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TaxNo: 5331Family Marathonitidae
Suborder: Goniatitina
Superfamily: Marathonitoidea
Family: Marathonitidae
Qualifier: fa
Author: Ruzhencev 1938,p.254
Lower Boundary: RUS Miachkovian--Zhigulian [MYA--ZHI], 306.5 million years
Upper Boundary: RIT Amarassi beds top, 258 million years