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TaxNo: 1081Gyroceratites glaber
Suborder: Agoniatitina
Superfamily: Mimoceratoidea
Family: Mimoceratidae
Genus: Gyroceratites
Species: glaber
Qualifier: ss
Author: Bogoslovsky 1961,p.61
Lower Boundary: LD4A--LD4B:G.grac.--Latanar. noeggerati, 401.6 million years
Upper Boundary: LD4D A.lateseptatus Zone top[di96:20,00], 398 million years