Phylum Nemertea — Ribbon Worms
Characteristics
- Body usually very long, flattened
- Unsegmented
- Complete gut (separate mouth and anus)
- Closed circulatory system
- Retractable proboscis posterior to gut; housed in cavity: rhynchocoel (coelom)
- Mostly marine, a few in fresh water or terrestrial
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Many-lined Ribbon Worm, Baseodiscus delineatus; La Jolla, CA
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Ribbon Worm, Oerstedia dorsalis; an atypically short species; La Jolla, CA
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Milky Ribbonworm, Cerebratulus lacteus, preserved specimen. Color varies with age and sex
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Unidentified Nemertean cross sections
See also labeled photo.
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