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TaxNo: 4175Spirolegoceras fischeri+
Suborder: Goniatitina
Superfamily: Neoicoceratoidea
Family: Metalegoceratidae
Subfamily: Spirolegoceratinae
Genus: Spirolegoceras
Species: fischeri+
Qualifier: ss
Author: Miller et al. 1957,p.1064
Lower Boundary: Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years
Upper Boundary: Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years