GeoChemBio.com/biology/organisms/Ciona intestinalis (sea squirt)

 

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Ciona intestinalis, sea squirt model tunicate

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Taxonomy

cellular organisms - Eukaryota - Fungi/Metazoa group - Metazoa - Eumetazoa - Bilateria - Coelomata - Deuterostomia - Chordata - Urochordata - Ascidiacea - Enterogona - Phlebobranchia - Cionidae - Ciona - Ciona intestinalis

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"Mr. Kovalevsky has lately [in 1866] observed that the larvae of ascidians are related to the Vertebrata, in their manner of development, in the relative position of the nervous system, and in posessing a structure closely like the chorda dorsalis of vertebrate animals; ... Thus, if we may rely on embryology, ever the safest guide in classification, it seems that we have at last gained a clew to the source whence the Vertebrata were originated." (Charles Darwin, 1874)

 

Brief facts

Importance as a model organism

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Organs

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Anatomy of tunicate, ascidian, Ciona

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Life cycle

C. intestinalis can spawn year around. Generation time is about 2-3 months.

Life Cycle Stages

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References

Websites and other references

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