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TaxNo: 6937Subgenus Auritoclymenia
Suborder: Tornoceratina
Superfamily: Dimeroceratoidea
Family: Phenacoceratidae
Genus: Cycloclymenia
Subgenus: Auritoclymenia
Qualifier: gs
Author: Sun & Shen 1965,p.63
Lower Boundary: UD5C--UD6A1: Sphenoclym.brevispina base, 364 million years
Upper Boundary: UD6E--UD6F:Cym.nigra--A.prorsum [19,40], 360 million years