{{Short description|Genus of molluscs (fossil)}} {{Automatic taxobox | fossil_range = Cretaceous | image = Eupachydiscus haradai - Osaka Museum of Natural History - DSC07808.JPG | image_caption = ''Eupachydiscus haradai'' | taxon = Eupachydiscus | authority = Spath, 1922 }} {{Commons category}}

'''''Eupachydisus''''' is a large, coarse-ribbed Pachydiscid ammonite genus from the Upper Cretaceous, found in Coniacian to Campanian age strata in Europe, Madagascar, Japan, and British Columbia.

The whorl section in ''Eupachydiscus'' is inflated and depressed, almost round in the later growth stages. Ribs are narrow but prominent in the early whorls, becoming thick and strong in the later.

''Eupachydiscus'' is distinct from the mostly later, Campanian - Maastrichtian, compressed and high-whorled ''Pachydiscus'', but somewhat similar to the coeval, inflated and coarse ribbed, Coniacian-Santonian, ''Pachydiscoides''.

==Species== * ''Eupachydiscus isculensis'' † Redtenbacher 1873 * ''Eupachydiscus macoveii'' † Szaisz 1981 * ''Eupachydiscus pseudogrossouvrei'' † Collignon 1955

==References== Treatise on Invertebrate Paleontology, Part L, Mollusca 4, R.C. Moore, ed. Geological Soc. of America and Univ. Kansas Press. p L377-L380.

[https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=82577 Paleodb-Pachydiscidae] 5/01/11 {{Taxonbar|from=Q5409879}}

Category:Cretaceous ammonites Category:Ammonites of Europe Category:Desmoceratoidea Category:Ammonitida genera

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