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TaxNo: 5983Aldanoceras tenue+
Suborder: Paraceltitina
Superfamily: Xenodiscoidea
Family: Xenodiscidae
Genus: Aldanoceras
Species: tenue+
Qualifier: ss
Author: Dagis & Ermakova 1996,p.405
Lower Boundary: Permian--Triassic (Induan base), 251 million years
Upper Boundary: Griesbachian--Dienerian [GRI--DIE], 250.3 million years