Abstract
Two species of regular echinoids (Pseudocidaris lusitánica De Loriol and Pseudocidaris thurmanni (Agassiz)) are described from the San Ricardo Formation (Kimeridgian-Neocomiano) from sites located in the northeastern part of the State of Oaxaca and in the west-central part of the State of Chiapas… In order to continue, download the full paper in PDF.
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