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
Suaburi 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.