A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 179
tween Mx III and left Mx IV; pygidium and anal cirri.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
Mx III long and located behind left Mx II.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 34, 56, 58, 59. Unknown
Characters: 1, 2,4, 6, 39, 40, 42,47, 50, 63.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice interrupta was named for the interrupted
branchial distribution in the holotype; this kind of
branchial distribution is also present in one paratype, but other
paratypes of sufficient length do not show this feature.
Consequently the species has been listed among species in
group C-l (Tables 40 and 44) and C-2 (Tables 46 and 47).
Non-type specimens identified by Treadwell include very
small, juvenile specimens and one larger incomplete specimen
in which the branchial distribution could not be determined.
Among species in group C-l with moniliform articulations in
the ceratostylcs, E. interrupta is the only one to have the
notopodial cirri articulated throughout the body. Only E.
interrupia and E. oliga, of all the species in group C-2 with all
notopodial cirri articulated, have as few as three branchial
filaments where the branchiae are best developed. In E.
interrupta the three median antennae are similar in length; in E.
oliga the median antenna is distinctly longer than the other four
antennae.
Treadwell designated only a single specimen as type; the rest
of the material here examined is part of his original material
and have here been designated as paralectotypes.
92. Eunice investigatoris Fauvel, 1932
TABLES 27,28
Eunice investigatoris Fauvel, 1932:137-138, fig. 19a-f.
DESCRIPTION.—The type of this species, described from 45
m depth in the Persian Gulf, is not available. The description is
sufficiently detailed to allow some comments.
Numbers of setigers not indicated. Specimen complete; total
length 110 mm; width 7 mm.
Antennae similar in thickness. Ceratophores ring-shaped in
all antennae, without articulations. Ceratostyles slender and
tapering, without articulations. A-I presumably to setiger 1-2;
A-II and A-I 11 to setiger 6 or 7.
Branchiae present, pectinate, distinctly longer than notopodial
cirri, reduced in mid-body region, erect. Branchiae from
setiger 6 to near posterior end, present on more than 65% of
total number of setigers. Maximum 18-20 filaments at about
setiger 14. Branchiae "reduced in size" in middle of body,
"increase very much" in posterior end. Branchiae in median
and especially posterior regions dichotomously or trichotomously
regularly branched.
Anterior ventral cirri tapering, becoming basally inflated in
early branchial setigers. Narrow tips tapering. Ventral cirri
without inflated bases in posterior half of body, increasingly
long and slender in far posterior setiger, up to twice as long as
neuropodial lobes. Notopodial cirri long in anterior setigers,
becoming shorter than branchiae in branchial region, without
articulations.
Pectinate setae with either 1 or both marginal teeth longer
than other teeth, with 8-10 teeth. Shafts of compound falcigers
inflated, marginally smooth. Appendages thick, tapering,
bidentate. Proximal teeth larger than distal teeth, triangular,
directed laterally. Distal teeth very short, slender, bent. Guards
symmetrically rounded; mucros absent. Pseudocompound
falcigers and compound spinigers absent. Aciculae black,
tapering, straight; cross-sections round. Subacicular hooks
black, bidentate. Hooks first present from setiger 44-45,
present in all setigers thereafter, always single (except for
replacements). Hooks with inflated median shafts; heads small.
Proximal teeth directed laterally. Distal teeth smaller than
proximal teeth, directed obliquely distally.
UNKNOWN MORPHOLOGICAL FEATURES.—Many features of
all parts of the body.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 22, 56, 58, 59. Unknown
Characters: 1, 4-16, 24-29, 36, 39, 40, 43-51, 54,
65-68, 74, 78.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice investigatoris is listed with similar
species in Tables 27 and 28; it is very unusual among species
with dark aciculae and subacicular hooks in that is has a
reduced number of branchial filaments in a mid-body region.
This characters state is other limited exclusive to species with
yellow, tridentate subacicular hooks. It was not included in the
key, because it is relatively poorly known.
Eunice jagori Grube, 1878a: 103.
93. Eunice jagori Grube, 1878
FIGURE 58g-j; TABLES 33,35
MATERIAL EXAMINED.—Holotype, ZMB F2003, Manila,
Philippines, coll. Semper.
DESCRIPTION.—Holotype incomplete, of unknown sex, with
58 setigers; length 30 mm; maximal width 6 mm near setiger
15; length through setiger 10, 6 mm. Body dorsoventrally
flattened; segments crowded with parapodia on lateral ridges,
especially in posteriormost setigers present.
Prostomium (Figure 58h) distinctly shorter than peristomium,
about as wide as peristomium, less than x li as deep as
peristomium. Prostomial lobes frontally rounded, dorsally
flattened; median sulcus deep. Eyes lateral to bases of A-II,
faded. Antennae in horseshoe; A-I distinctly isolated from A-II
and A-III, similar in thickness. Ceratophores ring-shaped in all