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TaxNo: 4173Metalegoceras crenatum
Suborder: Goniatitina
Superfamily: Neoicoceratoidea
Family: Metalegoceratidae
Subfamily: Metalegoceratinae
Genus: Metalegoceras
Species: crenatum
Qualifier: ss
Author: Nassichuk et al. 1965,p.27
Lower Boundary: TAP Kochusu Fm. base, 270.6 million years
Upper Boundary: Kochusu Fm.,lower,basal lst.--lower part, 270.3 million years