiae from setigcr
22 in small and from setiger 30 in large syntypc, continued to
ends of fragments. Maximally 2 long, narrow branchial
filaments present; most segments with single filaments.
Anterior ncuropodial acicular lobes truncate, from about
setigcr 25, acicular lobes reduced, represented by single, large
aciculae emerging directly from body wall (Figure 310;
aciculae emerging at midline. Body wall forming high
transverse ridges on both sides of the body. Pre- and postsetal
lobes follow outline of acicular lobes closely. First 4 ventral
cirri thick and digitiform. Bases of ventral cirri increasingly
elongated from setiger 5, with short digitiform tips in all
setigers. From about setiger 20 ventral cirri elongated,
glandular ridges making up lower edge of fleshy ridges
supporting setae. All noiopodial cirri medially inflated, without
articulations, longer in posterior than in anterior sciigcrs.
Shafts of pectinate setae (Figure 3Id) slender, cylindrical.
Blades flared, furled, forming an open scoop. Both marginal
teeth slightly longer than other teeth, with -15 teeth. Shafts of
compound falcigcrs (Figure 31c,h) inflated, marginally
smooth; distal beaks and internal striations absent. Appendages
short; heads relatively large, bidcntaic. Proximal teeth larger
than distal teeth, tapering, directed laterally. Distal teeth short,
tapering, directed obliquely distally or laterally. Guards
symmetrically rounded, marginally frayed in most hooks,
without mucros. Pseudocompound falcigers and compound
spinigers absent. Aciculae single (Figure 31b,g), very heavy,
with light to dark brown cores and clear sheaths, with distinct
narrow neck, asymmetrically hammer-headed distally; distal
ends of acicular shafts curved in some parapodia; crosssections
round. Subacicular hooks (Figure 31e) with dark
brown cores and clear sheaths, bidentate or tridentate with teeth
in tandem. Hooks first present from setiger 17 or 24, present in
all setigers thereafter, always single (except for replacements).
Hooks strongly curved, strongly beaked in appearance. Main
fangs very large and curved, with paired lateral denticles in
some hooks; distal fangs smaller but similar in shape.
UNKNOWN MORPHOLOGICAL FEATURES.—Features associated
with far posterior setigers; pygidium and anal cirri.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 34, 56, 60. Unknown
Characters: 1, 2,4, 6, 36-40,63.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,1;
38,1.
REMARKS.—Eunice cirrobranchiata is usually considered a
synonym of E.fdamentosa (see Hartman, 1959) and little in the
description of the two species differs. Mclntosh stated that he
had only a single 30 mm anterior fragment at his disposal and
that specimen had been dried out. The larger of the two
specimens is certainly the one described by Mclntosh; all
information given matches the specimen closely. It does not
appear to have been seriously dried out. The provenance of the