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1 Tree was published in this study

Evolutionary pattern and process within the Vertigo gouldii (Mollusca: Pulmonata, Pupillidae) group of minute North American land snails.
Nekola, Coles, Bergthorsson. (2009). Mol Phylogenet Evol.
Vertigo bollesiana Vertigo gouldii Vertigo nylanderi Vertigo arthuri Vertigo hannai Vertigo arizonensis Vertigo inserta Vertigo meramecensis Vertigo sp. AK 1 Vertigo ventricosa Vertigo modesta Vertigo concinnula Vertigo sp. AK 2 Vertigo coloradensis Vertigo cristata Vertigo hinkleyi Vertigo californica Pupilla hebes Pupilla muscorum Vallonia gracilicosta Gastrocopta tappaniana
0 6 11 17 23 Time (MYA)
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