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TaxNo: 5258Subfamily Spirolegoceratinae
Suborder: Goniatitina
Superfamily: Neoicoceratoidea
Family: Metalegoceratidae
Subfamily: Spirolegoceratinae
Qualifier: fs
Author: Nassichuk 1970,p.86
Lower Boundary: Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
Upper Boundary: Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years