As with other members
of family Maldanidae (bamboo worms), this species has segments which
mostly longer than wide. The first setigers
are clearly demarcated from each other. This individual has
plus the prostomium/peristomium.
It has a cephalic plate on the prostomium
cephalic plate has a conspicuous,
leathery rim in which the lateral notches are not prominent (photos).
1 is clearly
demarcated from the prostomium/peristomium
and has several capillary
and a few
The neuropodia of
the first 3-4 setigers
have only a few setae,
and these are modified uncini
of the segments have ringlike
folds in the skin. The glandular rings around setigers
5 and after are not prominent. The last several segments all
The anus is
central on a funnel-like projection from the posterior end of the pygidium
(photo). The cirri around the pygidial
funnel are all about the same length.
Euclymene zonalis (Verrill, 1874)
Common name(s): Bamboo worm
|Euclymene zonalis collected from
mud at 120 m depth near Yellow
Island, San Juan Channel. The animal is 18 cm long and 0.5-1
The head is at the lower end in the photo and the view is of the left
There is an injury partway back on the body.
|(Photo by: Dave Cowles,
How to Distinguish from
Euclymene sp has distinct notches in the rim of its
but it may merely be a variation of E. zonalis.
of the family have no setae on the last several segments, or have
collars around some of the segments.
Note: Thanks to Leslie Harris, a Polychaete
specialist , I have learned that Eyclymene
zonalis is probably not the species on our Pacific coast.
The actual species name is uncertain.
Range: OBIS records
include specimens from the Pacific Northwest and British Columbia
and from the New England states and Nova Scotia
This family is often found
in tubes on sandy/muddy beaches, often projecting from the
This individual was subtidal on soft bottom.
Kozloff 1987, 1996
Type the article
information within this span
General Notes and
abundances, unusual behaviors:
photomicroscopic views of Euclymene
|In this nearly ventral view the mouth can be
clearly seen. Note
1 is clearly
distinct from the prostomium/peristomium
and from setiger 2, and that its notosetae
||This lateral view clearly shows the cephalic shield
The shield has a raised, leathery rim which does not have large,
lateral slits in it.
||This dorsal view of the head shows the cephalic shield.
through the dissecting microscope of
the setae on the first few segments:
|This is a view of the setae on setiger
1. Dorsal is upward and anterior is to the left.
There is a
tuft of several capillary notosetae
but few if any neurosetae.
||This is a view of the setae on setiger
2, in the same orientation. There is a tuft of capillary
There are a few small uncini
The anus is on a conelike
projection from the pygidium.
The last several segments have setae.
In this photomicrograph, the notosetae
of the last segment are capillary
and the neurosetae
Authors and Editors of
Dave Cowles (2007): Created original page
Jonathan Cowles (2007): Updated page with CSS