A Review of the Genus Eunice - Smithsonian Institution Libraries

64 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
Eunice aphroditois djiboutiensis Gravier, 1900
Eunice aphroditois djiboutiensis Gravier, 1900:224-229, figs. 73-77; pi. 13:
figs. 63-67.
REMARKS.—Eunice aphroditois djiboutiensis was separated
from the stem species on the structure of the subacicular hooks.
It differs from other members of group B-2 in the features that
characterize distinct species and it is so considered here.
Eunice aphroditois punctata Fishelson and Rullier, 1969
Eunice aphroditois punctata Fishelson and Rullier, 1969:74-76, fig. 2a-e.
REMARKS.—Originally described from the southern end of
the Red Sea, the material currently present in the Zoological
Museum, Tel-Aviv University, includes two specimens of a
species related to, but different from E. aphroditois. The
combination Eunice punctata is preoccupied; the species is
here renamed as Eunice rullieri.
15. Eunice arcturi (Treadwell, 1928)
TABLES 19,20
Leodice arcturi Treadwell, 1928:475-477, fig. 178:32-39.
Eunice norvegica.—Hartman, 1956:283 [in part, not Eunice norvegica
Linnaeus. 1767].
MATERIAL EXAMINED.—Holotype, AMNH 25-VII-1925-
3530, Atlantic Ocean, 125° SE of New York City Hall, sta
113:D-1.
COMMENTS ON MATERIAL EXAMINED.—The holotype has
been completely dried and no meaningful illustrations can be
made.
DESCRIPTION.—Holotype complete with 110 setigers, approximately
80 mm long.
Branchiae from setiger 6 to setiger 42. Branchiae terminating
well before posterior end, present on less than 55% of total
number of setigers. Maximum at least 10 filaments.
Aciculae paired, yellow, tapering; tips conical, distinctly
bent dorsally; cross-section round. Separation between core
and sheath indistinct in both aciculae and subacicular hooks.
Subacicular hooks yellow, bidentate. Hooks first present from
setiger 36.
UKNOWN MORPHOLOGICAL FEATURES.—All features associated
with pro- and peristomium; jaws, parapodial features;
limbate and pectinate setae and compound falcigers.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
The species is far too poorly known to make meaningful
predictions.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: Too poorly known to
determine which of the unknown characters might be inappropriate.
Unknown Characters: 3-29, 31-34, 39, 40, 43-72,
81, 82.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—71,2;
72,2.
REMARKS.—Eunice arcturi was considered a synonym of E.
norvegica by Hartman (1956) after examination of the type of
the former. This synonymy cannot be correct: the latter has
dark subacicular hooks and branchiae continued to the posterior
end. Eunice arcturi has branchiae terminating well before the
posterior end and yellow subacicular hooks. The species is too
poorly known to be adequately characterized; however, it
differs from most members in group A-l by the late start of the
branchiae; it is listed with other species in this group in Tables
19 and 20.
16. Eunice arenosa Kinberg, 1865
FIGURE 13e-h; TABLES 19.20
Eunice arenosa Kinberg, 1865:563.—Hartman, 1948:78.
MATERIAL EXAMINED.—TWO syntypes, RM 426, Tahiti, 16
m, Eugenie expedition.
COMMENTS ON MATERIAL EXAMINED.—Kinberg
(1865:563) gives the locality information as "Marc pacificum
juxta urbcm Papicti insulae Tahiti, fundo arenosa 9 orgyiarum."
One syntype is complete; the other is currently in two pieces.
The latter specimen is here illustrated and described in detail.
Both specimens are mature females with large eggs in the body
cavity.
DESCRIPTION.—Complete syntype with 79 setigers; other
syntype incomplete, with 60 setigers, 16 mm long, maximal
width 0.75 mm at setiger 10; length through setiger 10,2.5 mm.
Body cylindrical anteriorly, dorsoventrally flattened posteriorly.
Prostomium (Figure 13e) about as long as peristomium,
about as wide as peristomium, as deep as x ji of the
peristomium. Prostomial lobes elongated, frontally rounded,
dorsally flattened; median sulcus shallow. Palpal region
separated by distinct frontal, horizontal grooves. Eyes not
observed. Antennae in a horseshoe, evenly spaced, similar in
thickness. Ceratophores ring-shaped in all antennae, without
articulations. Ceratostyles slender and digitiform, with up to 8
long, cylindrical articulations in A-III. A-I to setiger 1; A-II to
setiger 3; A-III to setiger 5. Peristomium tapering towards
anterior end. Separation between rings distinct on all sides;
anterior ring x li of total peristomial length. Peristomial cirri to
middle of prostomium, slender and tapering, with 4 articulations.
Jaws unknown.
Branchiae present, pectinate, distinctly longer than notopodial
cirri, not reduced in mid-body region, erect. Branchiae
from setiger 3 through setiger 25-26. Branchiae terminating
well before posterior end, present on less than 55% of total
number of setigers. First 5 and last 2-3 pairs single filaments;
maximum 5 filaments first reached at about setiger 15.
Filaments short, digitiform, about as long as notopodial cirri
where best developed.
Anterior neuropodial acicular lobes truncate, becoming
distally rounded in posterior setigers; aciculae emerging at