A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 211
Limbate setae marginally smooth. Pectinate setae flaring,
flat Both marginal teeth distinctly longer than other teeth; -15
teeth present. Appendages of compound falcigers tapering,
tridentate. Distal tooth well developed. Guards symmetrically
rounded; mucros absent. Pseudocompound falcigers and
compound spinigers absent. Aciculae, presumably yellow or
light-colored, distally gently double-curved, tapering to blunt
tips; cross-sections round. Subacicular hooks tridentate with
teeth in a crest. Starting segment for subacicular hooks not
mentioned. Fangs decreasing evenly in size from large main
fang to small tertiary fangs.
UNKNOWN MORPHOLOGICAL FEATURES.—Many features
from all parts of the body.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: None known. Unknown
Characters: 3-20, 23, 25, 26, 28, 32, 39, 40, 43-51,
55, 56, 58-63, 80-82.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice margariticacea is incompletely known,
and without access to material from the type locality, it cannot
be adequately characterized; it is, however, sufficiently well
characterized that it can be compared with other species in the
group in Tables 46 and 47.
117. Eunice marovoi Gibbs, 1971
FIGURE 70a-f; TABLES 7,41, 45
Eunice marovoi Gibbs, 1971:158-160, figs. lOa-h.
MATERIAL EXAMINED.—Holotype, BM(NH) ZB 1970.42,
Solomon Islands, sta ML 96, Marovo Lagoon, Vangunu Island,
dredged, 9 m, sand, 28 Oct 1965, coll. Royal Society
Expedition to Solomon Islands. Nine paratypes, BM(NH) ZB
1970.46, Solomon Islands, sta ML 110, Koto Lagoon,
Vangunu Island, 26 m, mud, 28 Oct 1965, coll. Royal Society
Expedition to Solomon Islands. One paratype, BM(NH) ZB
1970.49, Solomon Islands, sta ML 218, Tokavai Lagoon, New
Georgia, dredged, 18 m, mud, 8 Nov 1965, coll. Royal Society
Expedition to Solomon Islands.
COMMENTS ON MATERIAL EXAMINED.—The description is
based on the holotype and a single paratype from ZB 1970.46.
The variability is indicated in Table 7.
DESCRIPTION.—Holotype complete with 65 setigers; total
length 14.5 mm; maximal width 1 mm wide; length through
setiger 10, 2.5 mm.
Prostomium (Figure 70a) distinctly shorter and narrower
than peristomium, as deep as V2 of peristomium. Prostomial
lobes frontally rounded, dorsally slightly inflated; median
sulcus represented by very shallow frontal notch; ventral side
deeply furrowed. Eyes between bases of A-I and A-II, black;
posterior ! A of eyes overlapped by peristomial fold. Antennae
in a horseshoe, evenly spaced, similar in thickness. Ceratophores
ring-shaped in all antennae, without articulations.
Ceratostyles slender and tapering, without articulations. A-I to
setiger 1; A-II to setiger 2; A-I 11 to setiger 3. Peristomium
cylindrical. Separation between peristomial rings distinct on all
sides of body; anterior ring about twice as long as posterior
ring. Peristomial cirri about as long as A-I, to middle of
peristomium, digitiform, without articulations.
Maxillary formula 1+1, 4-6+10-13, 10-13+0, 10-13+10-
13, according to Gibbs. Left Mx II with large fang; such fang
absent on right side.
Branchiae (Figure 70f) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 3 to setiger 17-22. Branchiae terminating
well before posterior end, present on less than 55% of total
number of setigers. First branchia with 2 or more usually 3
filaments, maximum 6 filaments. Only last branchia single
filaments.
Neuropodial acicular lobes distally obliquely rounded with
high side superiorly; aciculae emerging above midline. All
pre- and postsetal lobes low, transverse folds. First 2 ventral
cirri bluntly tapering. Bases of ventral cirri inflated from
beginning of branchial region. Inflated bases about V2 of cirral
length, ovate; narrow tips digitiform. Basal inflation less
distinct in postbranchial region, but even in last setigers
present, glandular bases of ventral cirri slightly thicker than the
remainder of the cirri, distinctly set off from tips. Prebranchial
notopodial cirri increasing in length, tapering. Notopodial cirri
of branchial region long, tapering, with embedded aciculae
basally. Postbranchial notopodial cirri decreasing in length,
becoming slender and digitiform in posterior setigers. Notopodial
cirri located on dorsal body wall well above bases of
acicular lobes in posterior setigers. Notopodial cirri without
articulations.
Limbate setae slender, marginally smooth. Pectinate setae
not seen. Compound falcigers (Figure 70d,e) slender. Shafts
distinctly inflated, marginally serrated. Appendages narrow,
tapering to tips, bidentate. Proximal teeth triangular, directed
laterally. Distal teeth very nearly erect. Guards tapering to
distinct, slender mucros. Guards of posterior hooks (Figure
70d) distally rounded with very small, narrow mucros.
Pseudocompound falcigers and compound spinigers absent.
Aciculae yellow; anterior aciculae tapering to sharp tips;
postbranchial aciculae distally blunt and slightly bent dorsally;
cross-sections round. Separation between core and sheath
indistinct in both aciculae and subacicular hooks. Subacicular
hooks (Figure 70c) yellow, tridentate with teeth in a crest.
Hooks first present from setiger 17-19, present in all setigers
thereafter; 3 hooks present in most setigers. Hooks strongly
curved with large heads. Main fangs large; secondary fangs
much smaller; tertiary fangs very small and appended to back
of secondary fangs.
UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium and
anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—None.