Deuterostomia (nomen a Carolo Grobben anno 1908 statutum) sunt animalium superphylum.
Subdivisiones proximae Chordata et Xenambulacraria esse proponuntur; Xenambulacrariis sunt divisiones quattuor, videlicet Xenoturbellida, Acoelomorpha, Echinodermata, Hemichordata. Deuterostomia a Protostomiis abhinc annorum 558 milies milium iam divisa fuisse censetur, aevo Praecambrio exeunte.
Saccorhytus coronarius abhinc annorum 540 milies milium vivebat
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Grobben, C. 1908. Die systematische Einteilung des Tierreiches. - Verhandlungen der k.k. zoologisch-botanischen Gesellschaft im Wien.
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Baguñà, J. & Riutort, M. 2004. The dawn of bilaterian animals: the case of acoelomorph flatworms. BioEssays 26: 1046-1057.
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