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TaxNo: 5253Subfamily Eothinitinae
Suborder: Goniatitina
Superfamily: Neoicoceratoidea
Family: Metalegoceratidae
Subfamily: Eothinitinae
Qualifier: fs
Author: Ruzhencev 1956,p.193
Lower Boundary: Sakmarian--Artinskian [SAK--ART], 284.4 million years
Upper Boundary: Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years