A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 297
posiscial lobes low, transverse folds. First 5 ventral cirri thick
and tapering. Ventral cirri basally inflated from setiger 6
through setiger 40. Inflated base large, transverse welts; narrow
tips tapering. Posterior ventral cirri thick and tapering and
about as long as notopodial cirri, but distinctly thicker. All
notopodial cirri thick, basally inflated, without articulations.
Limbatc setae slender, marginally smooth. Anterior pectinate
setae (Figure 100c) furled, slightly flaring. One marginal
tooth distinctly longer than other teeth; -15 teeth present
Posterior pectinate setae (Figure 1000 slightly less furled,
distinctly more flared. One marginal tooth longer than other
teeth; -20 teeth present. Shafts of compound falcigers (Figure
100b,g) distinctly inflated, marginally serrated; beak distinct.
All appendages similar in size, triangular with distinct heads,
bidentate. Proximal teeth narrow, slender, directed or curved
slightly distally. Distal teeth distinctly larger than proximal
teeth, gently curved. All guards symmetrically bluntly pointed,
nearly rounded; mucros absent. Pseudocompound falcigers and
compound spinigers absent. Aciculae single or paired, dark
brown, tapering, nearly straight, blunt-tipped; cross-sections
round. Separation between core and sheath indistinct in
aciculae. Subacicular hooks (Figure lOOh) with dark brown
cores and clear sheaths, bidentate. Hooks first present from
setiger 26, present in all setigers thereafter, always single
(except for replacements). Hooks tapering, slightly bent.
Proximal teeth larger than distal teeth; both teeth directed
distally.
UNKNOWN MORPHOLOGICAL FEATURES.—Pygidium
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: 1,2,6,13,14.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Eunice samoae was originally described as a
subspecies of E. mutilata. The branchial distribution differ
markedly in the two forms. The former has branchiae limited to
a short anterior part of the body, the latter has branchiae
distributed over most of the body. The shape of the branchiae
and the compound falcigers are also different.
Eunice samoae is listed with similar species in Tables 24 and
25. Of the four species in Table 25 that have cylindrical
articulations in the ceratostyles, two species, E. coccinea and E.
samoae, have short peristomial cirri; in the other two species
the peristomial cirri reach at least the peristomium. Eunice
samoae differs from E. coccinea in that it has the ventral cirri
inflated only in the median region; in the latter the ventral cirri
are basally inflated to near the posterior end.
The ceratostyles are very thick, nearly sausage-like, and the
branchial filaments are thick and distally abruptly tapering with
a slender tip; both features are missing in other species listed in
Table 24.
and
176. Eunice savignyi Grube, 1878
TABLES 19.20
Eunice savignyi Gnibc, 1878b:150-151.
DESCRIPTION.—Grube had available a single specimen,
which apparently now has been lost; the notes below are based
on his description.
Type specimen incomplete with 105 segments (nearly
complete according to Grube); length 63 mm.
Ceratostyles with long, cylindrical articulations. A-III to
setiger 16 with 14 articulations. Peristomial cirri reaching
beyond peristomium, with 5 articulations.
Maxillary formula 1+1, 6+6, 7+0, 5+9, and 1+1.
Branchiae pectinate. Branchiae from setiger 4 to setiger 45.
Branchiae terminating well before posterior end, present on less
than 55% of total number of setigers. Maximum 12 filaments.
Limbate and pectinate setae and compound falcigers
unknown. Aciculae and subacicular hooks yellow. Subacicular
hooks bidentate.
UNKNOWN MORPHOLOGICAL FEATURES.—Most prostomial
and peristomial features; jaw structure; all parapodial features;
limbate and pectinate setae; compound falcigers.
EXPECTED STATES OF SELECTED UNKNOWN FEATURES.—
None
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: None known. Unknown
Characters: 1-20, 23-26, 28, 32-34, 39, 40, 42-72,
74-76, 78, 80-82.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—69,1;
71,2; 72,2.
REMARKS.—The species was well characterized by Grube;
but some crucially important features were not mentioned by
Grube. It has been included in Tables 19 and 20 with similar
species, but has been excluded from the key.
Eunice savignyi cannot be distinguished from similar species
without examination of fresh material. The original specimen
came from an unnamed locality in the Philippines.
Eunice schemacephala Schmarda, 1861
Eunice schemacephala Schmarda, 1861:132, 7 figs., pi. 32: fig. 260.—Ebbs,
1966:527-534, fig. 9a-j.
Staurocephalus gregaricus Mayer, 1900:1.
IMayeria gregaricus.—Merrill, 1900:650.
REMARKS.—Schmarda's original description and illustrations
identify the species as a member of the genus; the only
relatively unique feature appears to be the short, unidentate
appendages of the compound falcigers. Ebbs identified the
species with the Atlantic palolo. However, the shape of the
appendages of the compound falcigers is not unique to this
species, nor does the color pattern described by Ebbs agree with
that illustrated by Schmarda.
Mayer described the Atlantic palolo as Staurocephalus
gregaricus; Verrill (1900) moved this species into a new genus,