A Review of the Genus Eunice - Smithsonian Institution Libraries

42 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
prostomium, without articulations. Ceratostyles short, thick,
digitiform; all similar in thickness and shape; wrinkled, but
without articulations. A-I to middle of first peristomial ring;
A-II to front edge of second peristomial ring; A-III incomplete.
Peristomium cylindrical. Separation between rings distinct
dorsally and ventrally; anterior ring ~ 3 A of total peristomial
length. Peristomial cirri to middle of first peristomial ring,
nearly ovate, without distinct articulations.
Jaws not available for examination.
Branchiae present, pectinate, distinctly longer than notopodial
cirri (Figure 3e), not reduced in mid-body region, erect.
Branchiae from setiger 18 to setiger 190. Branchiae present to
near posterior end, present on more than 65% of total number
of setigers. First and last 10 branchiae single filaments.
Maximum number of filaments 5, reached at setiger 32; number
of filaments decreasing slowly over next 100 segments.
Posterior to setiger 150,2 filaments in each branchia (except in
last 10). Branchial stems tapering, longer than filaments.
Filaments digitiform, about as long as notopodial cirri.
Neuropodial acicular lobes distally rounded with aciculac
emerging dorsal to midline. Presetal lobes low transverse folds.
First 20 postsetal lobes free, triangular, projecting barely
beyond acicular lobes. Median and posterior postsetal lobes
folds following outline of acicular lobes. Ventral cirri thick and
tapering from wide bases in first 15-20 setigers. Median
ventral cirri basally inflated; basal inflated region indistinct,
ovate, noticeable in setigers 20-50; digitiform free tips present.
Posterior ventral cirri without basal inflation, digitiform.
Notopodial cirri thick and digitiform in anterior setigers, slowly
reduced in thickness, but retaining similar shape in all setigers,
without articulations.
Slender, marginally smooth limbate setae projecting beyond
compound falcigers in all setigers. All pectinate setae (Figure
3c) flat, distally flaring, with slender, cylindrical shafts; one
marginal tooth distinctly longer and thicker than all other teeth;
a total of about 15 teeth present. Shafts of compound falcigers
(Figure 3b) slender, distally distinctly inflated with distinct
distal beaks, marginally finely and indistinctly serrated, with
internal oblique striations. Appendages tapering towards
distinct head, bidentate. Proximal teeth triangular and directed
laterally, as large as distal tooth; distal teeth tapering, directed
laterally. Guards distally symmetrically rounded, cutting edge
finely serrated, without mucro. Pseudocompound falcigers and
compound spinigers absent. Neuropodial aciculae dark brown,
distally blunt, geniculate. Separation of acicular cores and
sheaths indistinct. Cross-section of aciculae round. Notopodial
aciculae clear, slender. Subacicular hooks (Figure 3d) dark
brown, bidentate. Separation of cores and sheaths indistinct.
Hooks first present from setiger 22, present in all setigers
thereafter, always single (except for replacements). Hooks
distally obliquely tapering; both teeth directed distally;
proximal teeth larger than distal teeth.
UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium and
anal cirri; jaw structure.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
Mx III forming arc with left Mx IV; Mx VI absent.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Characters: None.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice aciculata was referred to E. afra by
Hartman (1956). The species is a member of group B-4 as the
species groups were defined by Fauchald (1970) and is listed
with similar species in Tables 33 and 37-39. Among the
species in this group, only five have 10 or more anterior
branchiated setigers with single filaments only. These species
include E. denticulata, E. guanica, E. lita, and E. tenuis, in
addition to E. aciculata. Of these species, E. aciculata and E.
denticulata have long, more or less cylindrical ceratophores;
the other three have short, ring-shaped ceratophores. Branchiae
are first present from setiger 22 in E. aciculata. from setigers
18-19 in E. denticulata, from setigcr 36 in E. guanica, from
setiger 23 in E. lita, and from setigcr 124 in E. tenuis. The
posterior half of the body is abranchiate in E. lita, the other
species are branchiated (as far as known) to the posterior end.
Treadwell (1922:144) also reported that he had seen
specimens from Samoa and Hawaii.
Eunice adriatica Schmarda, 1861
Eunice adriatica Schmarda, 1861:124-125, 12 figs., pi. 32: fig.257.
REMARKS.—No material is available; the species was
referred to Palola siciliensis by Grube (1864:79 and 1867:68,
see also Ehlers, 1868:358). Nothing in Schmarda's description
and illustrations argue against this conclusion and the
synonymy is here accepted.
2. Eunice aedificatrix (Monro, 1933)
FIGURE 4; TABLES 1, 46,49
Eunice antennata aedificalrix Monro, 1933:60-61.
MATERIAL EXAMINED.—Six syntypes, BM(NH) ZK 1932
12.4.537-548, Balboa, Panama, coll. Crossland, St. George
Panama and Galapagos Expedition, 1924.
COMMENTS ON MATERIAL EXAMINED.—Monro (1933:60)
gave the following locality data: "Balboa, rocks and rock pools,
low tide at Panama (3); and from scrapings off a buoy at canal
entrance (3); and from piles of quays (5)." Based on the
information on the labels it cannot be determined which of
these samples were combined to give the six syntypes
examined.
DESCRIPTION.—Syntype complete, of unknown sex, with
270 setigers; total length 128 mm; maximal width 4 mm at
setiger 10; length through setiger 10, 7 mm. Anterior body
cylindrical, becoming dorsoventrally flattened in midbody,
tapering abruptly frontally and slowly towards posterior end,