A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 91
compound falcigcrs (Figure 24b) slightly inflated, marginally
serrated, with distinct distal beak. Appendages short, thick with
short, nearly truncate heads, bidentate. Proximal teeth triangular,
directed laterally; distal teeth larger than proximal teeth,
bent, blunt, directed laterally. Guards asymmetrically bluntly
pointed, marginally serrated, without mucros. Pseudocompound
falcigers and compound spinigers absent. Aciculae
(Figure 24d) paired, yellow, tapering, with narrow, straight or
gently curved tips; cross-section round. Separation between
core and sheath indistinct in both aciculae and subacicular
hooks. Subacicular hooks (Figure 24c) yellow, tridentate with
teeth in a crest. Hooks first present from setiger 25, present in
all setigers thereafter, always single (except for replacements).
Teeth decreasing rather evenly in size from proximal to distal.
All 3 teeth distinctly curved.
UKNOWN MORPHOLOGICAL FEATURES.—Presence and location
of eyes; jaw structure; various features associated with the
incomplete nature of the type such as the detailed distribution
of branchiae.
EXPECTED STATE OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—Mx III long, located behind left Mx II; not part of
distal arc.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Characters: 1,2, 13,14,16,33,36-38,40,47,50,51,64-68.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,1;
38,1.
REMARKS.—Eunice bottae has not been reported since the
original description and the review of the original material
given by Grube (1870a). It is listed with similar species in
Tables 46 and 47. The anterior and posterior rings of the
peristomium are completely distinct in E. bottae and E. lucei;
in all other species in Table 47, the separation is indistinct
laterally. The inflated bases of median ventral cirri are ovate in
E. bottae and form thick, transverse welts in E. lucei.
33. Eunice bowerbanki Baird, 1869
FIGURE 26; TABLES 27, 32
Eunice bowerbanki Baird, 1869:349-350.—Fauchald, 1986:245-246, figs.
17-23.
MATERIAL EXAMINED.—Holotype, BM(NH) ZH
1863.923.41, Australia, coll. Dr. Bowerbank.
DESCRIPTION.—Holotype complete, with 142 setigers; total
length 95 mm; maximal width 7 mm at about setiger 20. Length
through setiger 10, 11 mm; width at setiger 10, 6.5 mm. Body
anteriorly cylindrical, becoming dorsoventrally flattened.
Prostomium (Figure 26a) distinctly shorter and narrower
than peristomium, less than l /2 as deep as peristomium.
Prostomial lobes frontally rounded, dorsally inflated; median
sulcus deep. Antennae in a transverse line, evenly spaced,
similar in thickness. Ceratophores ring-shaped in all antennae,
without articulations. Ceratostyles tapering, distinctly articulated;
inner articulations cylindrical; outermost articulations
moniliform; maximal number of articulations 8 in A-III. A-I to
posterior peristomial ring; A-I I and A-III to setiger 1.
Peristomium massive, cylindrical, with distinct muscular lower
lip. Separation between rings distinct dorsally and ventrally;
anterior ring 6 /7 of total peristomial length. Peristomial cirri to
middle of anterior peristomial ring, digitiform, with 4
articulations.
Maxillary formula 1+1, 4+4, 5+0, 5+8, and 1+1. Mx III
curved, forming part of distal arc with left Mx IV. Mx VI
absent.
Branchiae (Figure 26b) present, pectinate, distinctly longer
than notopodial cirri, reduced in mid-body region, flexible.
Branchiae from setiger 5 to setiger 136. Branchiae present to
near posterior end, present on more than 65% of total number
of setigers. Posterior half of branchiated setigers with single
filaments only; first branchia with 3 filaments; maximum
number of filaments 15 by setiger 12; number and length of
filaments rapidly decreasing posteriorly; by setiger 25, 5-6
short, digitiform filaments present. Branchial stems erect,
tapering, longer than filaments. Filaments thick, digitiform,
longer than notopodial cirri.
Neuropodial acicular lobes triangular, nearly symmetrical.
All presetal lobes low folds. Anterior postsetal lobe free, as
long as acicular lobes, rounded; postsetal lobes reduced to low
folds by setiger 20. Ventral cirri thick, digitiform in all setigers;
basal inflation indistinct. Notopodial cirri supported by paired
aciculae, increasing in length through setiger 3, decreasing in
length through next several setigers. Prebranchial and early
branchial notopodial cirri digitiform, with 2 to 3 articulations,
tapering, becoming more pyriform; basal inflation decreasing
posteriorly; by setiger 20 notopodial cirri, thick, digitiform,
without articulations.
Limbate setae longer than other setae, marginally serrated.
Pectinate setae (Figure 26e) short. Shafts coarse, flattened;
blades tapering, flat. Both marginal teeth somewhat thicker
than the other teeth, but no longer than other the teeth; -15 teeth
present. Shafts of compound falcigers (Figure 260 tapering,
with internal striations, marginally smooth; distal beak indistinct.
Appendages short, tapering, with large head, bidentate.
Proximal teeth triangular, directed laterally; distal teeth longer
than proximal teeth, tapering, nearly erect. Guards asymmetrically
bluntly pointed, without mucros. Pseudocompound
falcigers and compound spinigers absent. Aciculae usually
paired, black; superior aciculae slender, tapering to straight
tips; inferior aciculae (Figure 26c) thicker than superior
aciculae, distinctly bent ventrally; cross-section round. Subacicular
hooks (Figure 26d) black, bidentate. Hooks first present
from setiger 31, present in all setigers thereafter, paired in some
setigers. Hooks tapering smoothly to tips; teeth similar in
length; proximal teeth thicker than distal teeth; both directed
distally; guards not observed.
UKNOWN MORPHOLOGICAL FEATURES.—Presence and position
of eyes; pygidium and anal cirri.