Urochordata - Tunicates and Sea Squirts

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Last updated 12:06 AM on 4/25/26
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4 Terms

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Description

Sessile filter feeders; encased in tunic layer (cellulose)

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Adults

Only retain pharyngeal gill slits and endostyle (lose other chordate features)

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Tadpole Larvae

Have all chordate characteristics

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Paedomorphosis

Evolutionary process where larval/juvenile features of an ancestor are retain in adult descendants; explains vertebrate ancestry from tunicate-like ancestor