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TaxNo: 6092Irinoceras tuba
Suborder: Tornoceratina
Superfamily: Prionoceratoidea
Family: Prionoceratidae
Subfamily: Prionoceratinae
Genus: Irinoceras
Species: tuba
Qualifier: ss
Author: Campbell et al. 1983,p.82
Lower Boundary: Fascip./Ammon.--Bollandoc./Bollandit. BZ, 345.3 million years
Upper Boundary: Holkerian--Asbian [V3a--V3b] [HLK--ASB], 336.5 million years