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The authors studied the herpetological fauna of Somuncura and Lago Buenos Aires formations. A new genus, Vilcunia, with one species V. silvanae, is described. Other lizards belonging to the genus Liolaemus are described under the names Liolaemus archeforus, Liolaemus ruizleali and Liolaemus elongatus petrophilus.
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Donoso-Barros et al. (1971) studied this question.
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