Euclymene zonalis (Verrill, 1874)
Common name(s): Bamboo worm
|Synonyms: Praxilla zonalis|
|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 cm diameter. The head is at the lower end in the photo and the view is of the left side. There is an injury partway back on the body.|
|(Photo by: Dave Cowles, July 2007)|
How to Distinguish from Similar Species: Euclymene sp has distinct notches in the rim of its cephalic plate, but it may merely be a variation of E. zonalis. Many members of the family have no setae on the last several segments, or have prominent 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.
Geographical Range: OBIS records include specimens from the Pacific Northwest and British Columbia coasts and from the New England states and Nova Scotia
Habitat: This family is often found in tubes on sandy/muddy beaches, often projecting from the sand. This individual was subtidal on soft bottom.
|Main Page||Alphabetic Index||Systematic Index||Glossary|
Type the article information within this span
General Notes and Observations: Locations, abundances, unusual behaviors:
Various photomicroscopic views of Euclymene zonalis' head
|In this nearly ventral view the mouth can be clearly seen. Note that setiger 1 is clearly distinct from the prostomium/peristomium and from setiger 2, and that its notosetae are capillary setae.||This lateral view clearly shows the cephalic shield dorsal to the mouth. The shield has a raised, leathery rim which does not have large, distinct lateral slits in it.||This dorsal view of the head shows the cephalic shield.|
Views 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 notosetae (top). There are a few small uncini for neurosetae (in bottom slit).|
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 are uncini.