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TaxNo: 5355Genus Prostacheoceras
Suborder: Goniatitina
Superfamily: Cycloloboidea
Family: Vidrioceratidae
Genus: Prostacheoceras
Qualifier: ge
Author: Ruzhentsev 1937,p.410
Lower Boundary: Gzhelian--Asselian [C--P], 299 million years
Upper Boundary: Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years