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TaxNo: 3006Subgenus Kenseyoceras
Suborder: Tornoceratina
Superfamily: Prionoceratoidea
Family: Prionoceratidae
Subfamily: Prionoceratinae
Genus: Balvia
Subgenus: Kenseyoceras
Qualifier: gy
Author: Selwood 1960,p.171
Valid: Balvia Lange,1929 [TAX3005]
Lower Boundary: UD6B--UD6C1 Kamptoclym. endogona base, 362.4 million years
Upper Boundary: UD6E--UD6F:Cym.nigra--A.prorsum [19,40], 360 million years