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†Juanognathus variabilis Serpagli 1974
urn:lsid:organismnames.com:name:2152207
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†Juanognathus variabilis Serpagli 1974
Serpagli 1974. Lower ordovician conodonts from Precordilleran Argentina (Province of San Juan). Bollettino Soc paleont ital, 13(1-2) 1974: 17-98