A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 327
appendages long, knife-like and marginally serrated. Aciculae
single, yellow, smoothly tapering, straight; cross-sections
round. Subacicular hooks (Figure lllh) dark yellow (honeycolored)
or amber, bidentate. Hooks first present from setiger
21, present in all setigers thereafter, always single (except for
replacements). Hooks about as thick as aciculae, gently curved
with distinct narrow necks and distinct heads. Proximal teeth
very much larger than distal teeth, strongly curved. Distal teeth
nearly erect.
UNKNOWN MORPHOLOGICAL FEATURES.—Jaw structure;
pygidium and anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—Mx III long and straight, located behind left Mx II.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 22, 33, 34, 39-42, 56,
60. Unknown Characters: 13, 14, 74, 78.
ASSUMED STATES FOR PURPOSE OF PREPARING
KEY.—
None.
REMARKS.—Eunice tubicola was considered a synonym of
E. tubifex by Hartman (1956). It is listed in Tables 52 and 53
with similar species. The only three species in Eunice with
compound spinigers are E. impexa, E. tubicola, and E. tubifex.
The first has distinctly articulated ceratostyles; the other two
have non-articulated ceratostyles. In E. tubicola the separation
between the peristomial rings is distinct both dorsally and
ventrally; in E. tubifex it is distinct dorsally only. Eunice
tubicola has very short antennae, barely outreaching the
prostomium; in E. tubifex the antennae are distinctly longer
than the prostomium with the three median antennae similar in
size.
195. Eunice tubifex Crossland, 1904
FIGURE 112; TABLES 52, 53
Eunice tubifex Crossland, 1904:303-310, figs. 52-55, pi. 21: figs. 1-8.
MATERIAL EXAMINED.—Lectotype and 2 paralectotypes,
BM(NH) ZK 1924.3.1.90/91, Wasin Harbour, S Kenya coast,
dredged, average depth 18 m, extensive Telesto cover.
Crossland Zanzibar and British East Africa collections,
1901-1902.
COMMENTS ON MATERIAL EXAMINED.—The specimens
examined are the three smaller specimens mentioned by
Crossland (1904:308) as differing in structure from the adult
specimens. The description is based on the two larger
specimens; some comments are made on the third small
specimen. Lectotype with jaws partially everted; paralectotype
with jaws fully everted.
DESCRIPTION.—Lectotype incomplete with 51 setigers;
length 37 mm; maximal width 3 mm at setiger 10; length
through setiger 10,7 mm. Large paralectotype incomplete with
52 setigers; length 36.5 mm; maximal width 2 mm; length
through setiger 10,7 mm. Anterior body inflated; median body
dorsoventrally flattened.
Prostomium (Figure 112a,i) distinctly shorter than peristomium,
about as wide as peristomium, as deep as V2 of the
peristomium or deeper. Prostomial lobes frontally rounded,
dorsally excavate with a flattened rim; median sulcus deep.
Black eyes between bases of A-I and A-II. Antennae in a
horseshoe; A-I 11 separated from A-I and A-II by distinct gap,
similar in thickness. Ceratophores ring-shaped in all antennae,
without articulations. Ceratostyles slender and digitiform
without articulations. A-I to middle of anterior peristomial ring;
A-II to setiger 4; A-III incomplete in lectotype, to setiger 4 in
paralectotype. Peristomium inflated anteriorly, massive, with
muscular lower lip. Separation between rings distinct dorsally;
2 transverse furrows present ventrally, separating ventrum in 3
equal parts. Anterior ring 4 /s of total peristomial length.
Peristomial cirri thick, to middle of anterior peristomial ring,
basally inflated, without articulations.
Maxillary formula of paralectotype 1+1,4+3, 7+0, 2+7, and
1+1; partial formula of lectotype 1+1,4+4,7+0,2+, and 1+1.
Mx VI absent; Mx III long, straight, located behind left Mx II.
Distal arc absent.
Branchiae (Figure 112d) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, flexible.
Branchiae from setiger 17 as single filaments; maximum 4
filaments by setiger 30; maximum number retained to posterior
end of fragments. Branchial stems shorter than notopodial cirri,
tapering, flexible. Filaments longer than notopodial cirri,
slender, filiform.
Neuropodial acicular lobes (Figure 112c,m) obliquely
truncate with distinct superior tab; aciculae supporting superior
tab. Presetal lobes low, transverse folds. Anterior postsetal
lobes free, projecting as far as acicular lobes, rounded. Median
postsetal lobes low, transverse folds. First 5 ventral cirri
tapering. Ventral cirri basally inflated from about setiger 6
through rest of fragments. Inflated bases thick, transverse
welts; narrow tips short and button-shaped. Prebranchial
notopodial cirri medially inflated, increasing in length through
setiger 10, thereafter retaining the same length through rest of
prebranchial region. Notopodial cirri of branchial region
increasingly shorter, becoming tapering. Notopodial cirri
without articulations.
Limbate setae longer than all other setae, narrow, marginally
smooth. Anterior and median pectinate setae (Figure 112fJ,r)
similar, furled, tapering. Shafts slender, cylindrical. Both
marginal teeth as long as other teeth, distinctly heavier. About
10 teeth present. Anterior parapodia with dense masses of
compound spinigers. Shafts of spinigers (Figure 112b,j)
slightly inflated, smooth, with distinct distal beaks. Appendages
slender, tapering, marginally smooth. Spinigers replaced
by compound falcigers from early branchial setigers. Shafts of
falcigers (Figure 112e) inflated, marginally smooth, without
distal beaks. Appendages longer than inflated end of shaft,
tapering. Heads distinct, bidentate. Proximal teeth longer than
distal teeth, narrowly tapering, directed laterally. Distal teeth
slender, tapering, distinctly bent Guards wide, distally
rounded, amucronate; margins smooth. Pseudocompound
falcigers absent Aciculae paired, thick, inferior aciculae black;