A Review of the Genus Eunice - Smithsonian Institution Libraries

260
SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
filaments. Branchial stems long and slender, increasingly
flexible in posterior setigers. Filaments digitiform, longer than
notopodial cirri.
Neuropodial acicular lobes distally rounded, becoming
broadly transverse in last setigers present; aciculae emerging at
midlinc. Pre- and postsetal lobes low folds following outline of
acicular lobes closely. First 3 ventral cirri tapering; ventral cirri
moderately basally inflated in rest of segments. Bases ovate;
narrow tips digitiform. Notopodial cirri basally inflated,
articulated. Anterior notopodial cirri with up to 6 closely
spaced articulations; number of articulations decreasing to 3 in
last setigers present
Limbate setae slender, marginally smooth-edged. Pectinate
setae (Figure 86d) flaring, flat. One marginal tooth slightly
longer than all other teeth; -15 teeth present. Shafts of
compound falcigers (Figure 86e) tapering, marginally smooth.
Appendages slender, bidentate. Proximal teeth shorter than
distal teeth, tapering, directed distally. Distal teeth distinctly
thicker than proximal teeth, curved. Guards asymmetrically
bluntly pointed; mucros absent Pseudocompound falcigers and
compound spinigers absent. Aciculae yellow, narrow, tapering,
straight or gently curved; cross-sections round. Separation
between cores and sheaths indistinct in both aciculae and
subacicular hooks. Subacicular hooks (Figure 86c) yellow,
bidentate. Hooks first present from setiger 41, present in all
setigers thereafter, always single (except for replacements).
Hooks wide-shafted. Proximal teeth larger than distal teeth,
directed laterally. Distal teeth thick, truncate.
UNKNOWN MORPHOLOGICAL FEATURES.—All characters of
posterior setigers; pygidium and anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56. Unknown Characters:
1,2,4,6, 36-38,40,42,47, 50, 57-60,63.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,2;
38,2.
REMARKS.—Eunice pectinata differs distinctly from E.
pennata despite Grube's initial impression (see above) and is
listed with similar species in Tables 19 and 20. Among other
differences, all notopodial cirri are articulated in E. pectinata
and are articulated only in anterior setigers in E. pennata.
Additionally, the guards of the compound falcigers are distally
blunt in E. pectinata and distally sharply pointed in E. pennata.
151. Eunice pelamidis Quatrefages, 1866
FIGURE 86f-m; TABLES 52,53
Eunice pelamidis Quatrefages, 1866:322-323.
MATERIAL EXAMINED.—Holotype, MNHN, Paris, A.1(R.)-
1868-no. 57a, Payta, Peru, coll. Gaudichaud.
COMMENTS ON MATERIAL EXAMINED.—The holotype is in
two pieces and is extremely poorly preserved; total length was
not measured. It has been dissected for the jaw apparatus and no
meaningful illustrations of the anterior end is possible.
DESCRIPTION.—Holotype complete with 221 setigers. Anterior
end with 113 setigers; length approximately 100 mm;
maximal width 12 mm; length through setiger 10, 20 mm.
Prostomial lobes frontally obliquely truncate, dorsally
flattened, tapering ventrally from posterior edge, median sulcus
shallow. Eyes behind bases of A-I, dark. Ceratophores
ring-shaped in all antennae, without articulations. Ccratostyles
tapering smoothly; up to 21 moniliform articulations in A-III.
A-I to middle of anterior peristomial ring; A-I I and A-III to
posterior edge of anterior peristomial ring. Peristomial rings
distinct ventrally and in part dorsally; anterior ring 3 A of total
peristomial length. Peristomial cirri to middle of anterior
peristomial ring, tapering, with 4 or 5 articulations.
Maxillary formula 1+1, 5+5, 6+0, 5+8, 2+2. Mx VI absent
Mx III long, located behind left Mx II.
Branchiae (Figure 86m) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 3 to setiger 220. Branchiae present to
near posterior end, present on more than 65% of total number
of setigers. All branchiae strongly pectinate; maximum 24
long, slender filaments at about setiger 20.
Anterior neuropodial acicular lobes distally rounded, becoming
triangular in median and posterior setigcrs; aciculae
emerging at midlinc. All pre- and postsetal lobes low,
transverse folds. All ventral cirri basically tapering and thick.
Ventral cirri very indistinctly inflated basally from about
setiger 10 through setiger 25. Inflated bases ovate; narrow tips
tapering. Posterior ventral cirri tapering. All notopodial cirri
basally slightly inflated, tapering to thick, blunt tips, with 2 to
4 cylindrical, often indistinct articulations.
Limbate setae marginally serrated or frayed. Shafts of
anterior pectinate setae (Figure 861) thick; blade forming
scoops at end of setae. Both marginal teeth slightly thicker and
longer than other teeth; -10 teeth present. Shafts of median and
posterior pectinate setae (Figure 86j) wide and flat; blades flat,
flaring. Marginal teeth about as long as other teeth; -15 teeth
present. True compound falcigers (Figure 86k) in anterior
setigers only; joints increasingly indistinct posteriorly; by
setiger 50 no truly jointed setae present. Shafts of compound
falcigers tapering. Appendages very short, stout, bidentate.
Proximal teeth shorter than distal teeth, directed distally. Distal
teeth tapering, directed distally. Guards not seen. Pseudocompound
falcigers (Figure 86h,i) in posterior end distally evenly
furcate, rather than bifid; reduced joint sometimes visible only
as slight thickenings along 1 side with some faint lines running
obliquely across setae, sometimes more distinct with fused
appendages at distinct angle to shafts. Pseudocompound
falcigers amber-colored, very nearly as large as subacicular
hooks in posteriormost setigers. Compound spinigers absent
Aciculae usually paired, amber-colored to brown, tapering to
blunt tips (Figure 86g), distally geniculate or distinctly curved;
cross-section round. Subacicular hooks (Figure 86f) amber-