The remains of Lagrivea were probably collected by Viret at the site La Grive L5 in the village of Saint-Alban-de-Roche, department of Isère, southeastern France.
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All come from the fissure filling (a fossil deposit formed when a rock fissure filled with sediment) of La Grive L5, part of the La Grive-Saint-Alban complex in Saint-Alban-de-Roche, southeastern France.