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Die Gastraea-Theorie, die phylogenetische Classification des Thierreichs und die Homologie der Keimblätter.Jena. Z. Naturw., 8, 1-55., Jena, 1874.Haeckel’s gastraea theory, which considers the two-layered gastrula as the ancestral form of multicellular animals. Subjects: Biology, Evolution Permalink: historyofmedicine.com/id/2058 |