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TaxNo: 4181Neogeoceras marcoui
Suborder: Prolecanitina
Superfamily: Medlicottioidea
Family: Medlicottiidae
Subfamily: Medlicottiinae
Genus: Neogeoceras
Species: marcoui
Qualifier: ss
Author: Gemmellaro 1887,p.52
Lower Boundary: Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years
Upper Boundary: Wordian--Capitanian (Midian) [WOR--CAP], 265.8 million years