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Stylatractus universus Hays, 1970

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Stylatractus universus
Remarks: The younger form of this species has stouter polar spines and thicker cortical shell. The older form is very similar to Amphistylus angelinus (Campbell and Clark), but differs in having a more prolate cortical shell.
Abundance: Few.
Range: Upper Miocene to lower Pleistocene.



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