A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 273
TABLE 13.—Variable and invariable features in the type lot of Eunice poly bronchia (N = number of individuals
examined; SD = standard deviation; measurements in mm).
VARIABLE FEATURES
Maximal width
Length through 10
Branchiae first present from setiger no.
Max. no. of branchial filaments
Subacicular hooks first present from setiger no.
N
7
7
7
7
6
Max.
5
13
8
5
36
Min.
2.5
6
7
4
24
Mean
3.71
8.71
7.71
4.86
29.17
SD
0.99
2.29
0.49
0.38
4.36
INVARIABLE FEATURES
Antennal articulations
Separation of rings
Pcristomial cirri reach
Perislomial cirral articulations
No. of teeth in pectinate setae
Acicular color
Acicular shape
Subacicular color
No. of subacicular teeth
Core-sheath construction
No. of teeth in pectinate setae
N=7
absent
visible dorsally and ventrally
prostomium
absent
15
black
tapering; straight
black
2
distinct
15
setiger 50 ventral cirri thick ventrolateral ridges; narrow tips
short and button-shaped. Inflated bases reduced from about
setiger 50; ventral cirri gradually displaced to posterior face of
neuropodia, directed dorsally behind acicular lobes. In last
setigers present ventral cirri thick, tapering. Notopodial cirri
digitiform, without articulations. Posterior notopodial cirri
curved over next posterior intersegmental furrows.
Limbate setae slender, marginally smooth. Pectinate setae
(Figure 91d,f) flaring, furled. One marginal tooth distinctly
larger than other teeth; 15 teeth present. Shafts of compound
falcigers (Figure 91g) inflated, marginally serrated. Appendages
(Figure 91b,g) tapering; heads distinct, bidentate. Proximal
and distal teeth similar in size in anterior and median
setigers; proximal teeth longer than distal teeth in posterior
setigers. Proximal teeth triangular, directed laterally. Distal
teeth gently curved. Guards symmetrically bluntly pointed;
mucros absent. Pseudocompound falcigers and compound
spinigers absent Notopodial aciculae slender, brown. Aciculae
paired, with dark brown to black cores and clear sheaths,
tapering, gently curved, considerably more prominent in
posterior than in anterior setigers; cross-section round. Subacicular
hooks (Figure 91c) with dark brown to black cores and
clear sheaths, bidentate. Hooks first present from setiger 24-36
(29 and 30 in 2 syntypes described), present in all setigers
thereafter, always single (except for replacements). Proximal
tooth twice as large as distal teeth, directed laterally. Distal
teeth nearly erect.
UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium
anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—None.
and
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 22, 56, 58, 59. Unknown
Characters: 1,2,4, 6, 36-38,40,47, 50, 63.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,1;
38,1.
REMARKS.—Verrill (1880) discussed material from a series
of Fish Hawk stations (865-895). The species was described in
a footnote on page 358. The paragraph to which the footnote is
attached discusses hard-bottom fauna from a series of stations,
"especially from stations 865-867," but no particular station is
mentioned as the type locality for the species. For that reason,
all material identified by Verrill as Leodice polybranchia from
Fish Hawk stations 865-895 must be considered syntypes and
are treated as such here. In order to stabilize the description, a
lectotype has been designated above.
Eunice polybranchia resembles E. norvegica as first noted
by Verrill (1880), and is listed with this and other similar
species in Table 27. In contrast to E. norvegica it lacks antennal
articulations and is listed with other species with which it
shares this features in Table 28. It is the only species in that
table to combine long peristomial cirri with having A-III
distinctly longer than A-II.
161. Eunice prayensis Kinberg, 1865
FIGURE 91i-l; TABLES 41-45
Eunice prayensis Kinberg, 1865:563.
Eunice vittata.—Hartman, 1948:77 [in part, not Nereis viilata Chiaje, 1828].
MATERIAL EXAMINED.—Two syntypes, RM 428, Atlantic
Ocean, Rio de Janeiro, Eugenie Expedition. Kinberg
(1865:563) gave locality information as "Portus ad Praya
grande juxta Rio Janerio."
DESCRIPTION.—One headless fragment of 42 setigers,
probably starting at setigers 3-5. Other syntype incomplete,