A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 269
MATERIAL EXAMINED.—Holotype, BM(NH) 1920.1.5.1,50
miles off Bolus Head, Kerry, Ireland; dredged, 375 m, in
parchment-like tubes on Lophophelia prolifera. Royal Dublin
Society Survey of Western Ireland, 1891.
DESCRIPTION.—Holotype complete, of unknown sex, with
136 setigers; total length 115 mm; maximal width 6 mm; length
through setiger 10, 15 mm. Anterior end cylindrical; middle
and posterior ends dorsoventrally flattened with prominent
parapodia. Anal cirri as long as last 15 setigers.
Prostomium (Figure 89j) distinctly shorter and narrower than
peristomium, as deep as 1 /2 of peristomium, bent ventrally.
Prostomial lobes frontally rounded, dorsally inflated; median
sulcus shallow. Eyes between bases of A-I and A-II, hidden
below peristomial fold in illustration. Antennae in transverse
row, evenly spaced, similar in thickness. Ceratophores ringshaped
in all antennae, without articulations. Ceratostyles
cylindrical, with up to 12 cylindrical, poorly marked articulations
in A-I 11. A-I and A-II to middle of posterior peristomial
ring; A-I 11 to setiger 2. Peristomium -3 times as long as
prostomium, cylindrical. Separation between rings distinct
dorsally and ventrally; anterior ring ~ 3 /4 of total peristomial
length. Peristomial cirri to middle of prostomium, tapering,
with 8 cylindrical articulations.
Jaws not examined.
Branchiae present, pectinate, distinctly shorter than notopodial
cirri, not reduced in mid-body region, flexible. Branchiae
from setiger 6 to setiger 135. Branchiae present to near
posterior end, present on more than 65% of total number of
setigers. First branchia single filaments; maximum 4 filaments.
Stems very short, truncated. Filaments slender, digitiform,
shorter than notopodial cirri.
Anterior neuropodial acicular lobes (Figure 89m) distally
rounded; posterior acicular lobes increasingly obliquely conical
with the high side dorsally (Figure 89n); aciculae emerging
dorsal to midline. Presetal lobes low, oblique folds with high
side dorsally. Postsetal lobes folds following outline of acicular
lobes closely. Anterior ventral cirri broadly attached below
ventral edge of acicular lobes, tapering to blunt tips. Ventral
cirri strongly inflated basally from about setiger 4 through
setiger 45; inflated bases completely reduced by setiger 50.
Inflated bases nearly spherical; narrow tips tapering. Posterior
ventral cirri short and tapering, blunt, emerging from posterior
parapodial faces, directed posteriorly and dorsally. Anterior
notopodial cirri basally slightly inflated, with 6 articulations.
Notopodial cirri increasing in length posteriorly, becoming
slightly longer than body width in last setigers, retaining at
least 2 articulations in all setigers.
Limbate setae narrow, marginally smooth. Pectinate setae
(Figure 891,p) narrow, tapering, flat. One marginal tooth longer
than other teeth, with -10 teeth. Shafts of anterior compound
falcigers (Figure 89k) inflated, marginally indistinctly serrated;
distal beaks present Appendages thick; heads small, bidentate.
Proximal teeth slightly shorter than distal teeth, thick,
triangular. Distal teeth slender, curved or bent. Guards
asymmetrically bluntly pointed; mucros absent Shafts of
posterior compound falcigers (Figure 89o) tapering, marginally
smooth; beaks absent Appendages distinctly tapering; heads
distinct Proximal teeth larger than distal teeth, narrowly
triangular, directed laterally. Distal teeth short, blunt, nearly
erect Guards symmetrically bluntly pointed, marginally
smooth; mucros absent Pseudocompound falcigers and compound
spinigers absent Aciculae at least paired, with dark
brown to black cores and clear sheaths, bluntly pointed, straight
or gently curved; cross-section round. Notopodial aciculae
slender, straw-colored to light brown. Subacicular hooks
(Figure 89q) with dark brown to black cores and clear sheaths,
bidentate. Hooks first present from setiger 34, present in all
setigers thereafter, single in most setigers, up to 3 hooks present
in some setigers. Proximal teeth very much larger than distal
teeth, directed laterally. Distal teeth nearly erect often nearly
missing.
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: 4,6,42.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice philocorallia is listed in Table 27 and
29. Of the species listed in Table 29, four have less than 10
branchial filaments where the branchiae are best developed;
these include E. microprion, E. philocorallia, E. plicata, and E.
tribranchiata. The peristomial cirri reach the prostomium in E.
microprion and E. philocorallia and do not outreach the
peristomium in the two other species. Posterior ventral cirri are
broadly attached, triangular in E. microprion and tapering from
a small base in E. philocorallia.
Eunice pinnata (Miiller, 1779)
Nereis pinnata Miiller, 1779:62-63, pi. 29: figs. 4-7.
Eunice pinnata.—Cuvier, 1817:525.—Audouin and Milne Edwards. 1833:219.
REMARKS.—This species, originally reported from an
ahermatypic coral reef, presumably in the Oslofjord, was not
characterized well enough by Miiller to allow identification
with any of the three species present at the Storskjaer reef in the
Oslofjord (i.e., E. norvegica, E. dubitata, and E. pennata). No
type specimens exist and the other authors cited limit
themselves to quoting Miiller's description. The species is here
considered indeterminable.
159. Eunice plicata Baird, 1869
FIGURE 90; TABLES 27, 29
Eunice plicata Baird, 1869:348-349.—Fauchald, 1986:253, figs. 51-55.
MATERIAL
EXAMINED.—Holotype, BM(NH) ZH