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TaxNo: 5985Tompophiceras gracile
Suborder: Paraceltitina
Superfamily: Xenodiscoidea
Family: Xenodiscidae
Genus: Tompophiceras
Species: gracile
Qualifier: ss
Author: Spath 1930,p.34
Lower Boundary: Permian--Triassic (Induan base), 251 million years
Upper Boundary: Griesbachian--Dienerian [GRI--DIE], 250.3 million years