A Review of the Genus Eunice - Smithsonian Institution Libraries

54 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
with similar species in Table 27; it has not been included in the
key.
Eunice anceps Pruvot, 1930
Eunice anceps Pruvot, 1930:69.
Eunice afra.—Fauvel in Pruvot, 1930:69 [in part, not Eunice afra Peters, 1854].
REMARKS.—Eunice anceps was named in a list of synonyms
of E. afra in a paper written by Pruvot, a paper that Fauvel
edited and issued after Pruvot's death. Pruvot was named as the
author of the species. The epithet has never been used as a valid
name for the taxon and is thus not available as a name. The
species is described below as E. pruvoti; the new name honors
the original author of the species, G. Pruvot.
10. Eunice annulicornis Johnston, 1865
FIGURE 9; TABLE 27
Eunice annulicornis Johnston, 1865:131-132.—Baird in Johnston, 1865:340.
MATERIAL EXAMINED.—Holotype, BM(NH) ZK 1962.6.1.
Spinola N.Sy. 23 Fcb 1821 (see comment below).
DESCRIPTION.—Holotype complete, of unknown sex, with
145 setigers, last 33 in regeneration; total length 135 mm;
maximal width 4 mm; length through setiger 10, 12.5 mm.
Prostomium (Figure 9a) distinctly shorter and narrower than
peristomium, as deep as V2 the peristomium. Prostomial lobes
frontally rounded, dorsally inflated; median sulcus deep. Eyes
not observed. Antennae in a transverse row, evenly spaced,
similar in thickness. Ceratophores ring-shaped in all antennae,
without articulations. Ceratostyles tapering, with up to 13
moniliform articulations in A-III; articulations limited to distal
half of styles. A-I to middle of peristomium; A-II to setiger 1;
A-III to setiger 2. Peristomium cylindrical. Separation between
rings visible only dorsally between bases of peristomial cirri;
anterior ring 3 A of total peristomial length. Peristomial cirri to
middle of prostomium, slender and digitiform, with 6 articulations.
Jaws not observed.
Branchiae present, pectinate (Figure 9e), distinctly shorter
than notopodial cirri in most setigers, longer than the
notopodial cirri in the few setigers around setiger 15, not
reduced in mid-body region, erect. Branchiae from setiger 3 to
setiger 134, missing in 12 last (regenerating) setigers. Branchiae
present to near posterior end, present on more than 65%
of total number of setigers. Last 2-3 pairs single filaments; all
other branchiae with at least two filaments. Maximum 9
filaments from about setiger 15. Length of branchiae decreasing
rapidly from about setiger 25; numbers of filaments
reduced to 3-4; this number retained for rest of branchial
region. Stems tapering, about as long as filaments. Filaments
distinctly shorter than notopodial cirri, digitiform.
Median acicular lobes distally truncate with aciculae
emerging dorsal to midline. Pre- and postsetal lobes low,
transverse folds. Ventral cirri tapering from narrow bases
through setiger 5. Median ventral cirri basally inflated. Bases
ovate or spherical, narrow tips digitiform. Inflated bases
reduced from about setiger 30. Ventral cirri digitiform in
posterior x h of body. All notopodial cirri slightly inflated
basally, articulated in all setigers with 3-4 distinct articulations
in most segments.
Limbate setae slender. Shafts of pectinate setae (Figure 9c)
wide, flat. Blades flaring, flat. One marginal tooth distinctly
longer than other teeth, with -15 teeth. Shafts of compound
falcigers (Figure 9b) inflated, with distinct internal striations,
marginally smooth; distal beaks present. Appendages short,
with wide bases, bidentatc. Proximal teeth shorter than distal
teeth, broadly triangular, directed laterally. Distal teeth gently
curved, directed laterally. Guards symmetrically bluntly
pointed, without mucros. Pscudocompound falcigers and
compound spinigcrs absent. Aciculae paired, black, tapering,
gently curved; cross-section round. Subacicular hooks (Figure
9d) black, bidentatc. Hooks first present from setigcr 35,
present in all setigers thereafter, always single. Hooks distally
rapidly tapering. Both teeth of similar size, directed obliquely
distally.
UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium and
anal cirri not described; jaws not described.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
Mx III long, located between Mx II and Mx IV, but not part of
arc with left Mx IV.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Features: 4, 6, 13, 14, 75, 78.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—75,1.
REMARKS.—The locality information on the label reads as
indicated above. Johnston did not know to what locality the
name Spinola referred. Johnston's 1865 work was issued
posthumously, and Baird wrote a set of "Addenda" and
"Corrigenda" to the volume printed as part of the volume; his
comment (Baird in Johnston, 1865:340) reads:
This is most probably not a British species. It is the E annulicornis of
Maximilian Spinola, but not described by him. It is very likely, from the label
upon the bottle, to have been sent to the Museum by Spinola, and is perhaps a
native of the Gulf of Genoa.
Eunice annulicornis agrees in most respects with E. torquata
Quatrefages; Fauvel (1923:401) suggested that they might be
synonymous. These two species arc the only ones listed in
Table 27 to have moniliform articulations in the ceratostyles.
They differ from each other in some minor details of the setae,
including the presence of marginal teeth along the upper end of
the shaft in E. torquata; such dentition is absent in E.
annulicornis. The peristomial cirri reach the anterior end of the
peristomium in E. torquata and to the middle of the
prostomium in E. annulicornis. The pectinate setae arc tapering