A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 153
complete specimen). Aciculae were black and the maxillary
formula was given as 1+1, 6+5, 8+0,4+7, and 1+1.
No locality information was available. The species appears
to belong to group B-2, or possibly group B-l. Without access
to the type it cannot be further characterized and is here
considered indeterminable.
74. Eunice gagzoi Augener, 1922
Eunice gagzoi Augener, 1922b:45.
FIGURE 50a-h; TABLES 33,37
MATERIAL EXAMINED.—Lectotype ZMH V-9755, paralectotype,
ZMH V-6812, St Thomas, coll. KrOyer and Orsted (part
of original material of Eunice cariboea Grube, 1856);
paralectotype, ZMB 6286, St. Thomas, coll. Kukenthal and
Hartmeyer.
COMMENTS ON MATERIAL EXAMINED.—The lectotype has
been frontally dissected and the jaws are now missing as are
several parapodia along the body.
DESCRIPTION.—Lectotype complete, of unknown sex, with
160 setigers; total length 32.5 mm; maximal width 1.5 mm at
setiger 10; length through setiger 10, 2.75 mm. ZMH
paralectotype complete, of unknown sex, with 105 setigers.
ZMB paralectotype incomplete, of unknown sex, with 167
setigers.
Prostomium (Figure 50a) distinctly shorter than peristomium,
about as wide as peristomium, as deep as l /2 of the
peristomium. Prostomial lobes frontally rounded, dorsally
flattened, tapering from junction to peristomium; median
sulcus distinct ventrally and marked as shallow notch frontally,
invisible dorsally. Eyes between bases of A-I and A-II.
Antennae in shallow horseshoe, evenly spaced, similar in
thickness. Ceratophores ring-shaped in all antennae, without
articulations. Ceratostyles digitiform, without articulations. A-I
to middle of anterior peristomial ring; A-II and A-I 11 to setiger
1. Peristomium tapering anteriorly, with distinct muscular
lower lip. Separation between rings distinct on all sides;
anterior ring ~ 2 /3 of total peristomial length. Peristomial cirri to
middle of anterior peristomial ring, without articulations.
Maxillary formula of ZMB paralectotype 1+1, 6+6, 6+0,
4+8, and 1+1. Mx III part of distal arc with left Mx IV. Mx VI
missing.
Branchiae (Figure 50g) present as single thick branchial
filaments from setiger 120 in lectotype, from setiger 85 in ZMH
paralectotype, and from setiger 115 in ZMB paralectotype.
Branchiae increasing in length posteriorly up to last 5 setigers,
about as long as body is wide where best developed, reduced
over last 5 setigers to short, indistinct buttons on last setigers
present. Branchiae present on less than 55% of the total number
of setigers.
Anterior neuropodial acicular lobes (Figure 500 asymmetrically
rounded, becoming symmetrically rounded in posterior
setigers; aciculae emerging at midline. Anterior presetal lobes
low, transverse folds, considerably shorter than acicular lobes,
increasing in relative length posteriorly and from about setiger
50 follow outline of acicular lobes closely. Anterior postsetal
lobes higher than acicular lobes, symmetrically rounded, by
setiger 25 postsetal lobes reduced to low folds following
outline of acicular lobes closely. Anterior ventral cirri thick and
tapering. Ventral cirri basally strongly inflated in setigers 10 to
about setiger 30. Inflated bases thick, transverse welts; narrow
tips tapering. Inflation rapidly reduced rapidly from setiger 30,
from about setiger 45 ventral cirri short, slender and digitiform.
Anterior notopodial cirri basally inflated, becoming shorter and
more slender in posterior setigers, but always longer than
ventral cirri, without articulations.
Limbate setae slender, marginally finely serrated. Pectinate
setae (Figure 50e) very large, tapering, flat. Both marginal teeth
longer than other teeth, -12 teeth present. Shafts of compound
falcigers (Figure 50c,d) inflated, marginally coarsely and
shallowly serrated. Appendages slender. Anterior appendages
(Figure 50c) with nearly parallel sides and large heads,
bidentate. Teeth similar in size. Proximal teeth tapering,
directed obliquely distally. Distal teeth curved, directed
obliquely distally. Guards asymmetrically bluntly pointed,
marginally serrated; mucros absent. Posterior appendages
(Figure 50d) tapering with small heads, bidentate. Proximal
teeth smaller than distal teeth, tapering, directed obliquely
distally. Distal teeth curved, directed obliquely distally. Guards
increasingly symmetrically rounded in posterior setigers,
marginally serrated; mucros absent. Pseudocompound falcigers
and compound spinigers absent. Aciculae (Figure 50b) single,
amber-colored, thick, abruptly tapering, distally bent. Subacicular
hooks (Figure 50h) amber-colored, bidentate. Hooks
first present from setiger 27-38, present in all setigers
thereafter, always single (except for replacements). Hooks with
distinctly inflated subdistal region and large, parrot-beak
shaped heads. Proximal teeth very large, strongly curved.
Distal teeth small, distinctly curved.
UNKNOWN MORPHOLOGICAL FEATURES.—Relationship between
Mx III and left Mx IV; pygidium and anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—Mx III short and forming part of distal arc with left
MxIV.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 22, 33, 34, 39-42, 56,
58, 59. Unknown Characters: 74, 78.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—This species was considered a junior synonym
of E. cariboea by Hartman (1959) and it certainly resembles
that species. The two species have, however, distinctly different
subacicular hooks, pectinate setae, and aciculae, in addition to
having differently shaped prostomia and peristomia. The
presence of distinct branchiae on E. gagzoi also clearly
separates the two species. Eunice gagzoi has been compared to
similar species in Tables 33 and 37. The very late start of the