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TaxNo: 3531Metalegoceras spirale
Suborder: Goniatitina
Superfamily: Neoicoceratoidea
Family: Metalegoceratidae
Subfamily: Metalegoceratinae
Genus: Metalegoceras
Species: spirale
Qualifier: ss
Author: Zhao & Zheng 1977,p.243
Lower Boundary: Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years
Upper Boundary: Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years