A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 277
Peristomial cirri to posterior end of anterior peristomial ring,
digitiform, without articulations.
Jaws not examined.
Branchiae (Figure 92j) single filaments, present from setiger
15 to setiger 115. All branchiae distinctly longer than
notopodial cirri, strap-like, proximally flattened, nearly as long
as half body width in median and posterior setigers. Branchiae
present to near posterior end, present on more than 65% of total
number of setigers.
Median acicular lobes distally rounded with aciculae
emerging at midline. Pre- and postsetal lobes low, transverse
folds. Anterior ventral cirri thick, tapering, becoming basally
modestly inflated by setiger 10, retaining inflated bases through
most of body. Bases ovate or spherical; narrow tips tapering.
Far posterior ventral cirri tapering, rather slender. Prebranchial
notopodial cirri tapering, basally slightly inflated, becoming
digitiform in branchial region; all notopodial cirri short, rather
inconspicuous, without articulations.
Limbate setae slender, marginally smooth. Pectinate setae
(Figure 92k) flaring, flat. One marginal tooth distinctly longer
than other teeth, with -15 teeth. Anterior setigers with 2-3
pectinate setae; median and posterior setigers with up to 25
pectinate setae. Shafts of compound falcigers (Figure 921)
distally inflated, marginally smooth, with distinct distal beaks.
Appendages short, tapering, with rather large heads, bidentate.
Proximal teeth triangular, directed laterally. Distal teeth
distinctly shorter than proximal teeth, distinctly bent, distally
blunt Guards symmetrically rounded, marginally serrated;
mucros absent. Pseudocompound falcigers and compound
spinigers absent. Neuropodial aciculae single, light brown,
tapering to blunt, straight tips; cross-sections round. Subacicular
hooks (Figure 92f) light brown, bidentate. Hooks first
present from setiger 19, present in all setigers thereafter, always
single. Hooks tapering narrow heads. Teeth directed distally;
both teeth similar in size.
COMMENTS ON ADDITIONAL SPECIMEN EXAMINED.—
Antennae of small syntype short, without articulations.
Branchiae absent.
Shafts of compound falcigers (Figure 92h) inflated, marginally
smooth. Appendages very short. Guards symmetrically
rounded. Teeth slender. Proximal teeth longer than distal teeth,
narrowly tapering, directed laterally. Distal teeth tapering,
directed laterally. Subacicular hooks (Figure 92i) from about
setiger 25. Hooks with narrowed necks and distinct heads. Both
teeth directed distally and similar in size.
UNKNOWN MORPHOLOGICAL FEATURES.—Location of
maximum width and width at setiger 10. Condition of dorsal
edge of pygidium. Jaw structure.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
Mx III forming arc with left Mx IV; Mx VI absent.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 34, 39-42, 56, 58, 59.
Unknown Characters: 4, 6, 32, 33.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY —
None.
REMARKS.—Eunice anceps was first used in a list of
synonyms of E. afra with "Pruvot M.S." (Fauvel in Pruvot,
1930:69) as author. The name has never been used as a valid
name for the taxon and is thus not available as a name
according to the Code. The new name honors the person
responsible for recognizing the distinct status of the species, G.
Pruvot.
The larger of the two specimens belong to the same group of
species as E. afra and appears to be distinguishable from that
species. The features observable indicate that the smaller
specimen belongs to the same species as the larger one, but
some features crucial for species identification are missing and
the association between the two specimens is by no means
certain. The species, as defined by the large syntype, is
compared to other species in group B-4 in Tables 33 and 36.
Eunice pruvoti is the only species listed in Table 36 with
exclusively single branchial filaments.
163. Eunice pulvinopalpata Fauchald, 1982
FIGURE 93; TABLES 27, 31
Eunice pulvinopalpata Fauchald, 1982b:781-785, fig. la-f.
MATERIAL EXAMINED.—Holotype and paratype, USNM
74304 and 74305, Pacific Ocean off western Mexico, 20°50'N,
109°06'W, 2633 m, Alvin dive 1214, sample #7, 20 Apr 1982,
at base of white smoker. (Other paratypes in BM(NH) and
AHF).
DESCRIPTION.—Holotype incomplete with 348 setigers;
length 450 mm long; maximal width 11 mm; length through
setiger 10, 23 mm. Paratype examined complete with 353
setigers; total length 320 mm with posterior end in regeneration;
maximal width 11 mm; length through setiger 10,18 mm.
Body anteriorly cylindrical, becoming ventrally flattened by
setiger 100, retaining strongly convex dorsum in all setigers.
Body tapering abruptly anteriorly and slowly posteriorly; even
in last setigers body 6 mm wide.
Prostomium (Figure 93a) distinctly shorter and narrower
than peristomium, as deep as x li of the peristomium. Prostomial
lobes frontally rounded, dorsally excavate with a thickened
rim; median sulcus deep. Peristomial fold deep. Eyes not
observed. Antennae in a horseshoe, evenly spaced, similar in
thickness. Ceratophores ring-shaped in all antennae, without
articulations. Ceratostyles slender and tapering, with up to 19
irregularly cylindrical articulations in A-III. A-I to posterior
peristomial ring; A-I I and A-III to setiger 2. Peristomium
tapering anteriorly, with a distinct muscular lower lip.
Separation between rings distinct dorsally and ventrally;
anterior ring 3 A of total peristomial length. Peristomial cirri to
middle or front edge of prostomium, slender and tapering, with
-12 irregular, cylindrical articulations.
Maxillary formula (examined in USNM 74305) 1+1, 17+17,