A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 267
These two species are very similar; branchiae have single
filaments in the first 10 setigers in E. aciculata and only in two
to three setigers in E. perrieri; in addition, the latter has twice
as many (10) branchial filaments where the branchiae are best
developed as the former.
157. Eunice petersi, new name
FIGURE 89a-i; TABLES 33,35
Eunice punclala Peters. 1854:611.—Ehlers, 1897:166.
MATERIAL EXAMINED.—Holotype, ZMB 44, Mozambique,
2 slides marked type, BM(NH) ZB 1984.71 and 72.
COMMENTS ON MATERIAL EXAMINED.—The holotype is
now in three pieces.
DESCRIPTION.—Holotype complete with 302 setigers; total
length 130 mm; maximal width 5 mm; length through setiger
10, 7 mm. Body cylindrical; segments short and crowded
throughout.
Prostomium (Figure 89a) distinctly shorter than peristomium,
about as wide as pcristomium, as deep as l /i of
peristomium. Prostomial lobes frontally rounded, dorsally
inflated; median sulcus deep. Eyes behind bases of A-I, faded,
covered by pcristomial fold. Antennae in a straight line, evenly
spaced, similar in thickness. Ceratophores long in all antennae,
without articulations. Ceratostyles digitiform, tapering slightly,
with 2 to 3 indistinctly marked cylindrical articulations. A-I
and A-II to setiger 1; A-III to setiger 3. Peristomium
cylindrical; lower lip muscular. Separation between rings
distinct on all sides; anterior ring 3 A of total peristomial length.
Peristomial cirri to frontal edge of peristomium, digitiform,
with 3 cylindrical articulations.
Jaws not examined.
Branchiae present, pectinate, distinctly longer than notopodial
cirri, not reduced in mid-body region, erect. Branchiae
from setiger 13 to setiger 200; occurrence of branchiae sporadic
posterior to setiger 100. Branchiae present to near posterior
end, present on more than 65% of total number of setigers.
Where best developed branchiae with 4 short, thick filaments
on short, truncate branchial stems. Posterior to setiger 70 most
branchiae single, short, truncate filaments.
All neuropodial acicular lobes (Figure 89e) wide, rounded;
aciculae emerging at midline. All presetal lobes low, transverse
folds. Anterior and median postsetal lobes free, rounded.
Posterior to setiger 100 postsetal lobes follow outline of
acicular lobes closely. First 4 ventral cirri thick, tapering.
Ventral cirri basally inflated from setiger 5. Inflated bases
thick, ventrolateral ridges between setigers 6 and setiger 75;
narrow tips short and button-shaped. Posterior ventral cirri
slender and tapering. All notopodial cirri basally slightly
inflated, tapering to slender tips. Anterior and median
notopodial cirri with 2 articulations; posterior notopodial cirri
without articulations.
Limbate setae slender, marginally smooth. Pectinate setae
(Figure 89d,i) tapering, flat. One marginal tooth longer than
other teeth; -12 teeth present Shafts of compound falcigers
(Figure 89b,h) distinctly inflated, marginally serrated or
smooth. Appendages short; heads very large, bidentate.
Proximal teeth longer than distal teeth, triangular, directed
laterally. Distal teeth curved, tapering. Guards symmetrically
rounded, marginally smooth; mucros absent. Pseudocompound
falcigers and compound spinigers absent. Aciculae (Figure 89f)
single, with brown cores and clear sheaths, tapering, slender,
straight; cross-section round. Subacicular hooks (Figure 89c,g)
with brown cores and clear sheaths, bidentate. Hooks first
present from setiger 26, present in all setigers thereafter, always
single (except for replacements). Hooks tapering, slender, with
small heads. Proximal teeth larger than distal teeth, tapering,
laterally directed. Distal teeth slender, directed obliquely
distally.
UNKNOWN MORPHOLOGICAL FEATURES.—Jaw structure;
pygidium and anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Characters: 4,6, 39,42.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—The slides in BM(NH) are numbered 71 and 72.
Slide 71 contains a median parapodium showing dark brown
aciculae, compound hooks with both teeth well developed, and
blunt, rounded guards, and slender limbate setae and groups of
narrow pectinate setae without distinctly long marginal teeth.
Number of teeth in each pectinate seta appears to be about 15.
Subacicular hook tapers towards the tip and the proximal tooth
is at nearly right angles with the shaft and about twice the size
of the distal tooth. Aciculae are conical and abruptly tapered.
Slide 72 contains two very similar neuropodia. Branchiae are
not visible on either slide.
Eunice petersi is listed with similar species in Tables 33 and
35. Perhaps most characteristic is the scattered distribution of
branchiae over the posterior half of the body. It is one of two
species in Table 35 with notopodial cirri articulated in the
anterior end; the other species is E. fauveli. The latter has
mucronate compound falcigers; E. petersi has distally rounded
guards on the compound falcigers.
A new name is necessary, because the specific name
punctata was pre-occupied in combination Eunice punctata
(Risso, 1826).
The name honors the scientist responsible for describing a
very valuable, early collection from Mozambique.
158. Eunice philocorallia Buchanan, 1893
FIGURE 89j-q; TABLES 27,29
Eunice philocorallia Buchanan, 1893:173-176, pi. 9: figs. 2-6, pi. 10: figs.
7-9, pi. 11.