A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 107
very short. Shafts slender and cylindrical. Blades flat, flaring.
One marginal tooth longer and thicker than other teeth; with
-15 teeth. In median and posterior setigers number and size of
pectinate setae increasing, by setiger 50 dominant kind of setae
in dorsal fascicles. Shafts of median and posterior pectinate
setae (Figure 311) slender, cylindrical. Blades flaring, flat. One
marginal tooth longer, but not thicker than other teeth; about 25
teeth present. Shafts of compound falcigers (Figure 31j)
tapering, marginally smooth, without internal striations or
distal beaks. Appendages wide-based, triangular, bidentate.
Proximal teeth a slight elevation on side of appendage. Distal
teeth distinctly larger than proximal teeth, nearly erect, thick.
Guards fit appendages closely, visible only on cutting edge,
without mucros. Pseudocompound falcigers and compound
spinigers absent. Aciculae paired, amber to dark brown;
anterior superior aciculae (Figure 31k) tapering distally to fine
slender tips; other aciculae taper distally to blunt, truncate tip;
cross-section round. Superior aciculae gently curved dorsally;
inferior aciculae straight. Fine amber-colored notopodial
aciculae present. Subacicular hooks (Figure 31m) ambercolored
to dark brown, bidentate. Hooks first present from
setiger 38-39, present in all setigers thereafter, always single
(except for replacements). Hooks slender, tapering to distinct
heads. Proximal teeth shorter, but wider than distal teeth, blunt,
erect. Distal teeth tapering, erect.
UNKNOWN MORPHOLOGICAL FEATURES.—Relationship between
Mx III and left Mx IV; distribution of branchiae on
posterior end; pygidium and anal cirri.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
Mx III short, forming a distal arc with left Mx IV. Branchiae
absent on posterior half of body.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 60. Unknown
Characters: 1, 2,4, 6, 13, 14, 36, 38, 40, 74, 78.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—38,2.
REMARKS.—Eunice coccinea is listed with similar species in
Tables 24 and 25. It is also listed in Tables 27 and 30, because
the branchiae continue beyond setiger 100 (one of the defining
characters of group B-2 in Fauchald, 1970).
Among the species in Table 25, E. rosaurae and E. coccinea
have basally inflated ventral cirri continued to the posterior
end. Eunice rosaurae has both bi- and tridentate subacicular
hooks of which the latter have the teeth in tandem; E. coccinea
has only bidentate subacicular hooks. In addition, E. rosaurae
has only single branchial filaments; E. coccinea has pectinate
branchiae with up to 10 filaments.
Of species listed in Table 30, E. coccinea, E.fimbriata, and
E. reducta have the branchiae terminating well before the
posterior end. Of these three species, only E. coccinea has
basally inflated ventral cirri in the posterior end; in both the
other species, the inflated region is missing in the posterior end.
42. Eunice coccinioides Augener, 1922
FIGURE 32; TABLJES 24,26
Eunice coccinioides Augener, 1922b:45.
Eunice fucata.—Augener, 1918:316-319, fig. 31 [not Eunice fucata Ehlers,
1887].
MATERIAL EXAMINED.—TWO syntypes, ZMH V-5693, Isla
Annobon, Angola, 7 Oct 1911, coll. Arn. Schultze
COMMENTS ON MATERIAL EXAMINED.—Augener (1918)
gives a detailed description of the specimens from Isla
Annobon; the description fits rather well with the specimens
listed as types and Isla Annobon is here considered the type
locality.
The sample contains two anterior ends and a series of median
and posterior ends; of these one median piece and three
posterior ends fit the anterior ends. One posterior end belongs
to a species in group B-2; it is strongly branchiated even in the
last setigers present and has dark brown or black subacicular
hooks. Five median and posterior fragments lack subacicular
hooks entirely and may belong to a species of Palola. The
longer of the syntypes is described in detail.
DESCRIPTION.—Longer syntype incomplete, of unknown
sex, with 133 setigers; length 80 mm long; maximal width 5
mm at setiger 20; length through setiger 10, 8 mm. Short
syntype incomplete, of unknown sex, with 56 setigers; total
length 32 mm; maximal width 4.5 mm at setiger 15; length
through setiger 10, 7 mm.
Prostomium (Figure 32a) distinctly shorter than peristomium,
about as wide as peristomium, less than x li as deep as
peristomium. Prostomial lobes frontally rounded, dorsally
inflated; median sulcus deep. Eyes on ceratophores of A-I,
black. Antennae in shallow horseshoe, evenly spaced, similar
in thickness. Ceratophores of A-I short, truncate cones; A-I I
and A-III with ring-shaped ceratophores; all ceratophores
without articulations. Ceratostyles tapering, without articulations.
A-I to middle of anterior peristomial ring; A-II to setiger
2; A-III to setiger 3. Peristomium massive, slightly flaring
anteriorly. Separation between rings distinct dorsally and
ventrally; anterior ring 3 /4 of total peristomial length. Peristomial
cirri to middle of anterior peristomial ring, medially
inflated, without articulations.
Maxillary formula of large syntype 1+1, 6+6, 10+0, 6+12,
and 1+1; maxillary formula of small syntype 1+1, 5+6, 10+0,
5+10, and 1+1. Mx III part of distal arc with left Mx IV. Mx VI
absent.
Branchiae (Figure 32g) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setigers 7 or 8, continued to setiger 78 on large
syntype, leaving roughly half of body abranchiate. Maximum 9
filaments. Stems much longer than notopodial cirri, tapering,
slender, erect. Filaments longer than notopodial cirri, digitiform,
slender.
Anterior neuropodial acicular lobes rounded; posterior
acicular lobes truncate; aciculae emerging dorsal to midline.