A diverse assemblage of spumellarine radiolarians has been recovered from a sample of the Bone Springs Limestone (Leonardian) in the southern Guadalupe Mountains of west Texas. Other Permian radiolarian assemblages in North America include King’s as yet undescribed assemblages from the Glass Mountains and assemblages from the Hegler and Lamar Limestone Members of the Bell Canyon Formation (Guadalupian). As no other certain Permian radiolarian assemblages are known worldwide, these west Texas faunas have much evolutionary and biostratigraphic significance. The Bone Springs fauna includes representatives of at least 15 genera, but taxonomic study is incomplete.

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