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Unformatted text preview: mostly marine worms well developed head with tentacles, etc. diverse feeding habits Clitellata – oligochaetes and leeches • freshwater and terrestrial • lack parapodia and tentacles • clitellum : thickened band, secretes cocoon for young BIS2C W2011 Lecture 30 (2 March 2011) 2 Oligochaetes – earthworms and related freshwater species • deposit feeders (recall Darwin’s observations) • cross-fertilizing hermaphrodites • eggs and sperm placed in protective cocoon Leeches • predators and blood-sucking ectoparasites • anterior and posterior suckers for attaching to prey • blood-feeders produce anesthetics (pain-killers), an anticoagulant , and a vasodilator Annelida Web sites: www.tolweb.org/Annelida http://en.wikipedia.org/wiki/Annelid http://www.ucmp.berkeley.edu/annelida/annelida.html http://www.annelida.net/ http://animaldiversity.ummz.umich.edu/site/accounts/information/Annelida.html...
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This note was uploaded on 03/09/2011 for the course BIS 2 taught by Professor Coolprof during the Spring '11 term at Bank Street College of Education.
- Spring '11