A Review of the Genus Eunice - Smithsonian Institution Libraries

NUMBER 523 219
TABLE 8.—Variable and invariable features in the type lot of Eunice mexicana (N = number of individuals
examined; SD = standard deviation; measurements in mm).
VARIABLE FEATURES
Maximal width
Length through 10
No. of antennal articulations
Branchiae present to sctiger no.
Max. no. of branchial filaments
Ventral cirri inflated through sctiger no.
Subacicular hooks first present from
N
Max.
11 4
11 10.5
3 21
11 40
11 18
10 30
11 32
Min.
2
6
16
26
15
20
21
Mean
3.2
8.8
18.67
34
16.91
26.4
26.45
SD
0.64
1.63
2.52
3.61
1.38
2.95
3.11
INVARIABLE FEATURES
Separation of rings
Peristomial cirri reach
No. of peristomial cirral articulations
Branchiae first present from sctiger no.
No. of notopodial articulations
Pectinate setae
No. of teeth in pectinate setae
Shafts of compound falcigers
Guards of compound falcigers
Acicular color
Acicular shape
Subacicular color
No. of teeth in subacicular hooks
Core-sheath construction
N=ll
visible dorsally and ventrally
middle of prostomium
4
3
5
tapering; furled
10
tapering
bluntly pointed to rounded
yellow
flattened tab
yellow
2
visible
bidentate. Hooks first present from setiger 32, present in all
setigers thereafter, usually 3 in a vertical row in posterior
setigers. Hooks gently curved; necks and heads distinct.
Proximal teeth larger than distal teeth, directed laterally. Distal
teeth nearly erect, slender.
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: None.
ASSUMED STATES FOR PURPOSE OF PREPARING KEY.—
None.
REMARKS.—Through a lapsus, type locality and type
specimens were not designated when the species was first
described; I take the opportunity to rectify the error at this time
by designating lecto- and paralectotypes for the species. As
indicated above, the species is separated from other species in
the group by the same kinds of characters used to separate other
species, thus subspecific status originally designated is unjustified.
Eunice mexicana is listed with similar species in Tables 19
and 20. It is very similar to E. pennata in distributional features,
but can be separated from it by having 18 rather than 12
branchial filaments and usually three subacicular hooks in a
vertical row rather than having maximally paired subacicular
hooks as in E. pennata.
Eunice elegans (see Table 24) also resembles E. mexicana
and
closely, but can be separated as suggested in the discussion of
the former.
122. Eunice microprion Marenzeller, 1879
FIGURE 73a-k; TABLES 27,29
Eunice microprion Marenzeller, 1879:135-136, pi 5: fig. 1, 1A-1D.—Imajima
and Hartman, 1964:252.
MATERIAL EXAMINED.—ZMW 1062, Jaqashima, Japan,
don. DOderlein, 1 specimen; ZMW 1064, Eno Shima, Japan,
don. Doderlein, 1 specimen.
COMMENTS ON MATERIAL EXAMINED.—The specimens
listed above are not the types, but specimens identified by v.
Marenzeller from collections taken at or near the type area.
DESCRIPTION.—Specimen from ZMW 1062 complete with
127 setigers; total length 82 mm; maximal width 5 mm; length
through setiger 10, 10 mm. Other specimen incomplete with
124 setigers; length 85 mm; maximal length 5 mm; length
through setiger 10,12 mm. Both specimens cylindrical, gently
tapering. Anal cirri as long as last 10 setigers together.
Prostomium (Figure 73a) distinctly shorter and narrower
than peristomium, less than x li as deep as peristomium.
Prostomial lobes frontally obliquely truncate, dorsally excavate
with a thickened rim; median sulcus deep. Eyes near bases of
A-II, dark. Antennae in a horseshoe; with A-III isolated by a
gap, similar in thickness. Ceratophores ring-shaped in all
antennae, without articulations. Ceratostyles tapering very
slowly towards tips, with up to 10 poorly marked, cylindrical