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TaxNo: 6423Akiyoshiceras subridens+
Suborder: Goniatitina
Superfamily: Neoicoceratoidea
Family: Neoicoceratidae
Subfamily: Neoicoceratinae
Genus: Akiyoshiceras
Species: subridens+
Qualifier: ss
Author: Kyuma & Nishida 1987,p.28
Lower Boundary: RUS Branner./Gastr.--Diabol./Winslow. GZ, 311.7 million years
Upper Boundary: Diabol./Winsl--Paralego./Eowellerites GZ, 309.5 million years