A Review of the Genus Eunice - Smithsonian Institution Libraries

250 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
of A-I. Antennae in a horseshoe, with A-III isolated by a gap,
with A-III slimmer than other 4. Ceratophores ring-shaped in
all antennae, without articulations. Ceratostyles medially
inflated; articulations nearly moniliform; maximum 16 articulations
in A-II and A-III. A-I to middle of anterior peristomial
ring; A-II and A-III to setiger 1. Peristomium cylindrical.
Separation between rings distinct dorsally and ventrally;
anterior ring ~ 4 /5 of total peristomial length. Peristomial cirri to
front edge of peristomium, slender and tapering, with 5
articulations.
Maxillary formula 1+1, 5+6, 8+0,4+7, and 1+1.
Branchiae (Figure 82h) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 5 to end of fragment. First branchia
single filaments; all others pectinate; maximum number of
filaments 8 at about setiger 15. Number of filaments decreasing
to 3 by setiger 35; this number maintained to last segment
present (Figure 82i).
All neuropodial acicular lobes distally transverse aciculae
emerging at midline. Pre- and postsetal lobes low, transverse
folds. First 3 ventral cirri thick, tapering. From setiger 4 ventral
cirri basally inflated. Inflated bases very large, bag-like,
glandular; narrow tips first digitiform, later short and buttonshaped.
Notopodial cirri basally inflated, tapering to blunt tips,
with 2 to 4 distinct, cylindrical articulations.
Limbate setae with narrow limbation, marginally serrated.
Pectinate setae (Figure 82k) tapering, flat. Marginal teeth no
larger than other teeth, -12 teeth present. Shafts of compound
falcigers (Figure 82g) distally inflated, marginally serrated.
Appendages short; head small, bidentate. Proximal teeth very
much smaller than distal teeth, forming a slight triangular
elevation on side of appendage. Distal teeth tapering, nearly
erect. Guards asymmetrically bluntly pointed, marginally
distinctly serrated; mucros absent. Pseudocompound falcigers
and compound spinigers absent. Most aciculae broken; those
present yellow, bluntly and weakly hammer-headed (Figure
821); cross-section round. Separation of cores and sheaths
indistinct in both aciculae and subacicular hooks. Subacicular
hooks (Figure 82j) yellow, tridentate with teeth in a cresL
Hooks first present from setiger 27, present in all setigers
thereafter, always single (except for replacements). Hooks with
teeth decreasing evenly in size from large proximal fang.
UNKNOWN MORPHOLOGICAL FEATURES.—Relationship between
Mx III and left Mx IV; various setal features; 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, 36-38,40,47, 50, 57-60, 63.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,1;
38,1.
REMARKS.—Eunice panamena was considered a member of
group A-5 on the strength of Chamberlin's (1919a:260)
specific statement that the subacicular hooks should be
bidentate; they are however tridentate. The species is listed in
Tables 46 and 48. It has A-II and A-III similar in length as does
E. stigmatura also listed in Table 48. However, the separation
between the anterior and posterior peristomial rings is distinct
dorsally and ventrally only in E. panamena: the separation is
distinct also laterally in E. stigmatura.
145. Eunice papeetensis (Chamberlin, 1919)
FIGURE 83a-f; TABLES 41.44
Uodice oliga papeetensis Chamberlin. 1919a:248-249. pi. 55: Tigs. 8-10, pi.
56: fig. 1.
MATERIAL EXAMINED.—Holotype, USNM 19397, Papeete,
Tahiti, intertidal, 9 Nov 1899, Albatross.
DESCRIPTION.—Holotype incomplete with 37 setigers;
length 8.5 mm; maximal width 2 mm; length through setiger
10, 2.5 mm.
Prostomium (Figure 83f) distinctly shorter and narrower
than peristomium, less than '/2 as deep as peristomium.
Prostomial lobes frontally rounded, dorsally excavate with a
thickened rim; median sulcus shallow. Eyes behind bases of
A-I, dark. Antennae in a horseshoe, with A-III isolated by a
gap, similar in thickness. Ccratophores ring-shaped in all
antennae, without articulations. Ceratostyles tapering, with up
to 20 moniliform articulations in A-III. A-I to posterior edge of
peristomium; A-II to setiger 8; A-III to setiger 9. Peristomium
cylindrical. Separation between rings distinct ventrally and
dorsally. Anterior ring 5 /6 of total peristomial length. Peristomial
cirri to frontal edge of peristomium, slender, with 6
articulations.
Maxillary formula 1+1,6+7,8+0,7+10, and 1+1. Mx III part
of distal arc with left Mx IV.
Branchiae present, palmate, not reduced in mid-body region.
Branchiae from setiger 6 to setiger 30 on one side and 33 on
other side. Branchiae terminating well before posterior end,
present on less than 55% of total number of setigers. First 2 and
last 5 pairs single filaments; all other branchiae with 2 or
maximally 3 filaments.
Anterior neuropodia distally truncate; median acicular lobes
rounded; aciculae emerging at midline. Pre- and postsetal lobes
low, transverse folds. First 3 ventral cirri thick, tapering.
Ventral cirri basally inflated from setiger 4. Inflated bases
ovate; narrow tips tapering. Notopodial cirri long, basally
inflated. Anterior notopodial cirri with about 5 articulations,
with 3 or 4 articulations in posteriormost segments.
Pectinate setae (Figure 83a) small, flaring, flat. One marginal
tooth distinctly longer than other, with -10 teeth present. Shafts
of compound falcigers (Figure 83d) distally inflated, marginally
serrated. Appendages rather large; head distinct, bidentate.
Both teeth well developed, directed laterally. Guards asymmetrically
bluntly pointed; mucros absent. Pseudocompound
falcigers and compound spinigers absent. Aciculae at least