Invertebrata

Contraria sunt vertebrata (pisces, amphibia, sauropsida, mammalia). Classificatio Linnaeana duas classes comprehendit, quae sunt insecta et vermes. Hodie viginti phyla constituunt, quae 97 centesimas omnium animalium esse computantur.

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  Pulmo^?
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  Scarabaeus
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  Vermis
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  Limax

• Hyman, L. H. 1940. The Invertebrates (6 volumes) New York : McGraw-Hill. A classic work.
• Anderson, D. T. (Ed.). (2001). Invertebrate zoology (2nd ed.). Oxford: Oxford University Press.
• Brusca, R. C., & Brusca, G. J. (2003). Invertebrates (2nd ed.). Sunderland, Mass. : Sinauer Associates.
• Miller, S.A.; Harley, J.P. (1999). Zoology (quarta ed.). Bostoniae: WCB/McGraw-Hill. pp. 750. ISBN 0697345556 .
• Pechenik, Jan A. (2005). Biology of the invertebrates. Bostoniae: McGraw-Hill, Higher Education. pp. 590. ISBN 0-07-234899-2 
• Ruppert, E. E., Fox, R. S., & Barnes, R. D. (2004). Invertebrate zoology: a functional evolutionary approach. Belmont, CA: Thomas-Brooks/Cole.
• Adiyodi, K.G. & Adyiodi, R.G. (Eds) 1983- . Reproductive Biology of Invertebrates. Wiley, New York. (Many volumes.)
• Giese, A.G. & Pearse, J.S. (Eds) 1974- . Reproduction of Marine Invertebrates. Academic Press, New York. (Many volumes.)
• Advances in Invertebrate Reproduction. Elsevier Science, Amsterdam. (Five volumes.)