A Review of the Genus Eunice - Smithsonian Institution Libraries

284
SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
laticeps has distally cylindrical antennal articulations and
maximally about 18 branchial filaments; E. pycnobranchiata
has distally drop-shaped antennal articulations and maximally
four branchial filaments. The proposed synonyms cannot be
accepted.
Eunice quadrioculata Grube, 1856
Eunice quadrioculata Gnibe, 1856:60.
Marphysa quadrioculata.—Quatrefages, 1866:337.—Grube, 1878a: 101 -102.
REMARKS.—This species, of which Grube actually only saw
an illustration made by A.S. Orsted, has been considered a
member of the genus Marphysa because Quatrefages first
referred it to that genus.
166. Eunice quinquefida Moore, 1903
FIGURE 95g-n; TABLES 27,32
Eunice quinquefida Moore. 1903:435-437, pi. 25: figs. 39-41.
MATERIAL EXAMINED.—Holotype, USNM 15714, Albatross
sta 3698, Japan, Sagami Bay, 4.5 miles off Manazuru Zaki
(approximate position 35 o l(rN, 139°10'E),5 May 1900,280 m,
green mud, volcanic ash and sand, beamtrawl.
DESCRIPTION.—Holotype incomplete with 56 setigers;
length 45 mm; maximal width 2.5 mm; length through setiger
10, 8 mm. Body anteriorly cylindrical, becoming slightly
dorsoventrally flattened by setiger 25-30.
Prostomium (Figure 95g) distinctly shorter and narrower
than peristomium, less than x li as deep as peristomium.
Prostomial lobes frontally rounded, dorsally strongly inflated;
median sulcus deep. Eyes between bases of A-I and A-II, dark.
Antennae in a horseshoe, with A-I isolated by a gap, similar in
thickness. Ceratophores ring-shaped in all antennae, without
articulations. Ceratostyles slender and tapering, separated
irregularly into articulations; maximum 10 articulations present
in A-II. Articulations cylindrical basally drop-shaped distally,
especially in A-I. A-I to posterior peristomial ring; A-II to
setiger 4; A-III to setiger 3 (probably incomplete). Peristomium
slightly flaring anteriorly; lower lip distinct, muscular. Separation
between rings very distinct dorsally and ventrally,
indistinct only for a short distance laterally; anterior ring 5 /6 of
total peristomial length. Peristomial cirri to front edge of
peristomium, slender and tapering, with 3 cylindrical articulations.
Maxillary formula 1+1,6+6,8+0,8+10, and 1+1. Mx III part
of distal arc with left Mx IV. Teeth on Mx II slender and
sharply pointed; other teeth short and delicate.
Branchiae (Figure 95h,k) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 7 to end of fragment. All branchiae with
at least 2 filaments; maximum 5 filaments at setigers 15-20.
Branchial stems slender. Filaments slender, nearly filiform.
Filaments as long as notopodial cirri.
All neuropodial acicular lobes symmetrically conical;
aciculae emerging at midline. Presetal lobes obliquely truncate.
Postsctal lobes low, transverse fold. First 4 or 5 ventral cirri
thick, tapering. Ventral cirri strongly inflated basally from
setiger 6-7. Inflated bases nearly spherical in setigers 15-25,
changing to thick transverse welts from about setiger 26,
becoming gradually reduced from about setiger 30, missing
posterior to setiger 40. Narrow lips tapering in all ventral cirri
with inflated bases. Far posterior ventral cirri slender, tapering.
Notopodial cirri with distinct thickened cirrophorcs; cirrostyles
thick, tapering, without articulations.
Limbate setae marginally frayed. Anterior pectinate setae
(Figure 95j) tapering, fiat. One marginal tooth distinctly longer
than other teeth; 8-9 teeth present. Median and posterior
pectinate setae (Figure 951) distinctly furled, retaining same
shape and number of teeth. Shafts of compound falcigers
(Figure 95i) inflated, marginally finely serrated. Appendages
tapering, bidentatc. Proximal and distal teeth similar in size.
Proximal teeth short, truncate, directed laterally. Distal teeth
curved. Guards symmetrically sharply pointed, without
mucros. Pscudocompound falcigers and compound spinigers
absent. Aciculae single in anterior parapodia, paired elsewhere
(Figure 95n), with brown cores and clear sheaths, tapering,
sharply bent, sometimes in double curves; cross-section round.
Subacicular hooks (Figure 95m) with brown cores and clear
sheaths, bidentatc. Hooks first present from setiger 30, present
in all setigers thereafter, paired in most setigers. Hooks slender,
tapering, with small head. Proximal teeth larger than distal
teeth, triangular, laterally directed. Distal teeth short, erect
UNKNOWN MORPHOLOGICAL FEATURES.—All features associated
with 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, 58, 59. Unknown
Characters: 1, 2,4, 6, 23, 36-40,47, 50, 63.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,1;
38,1.
REMARKS.—Because of the incomplete condition of the type
of E. quinquefida, the species was listed in group B-5 by
Fauchald (1970). It resembles species in group B-2, and is here
compared to species in Tables 27 and 32. It is one of two
species in 32 without articulated notopodial cirri. The other
species, E. rubella, has very short antennae barely outreaching
the prostomium. Although A-III is probably incomplete in the
type of E. quinquefida, A-II reaches setiger 4.
Eunice quoya Quatrefages, 1866
Eunice quoya Quatrefages. 1866:318.—Fauchald. 1986:255.
REMARKS.—The original diagnosis of this species is
incomplete and no material is available. It was characterized as
indeterminable by Fauchald (1986) and no new evidence has
been come to light to change that opinion.