A Review of the Genus Eunice - Smithsonian Institution Libraries

252 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY
paired, yellow, distally truncate or gently hammer-headed
(Figure 83b,e); cross-section round. Separation of cores and
sheaths indistinct in both aciculae and subacicular hooks.
Subacicular hooks (Figure 83c) yellow, tridentate with teeth in
a crest. Hooks first present from setiger 21. Hooks with
well-developed, distinct fangs.
UNKNOWN MORPHOLOGICAL FEATURES.—Relationship between
Mx III and left Mx IV; pygidium and anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 34, 56. Unknown
Characters: 1, 2,4,6, 32,42, 47, 50, 57-60, 63, 81, 82.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice papeetensis was described as a subspecies
of E. oliga; it differs at the species level from that species
in that it has branchiae limited to a short anterior region; £.
oliga has branchiae continued to near the posterior end.
Eunice papeetensis is listed with similar species in Tables 41
and 44. It has maximally three branchial filaments, whereas all
other species in Table 44 have at least eight filaments where the
branchiae are best developed.
146. Eunice parasegregata Hartmann-Schroder, 1965
FIGURE 83g-n; TABLES 19,21-23
Eunice parasegregata Hartmann-Schroder, 1965b:168-172, figs. 140-144.
MATERIAL EXAMINED.—Holotype, ZMH P-14273, off
Punta Lavapie, Chile, 37°08.7'S, 73°38.6'W, 58 m, fine sand
with rocks and dead algae, dredge and grab, 10 Mar 1960, coll.
Exp. Mar. Chile I.
COMMENTS ON MATERIAL EXAMINED.—The holotype is
currently in three pieces: an anterior end of 33 setiger, a median
piece of 10 branchiated setigers, and a mid-posterior abranchiate
piece of 22 setiger. A number of segments are missing
between both the anterior end and the short median fragment
and between the latter and the medioposterior fragment, but
exactly how many segments are missing cannot currently be
estimated.
DESCRIPTION.—Anterior end with 33 setigers; length 22
mm; maximal width 3 mm; length through setiger 10, 8 mm.
Prostomium (Figure 83g) distinctly shorter and narrower
than peristomium, as deep as x li of the peristomium. Prostomial
lobes frontally rounded, dorsally inflated; median sulcus
shallow. Eyes under peristomial fold, posterior to bases of A-I,
brown. Antennae in a horseshoe, evenly spaced, similar in
thickness. Ceratophores ring-shaped in all antennae, without
articulations. Ceratostyles slender and tapering; A-I with 3-4
drop-shaped articulations; A-I I and A-I 11 with 5 to 6 irregular,
cylindrical articulations; all articulations on distal half of
ceratostyles. A-I to posterior peristomial ring; A-II to setiger 5;
A-I 11 to setiger 6. Peristomium cylindrical. Separation between
distinct on all sides; anterior ring twice as long as posterior
ring. Peristomial cirri to middle of prostomium, slender and
digitiform, without articulations.
Maxillary formula 1+1, 14+16, 13+0, 10+16, and 1+1. Mx
III long, located behind left Mx II. Mx VI missing.
Branchiae (Figure 83n) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 3- to end of fragment, present on all
setigers of median fragment, missing on medioposterior
fragment. Branchiae terminating well before posterior end. All
branchiae with 2 or more filaments; maximum 18 filaments at
setiger 10; branchiae on median fragment with 2 to 3 filaments;
those of last segments in anterior end with at least 7 filaments.
All filaments slender, tapering, as long as notopodial cirri
except in first branchial segment.
Anterior ncuropodial acicular lobes distally obliquely truncate,
becoming distinctly truncate in last segments present;
aciculae emerging dorsal to midline. In medioposterior
fragment acicular lobes reduced, equally supported by aciculae
and subacicular hooks (Figure 83m). Anterior pre- and
postsetal lobes low, transverse folds. Posterior pre- and
postsetal lobes follow outline of acicular lobes closely. First 5
ventral cirri thick, tapering, becoming distinctly basally
inflated in branchiated setigers. Inflated bases nearly spherical;
narrow tips digitiform. Postbranchial ventral cirri slender and
nearly digitiform. All notopodial cirri basally slightly inflated,
tapering to slender tips, without articulations.
Limbate setae slender, marginally smooth. Pectinate setae
(Figure 83i,l) tapering, flat One marginal tooth much longer
and heavier than other teeth, -10 teeth present. Shafts of
compound falcigers (Figure 83hjc) distally inflated, marginally
serrated. Appendages triangular, bidentate. Proximal teeth
smaller than distal teeth, triangular, directed laterally. Distal
teeth gently curved. Guards distally asymmetrically bluntly
pointed; mucros absent Pseudocompound falcigers and compound
spinigers absent. Aciculae yellow, distally tapering,
gently curved; cross-section round. Separation between cores
and sheaths indistinct in both aciculae and subacicular hooks.
Subacicular hooks (Figure 83j) yellow, bidentate. Hooks
present on median and medioposterior fragments, present in all
setigers, always single (except for replacements). Hooks
tapering. Proximal teeth larger than distal teeth, directed
laterally. Distal teeth very short, nearly erect.
UNKNOWN MORPHOLOGICAL FEATURES.—Parapodial and
setal features of far posterior setigers; pygidium and anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—None.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Characters: 1, 2,4,6, 36, 38, 40, 80.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—38,2.
REMARKS.—Eunice parasegregata may belong to either
group A-l or A-2 and has been listed in Tables 19 and 22 as
well as in Tables 21 and 23. Because of the fragmented state of