A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 127
55. Eunice edwardsi Mclntosh, 1885
FIGURE 39h; TABLES 19, 21
Eunice edwardsi Mclntosh, 1885:280-282, figs. 39-40, pi. 38: figs. 14, 15, pi.
20A: figs. 4-7.
MATERIAL EXAMINED.—Holotype, BM(NH) ZK.
1885.12.1.3., off Prince Edward Island, Indian Ocean, 46°40'S,
37°5O'E, 567 and 274 m, 27 Dec 1873, Challenger sta 145.
COMMENTS ON MATERIAL EXAMINED.—The holotype has at
one time been dried out and the setae are all broken; it is in two
pieces and has been deeply dissected frontally; the jaw
apparatus is now missing.
DESCRIPTION.—Holotype complete, of unknown sex, with
118 sctigcrs; total length about 70 mm; maximal width 3.5 mm
wide at sctigcr 10; length through setiger 10, 8 mm. Body
circular in cross-sec lion, tapering posteriorly.
Prostomium (Figure 39h) distinctly shorter and narrower
than pcristomium, less than x li as deep as peristomium.
Prostomial lobes frontally rounded, dorsally inflated; median
sulcus shallow. Eyes between bases of A-I and A-II, black.
Antennae in transverse row; A-I and A-II grouped together,
separated by gap from A-I 11; all antennae similar in thickness.
Ceratophores ring-shaped in all antennae, without articulations.
Ceratostyles digitiform, with up to 5 cylindrical articulations in
A-I 11. A-I to middle of anterior peristomial ring; A-II to setiger
1; A-III to setiger 3. Peristomium about twice as long as
prostomium, cylindrical. Separation between rings especially
distinct dorsally and ventrally, but also visible laterally;
anterior ring 2 /3 of total peristomial length. Peristomial cirri to
middle of prostomium, digitiform, without articulations.
Maxillary formula (1+1), 8+8, 10+0, 6+12, and 1+1
according to Mclntosh (1885, fig. 39). Mx I missing in
illustration.
Branchiae present, pectinate, about as long as notopodial
cirri, not reduced in mid-body region, erect. Branchiae from
setiger 3 to setiger 34; to setiger 41 according to Mclntosh
(1885). Branchiae terminating well before posterior end,
present on less than 55% of total number of setigers. First 5 and
last 2 branchiae single filaments, between setiger 10 and 20
number of filaments increasing to 5 or 6.
Neuropodial acicular lobes distally rounded, becoming
conical in last segments present; aciculae emerging at midline.
Pre- and postsetal lobes visible only as low folds. First 5 ventral
cirri thick, tapering, becoming distinctly inflated basally from
about setiger 6. Inflated bases ovate; narrow tips tapering.
Inflated bases reduced from about setiger 25. Posterior ventral
cirri somewhat shorter and thicker than notopodial cirri,
tapering. Notopodial cirri basally somewhat inflated, rather
thick in first 20 setigers, becoming increasingly digitiform
posteriorly, without articulations.
All setae broken. According to Mclntosh's illustrations
(1885, pi. 20A: figs. 5-8), pectinate setae with few teeth and 1
marginal tooth distinctly longer than other teeth. Compound
falcigers bidentate; both teeth well developed. Guards blunt
without marginal serrations; mucros absent. Aciculae yellow,
apparently bluntly rounded distally; cross-section round.
Subacicular hooks yellow, bidentate. Hooks first present from
setiger 28. Hooks tapering. Both teeth directed distally.
Proximal teeth very much larger than distal teeth.
UNKNOWN MORPHOLOGICAL FEATURES.—Relationship between
Mx III and left Mx IV; details of setal structures;
pygidium and anal cirri.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—Mx III long and located behind left Mx II. Pseudocompound
falcigers and compound spinigers absent.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 56, 58, 59. Unknown
Characters: 65-68, 71, 72, 81, 82.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—71,2;
72,2.
REMARKS.—Eunice edwardsi is listed with similar species
in Tables 19 and 21. It does not appear to be characterized by
a single unique feature, but rather by a combination of a whole
set of minor features.
46. Eunice ehlersi Gravier, 1900
FIGURE 40a-e; TABLES 33-35
Eunice ehlersi Gravier, 1900:248-251, figs. 110-113,pl. 13: figs. 75,76.
MATERIAL EXAMINED.—Holotype, MNHN, Paris, Djibouti,
1897, coll. Coutiere, no. 29.
DESCRIPTION.—Holotype incomplete, of unknown sex, with
53 setigers; length 25 mm; maximal width 4 mm at setiger 10;
length through setiger 10, 6 mm. Body cylindrical.
Prostomium (Figure 40a) distinctly shorter and narrower
than peristomium, less than V2 as deep as peristomium.
Prostomial lobes frontally obliquely truncate, dorsally flattened;
median sulcus deep. Eyes present posterior to A-I, dark.
Antennae in shallow horseshoe, evenly spaced, similar in
thickness. Ceratophores ring-shaped, without articulations.
Ceratostyles digitiform, with up to 8 short, cylindrical
articulations in A-III. A-I to posterior peristomial ring; A-II and
A-III to setiger 3. Peristomium flaring slightly ventrally.
Separation between rings distinct on all sides; anterior ring 2 h
of total peristomial length on dorsal side and ~ 3 A on ventral
side. Peristomial cirri to front edge of peristomium, digitiform,
without articulations.
Maxillary formula 1+1,5+6, 8+0, 3+9, and 1+1. Distal tooth
on right Mx II very small. Mx III long, located in part behind
Mx II, however forming arc with very short left Mx IV. Mx VI
absent.
Branchiae (Figure 40e) present, pectinate, distinctly longer
than notopodial cirri, flexible. Branchiae from setiger 14 to end
of fragment. First branchiae single filaments, maximum 6