A Review of the Genus Eunice - Smithsonian Institution Libraries

60 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
is listed with similar species in Tables 46 and 47. Four species
in Table 47 have reduced branchiae in a median region. In
addition to E. antennata, this group includes E. margariticacea,
E. oliga, and E. lorresiensis. Eunice margariticacea has
tridentate appendages in the compound hooks; the other species
have bidentate appendages. Eunice oliga has very poorly
developed branchiae with a maximum of three filaments; the
two other species have seven filaments where the branchiae are
best developed. The ceratophores are long in E. torresiensis
and are short and ring-shaped in E. antennata. Other
differences can be seen by comparing the illustrations of the
two species.
Eunice antennata aedificatrix Monro, 1933
Eunice antennata aedificatrix Monro, 1933:60-61.
REMARKS.—Originally described as a subspecies, this
morph is here considered sufficiently different from E.
antennata to be treated as a distinct species.
Eunice antennata gracilis Grube, 1866
Eunice antennata gracilis Grube, 1866a:65.
REMARKS.—This "variety" is distinctly different from E.
antennata and is here treated separately as E. gracilis.
13. Eunice antillensis Ehlers, 1887
FIGURE 12; TABLES 19,20
Eunice antillensis Ehlers, 1887:84-85, pi. 24: figs. 5-7 [in part].
MATERIAL EXAMINED.—Lectotype, one syntype of E.
antillensis, MCZ 810, Blake sta 45, 25°23'N, 84°21'W, 185 m.
COMMENTS ON MATERIAL EXAMINED.—The original material
of E. antillensis consists of three specimens. The one
described here was illustrated by Ehlers (1887, pi. 24: fig. 6)
and is here selected as lectotype for the species; one incomplete
specimen consisting of -35 setigers and devoid of antennae,
branchiae, and all but the broken stubs of the setae; and one
complete specimen described below as a new species, E.
stanleyi.
DESCRIPTION.— Lectotype an incomplete female with 62
setigers; total length 30 mm; maximal width 3 mm; length
through setiger 10, 7 mm. Body thick, cylindrical, anteriorly
truncate.
Prostomium (Figure 12b) distinctly shorter and narrower
than peristomium, as deep as l /2 of the peristomium. Prostomial
lobes frontally truncate, dorsally flattened; median sulcus
shallow. Eyes outside bases of A-II, black, overlapped by
peristomial fold. Antennae in a deep horseshoe; A-I and II
emerging close together, separated by a distinct gap from A-I 11,
similar in thickness. Ceratophores ring-shaped in all antennae,
without articulations. Ceratostyles slender and tapering, with
up to 24 cylindrical, somewhat irregular articulations. A-I to
setiger 3; A-II to setigcr 10; A-I 11 to setiger 16. Peristomium
cylindrical. Separation between rings distinct dorsally, visible
ventrally; anterior ring ~ A /s of total peristomial length.
Peristomial cirri reaching well beyond prostomium, as long as
A-I, slender and digitiform, with 5 articulations.
Maxillary formula 1 + 1, 4+4, 6+0, 4+9, and 1 + 1.
Branchiae present, pectinate, distinctly shorter than notopodial
cirri (Figure 12c), not reduced in mid-body region, erect.
Branchiae from setiger 4 through setiger 36. Branchiae
terminating well before posterior end. First and last 2 pairs
single filaments, maximum 6 filaments. Stems tapering.
Filaments digitiform.
Median acicular lobes distally truncate with aciculae
emerging dorsal to midline. Prc- and posLsetal lobes low,
transverse folds. Ventral cirri without inflation in 3 anterior
setigers. Anterior ventral cirri very thick, tapering from narrow
bases. Median ventral cirri basally inflated. Bases ovale or
spherical; narrow lips tapering. Postbranchial ventral cirri
without basal inflations, tapering. Anterior noiopodial cirri
digitiform, with 4 or 5 articulations. In branchial region
notopodial cirri very long, tapering to long slender tips, with 3
or 4 indistinct articulations. Postbranchial notopodial cirri
(Figure 12a) considerably shorter than those in branchial
region, with 2 or 3 articulations.
Limbate setae slender, marginally serrated. Shafts of
pectinate setae (Figure 12g) wide, cylindrical. Blades tapering,
flat. Both marginal teeth longer than other teeth, with -12 teeth.
Shafts of compound falcigers (Figure 120 slightly inflated,
marginally indistinctly serrated, without distal beaks. Appendages
short, bidentate; teeth prominent. Proximal teeth very
much larger than distal teeth, tapering, directed basally. Distal
teeth tapering, hooked, rather than smoothly curved. Guards
symmetrically smoothly rounded, distinctly serrated basally,
without mucros. Pseudocompound falcigers and compound
spinigers absent. Aciculae paired, yellow; cross-section of shaft
round, distally flattened and expanded into rounded tabs
(Figure 12d). Subacicular hooks (Figure 12e) yellow, bidentate.
Hooks first present from setiger 33, present in all setigers
thereafter, paired in some setigers. Hooks tapering distally;
heads large. Proximal teeth very much larger than distal teeth,
slender, tapering, directed laterally. Distal teeth slender,
tapering, nearly erect.
UNKNOWN MORPHOLOGICAL FEATURES.—All features associated
with the posterior end, such as the shape of posterior
parapodial features, pygidium, and anal cirri; the shape of Mx
III and its relation to left Mx IV.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Characters: 1, 2, 4, 6, 38, 42, 67, 68.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice antillensis as here defined resembles E.