A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 113
45. Eunice complanata Grube, 1877
TABLES 33,37-39
Eunice complanata Grube, 1877:529-530.—Fauchald, 1986:246-247.
MATERIAL EXAMINED.—Holotype, ZMB, type 880, Timor,
Atapupa, coral reef and Salawatti, coral reef.
COMMENTS ON MATERIAL EXAMINED.—The type is now
completely dry and clearly has been dry for some time.
DESCRIPTION.—Holotype with about 100 setigers; reported
length, 72 mm, probably correct.
Prostomium completely shrunken. Black eyes present
between bases of A-I and A-II. All antennae apparently
outrcaching tip of prostomium, without obvious articulations.
Separation between peristomial rings distinct dorsally and
ventrally; anterior ring more than 5 /s of total peristomial length.
Peristomial cirri at least as long as antennae, reaching well
beyond frontal margin of peristomium, without obvious
articulations.
Maxillary formula 1+1, 5+5, 5+0, 4+8, and 1+1. Mx III
forming distal arc with short, curved Mx IV. Mx VI missing.
Branchiae present, pectinate, distinctly longer than notopodial
cirri, not reduced in mid-body region. Branchiae from
setiger 19, well developed on last seugers present (setiger 100).
First 2 pairs possibly with single filaments only; all other
branchiae pectinate; maximum 6 filaments. Branchial stems
strong, erect.
Ventral cirri apparently basally inflated in some anteromedial
setigers; narrow tips tapering.
Limbate and pectinate setae present. Appendages of compound
hooks bidentate. Guards without rnucros. Aciculae and
subacicular hooks dark brown. Aciculae tapering to blunt tips;
cross-section of aciculae round. Subacicular hooks bidentate;
first present from setiger 28, rather thick in relation to aciculae.
UNKNOWN MORPHOLOGICAL FEATURES.—Most prostomial
and peristomial features, jaw structure; most parapodial
structures.
EXPECTED STATES OF UNKNOWN MORPHOLOGICAL FEA-
TURES.—Species too poorly known to make predictions.
CHARACTERS USED IN PREPARATION OF KEY NOT
SCORED.—Inappropriate Characters: 22, 56. Unknown
Characters: 3, 12, 15-20, 23, 24, 28, 34, 36-38, 40, 42-52,
54, 57-68, 74, 78.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—37,1;
38,1.
REMARKS.—Unless the branchial distribution was highly
unusual, the branchiae must have continued for at least another
20 setigers beyond the end of the incomplete specimen.
The parapodia are well developed and distinct, but are so
distorted that they cannot be described in any additional detail.
Due to the distribution of branchiae, color of the aciculae and
subacicular hooks, and the dentition of the latter, E. complanata
is here considered related to E. afra and similar species and
is listed with these in Table 33 and Tables 37-39. It is too
poorly known to be included in the key.
Eunice concinna (Verrill, 1900)
Leodice concinna Verrill, 1900:643.—Hartman, 1942:8.
REMARKS.—The type is not present in the collections of the
Peabody Museum and has not been present since before 1940
(Hartman, 1942; W. Hartman, in litL). The only information of
any value in the original description is the mention of the
strongly beaded antennae and the presence of branchiae only on
the anterior part of the body starting at setiger 3.
Verrill stated that the species resembled E. stigmatura,
which in turn has been considered synonymous with E. vittata
(but see below). The branchial distribution is consistent with a
membership in group C-l, but the strongly beaded antennae
mentioned for E. concinna would differentiate the species from
E. vittata and E. stigmatura.
The information is clearly insufficient to identify E.
concinna and, whereas the types are lost, cannot be improved.
The species is here considered indeterminable.
46. Eunice congesta Marenzeller, 1879
FIGURE 341-q; TABLES 41,45
Eunice congesta Marenzeller, 1879:134-135, pi. 4: fig. 2a-d.
MATERIAL EXAMINED.—Holotype, ZMW Inv. no. 1042,
East coast of Eno-shima, Japan, coll. C. Koerbl.
COMMENTS ON MATERIAL EXAMINED.—The type lot consists
of an anterior end of 50 setigers, here considered the
holotype, and one anterior fragment missing the head and
perhaps the first 10 setigers and two midposterior fragments.
Only the anterior end is here described in detail; the other
fragments present agree with this anterior end, but neither of
the two mid-posterior fragments can unequivocally be associated
with the anterior end.
DESCRIPTION.—Holotype with 50 setigers; length 22 mm;
maximal width 4 mm at setiger 10; length through setiger 10,6
mm. Body cylindrical, truncate anteriorly.
Prostomium (Figure 341) distinctly shorter and narrower than
peristomium, as deep as l /2 of the peristomium. Prostomial
lobes frontally rounded, dorsally inflated; median sulcus
shallow. Dark purple eyes present between bases of A-I and
A-II. Antennae in a horseshoe. Ceratophores ring-shaped in all
antennae, without articulations. Ceratostyles slender and
digitiform, without articulations. A-I missing; A-II to setiger 1;
A-III to setiger 2. Peristomium cylindrical. Separation between
rings distinct on all sides; anterior ring - 2 /3 of total peristomial
length. Peristomial cirri missing, but scar visible.
Maxillary formula 1+1, 6+8,6+0, 6+7, and 1+1 according to
Marenzeller (1879:135, pi. 4: fig. 2C). Mx III long, located
behind left Mx II. Mx VI missing.
Branchiae (Figure 34q) present, pectinate, distinctly longer
than notopodial cirri, not reduced in mid-body region, erect.
Branchiae from setiger 7 to setiger 47. Only first branchia with
single filaments; all other branchiae pectinate with up to 18
filaments. Branchial stems strong, erect. Filaments tapering to