A Review of the Genus Eunice - Smithsonian Institution Libraries

72 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
Eunice atlantica is listed with similar species in Tables 41
and 42; it is too poorly known to be included in the key.
Eunice attenuata Grube, 1866
Eunice attenuata Grube, 1866b:68; 1878a:99.
REMARKS.—No material is available. It was originally
characterized as having branchiae from setiger 6 through
setiger 83 (of a total of more than 350 setigers) and with a
maximum of 11 filaments. A-III was described as reaching
setiger 2 (segment 4). The species was also characterized as
resembling E. prayensis. Grube (1878a) grouped the species
with those that had branchiae terminating in midbody, without
articulations in the ceratostyles, and without mucronate hoods
on the compound hooks.
The available information is clearly inadequate to characterize
the species and it is here considered indeterminable.
21. Eunice aucklandica Averincev, 1974
FIGURE 17a-f; TABLES 41,42
Eunice aucklandica Averincev. 1974:172-173, pi. 35: figs. 9-12.
MATERIAL EXAMINED.—Holotype, ZML 1/15807, Antarctic
Ocean, 51°13'1"S, 165°37'7"E. OB sta 74, 6 Apr 1956, 183 m
depth, coll. Averincev, Ushakov, Belijaev.
DESCRIPTION.—Holotype complete, of unknown sex, with
79 setigers; total length 18 mm; maximal width 1 mm at setiger
10; length through setiger 10, 3.2 mm. Body cylindrical
throughout, anteriorly truncate, tapering posteriorly. Anal cirri
articulated, as long as last 10 setigers.
Prostomium (Figure 17a) distinctly shorter and narrower
than peristomium, as deep as l li of the peristomium. Prostomial
lobes large, frontally rounded, slightly dorsally flattened;
median sulcus deep. Eyes lateral to bases of A-II, large.
Antennae in horseshoe, evenly spaced, similar in thickness.
Ceratophores ring-shaped in all antennae, without articulations.
Ceratostyles digitiform, with up to 8 large, short cylindrical
articulations in A-III. A-I to second peristomial ring; A-II to
setiger 2; A-III to setiger 3. Peristomium cylindrical. Separation
between rings distinct on all sides, especially well marked
dorsally and ventrally; anterior ring 3 /4 of total peristomial
length. Peristomial cirri to middle of first peristomial ring,
slender and tapering, without articulations.
Jaws not examined.
Branchiae present, palmate, distinctly longer than notopodial
cirri, not reduced in mid-body region. Branchiae from setiger 8
through setiger 21. Branchiae terminating well before posterior
end, present on less than 55% of total number of setigers. Most
branchiae single, digitiform filaments; some setigers with
paired filaments. Filaments longer than notopodial cirri in
middle of branchiated region.
Anterior neuropodial acicular lobes broadly rounded, becoming
slightly triangular in far posterior setigers; aciculae
emerging at midline (Figure 17f). Pre- and postsetal lobes low,
transverse folds. Anterior ventral cirri thick, tapering, becoming
basally inflated from about setiger 6. Inflated bases ovate,
gradually reduced from setiger 25, narrow lips tapering.
Posterior ventral cirri thick, abruptly tapering. Notopodial cirri
basally slightly inflated, tapering to digitiform tips, without
articulations.
Limbate setae marginally smooth. Shafts of pectinate setae
(Figure 17e) narrow, cylindrical. Blades tapering, flat. Both
marginal teeth thicker and slightly longer than other teeth, with
about 7 teeth. Shafts of compound falcigers (Figure 17b,d)
distally inflated, marginally smooth; distal beaks absent.
Appendages short, slightly tapering with large heads, bidentate
or tridentate (Figure 17b,d). Proximal teeth narrow, tapering,
directed laterally. Distal teeth about as long as proximal tooth,
curved; in some setae third, small teeth present, making distal
end of appendage appear nearly furcate. Guards symmetrically
bluntly pointed, marginally smooth, without mucros. Pseudocompound
falcigers and compound spinigcrs absent. Aciculae
at least paired in all sctigcrs, yellow, distally tapering,
straight, bluntly pointed. Separation between cores and sheaths
indistinct in both aciculae and subacicular hooks. Subacicular
hooks (Figure 17c) yellow, tridentate with teeth in a crest.
Hooks first present from setiger 18, present in all setigers
thereafter, paired in most setigers. Primary fangs large, curved.
Both distal fangs emerging from joint, thick bases, short,
triangular.
UKNOWN MORPHOLOGICAL FEATURES.—Jaw structure;
pygidium and anal cirri.
EXPECTED STATE 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: 39, 40,42.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice aucklandica is listed with similar
species in Tables 41 and 42. A characteristic feature is the
presence of paired subacicular hooks in most setigers. The
maximum number of branchial filaments is only two; all other
species in Table 42 have at least twice as many and have
distinct branchial shafts; a branchial shaft is missing in E.
aucklandica.
Eunice auriculata Treadwell, 1900
Eunice auriculata Treadwell, 1900:342-343; 1901:196-197, figs. 33-36b.
Eunice ariculata Hartman, 1959:308 [lapsus].
REMARKS.—The species was first named and recognizably
described in a short paper in which the characteristic rounded
smooth glandular organ attached ventrally on the notopodia
was mentioned. A more complete description was published
the following year and has been considered the original