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Nemerta

Ribbon Worms

QuestionAnswer
Nemertines Mostly marine, common inhabitants of marine shallow water environments
Ribbon Worms 900 species, 1cm to several meters, bootlace worm=longest of known animals 98ft, recognized as its own phylum
Bootlace worm Guiness world record -- 55m or 180ft long
Ribbonworms vs Flatworms SIMILARITIES nervous systems; sense organs; protonephridial excretory system
Ribbonworms vs flatworms DIFFERENCES complete digestive system, closed circulatory
Proboscis and Rhychocoel Eversible proboscis, surrounded by chamber = rhychocoel (snout cavity); distinct from digestive tract; proboscis can be shot out with explosive force; discharged by muscularute of rhynchocoel; unique to nemerteans
Classification Proboscis, mouth location, body wall muscles and longitudinal nerve cords differentiate classes and orders
Nemertean Bauplan Controversy whether coelom present or not - functionally acoelomate; circulatory system solves problems related to inte
Created by: msc6r
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