Abstract

The Artinskian Metaperrinites and Kungurian Perrinites faunas are recognized from the Ratburi Group of the Loei area, northcentral Thailand, and the Saraburi Group of the Saraburi area, southcentral of the country, respectively. They represent one of the chains of the Asia-European perrinitid belt that was distributed within the ancient Tethys from Crimea in the west to Timor in the east. A total of 14 species representing 11 genera in the perrinitid faunas are illustrated and described herein.

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