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TaxNo: 4398Gyroceratites pallantianus
Suborder: Agoniatitina
Superfamily: Mimoceratoidea
Family: Mimoceratidae
Genus: Gyroceratites
Species: pallantianus
Qualifier: ss
Author: Montesinos & Tr. 1987,p.201
Lower Boundary: LD3C--LD3D: Anetoceras Range Zone top, 405.5 million years
Upper Boundary: Gyroceratites gracilis RZ base [13,80], 404 million years