Echiura - ZOO 115 Invertebrate Zoology Phylum Echiura...

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ZOO 115 Invertebrate Zoology Phylum Echiura
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Phylum Echiura (Viper tail)- General Characteristics “Peanut worms” ~ 250 species Similar to Annelids but NO segmentation All marine benthic Sand, mud, with boring clams Some as deep as 10,000m From 1 cm to 2 m in length
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Phylum Echiura- external anatomy Two main body parts Trunk Proboscis (non- retractable) Some have a pair of chaetae similar to Annelids http://www.quadernsdigitals .net/datos_web/proyectos/p _307/bonelia.jpeg http://content.answers.com/main/content/i mg/McGrawHill/Encyclopedia/images/CE2 11200FG0010.gif
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Phylum Echiura- Locomotion Hydrostatic skeleton (coelom) Peristalsis - Similar to Sipunculids
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http://content.answers.com/main/content/im g/McGrawHill/Encyclopedia/images/CE2112 00FG0010.gif Phylum Echiura- Feeding and Digestion Most surface feeders (detritivore) mucus and cilia on proboscis food particles Suspension feeding mucus net ( Urechis caupo ) http://www.17slon.org/potapljanje/lokacije/hr/istra2/marina016-500.jpg Trunk hidden http://www2.ucsc.edu/seymourcenter/images/urechis4.JPG
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Echiura - ZOO 115 Invertebrate Zoology Phylum Echiura...

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