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TaxNo: 1990Arnsbergites gracilis
Suborder: Goniatitina
Superfamily: Goniatitoidea
Family: Goniatitidae
Genus: Arnsbergites
Species: gracilis
Qualifier: ss
Author: Korn 1988,p.101
Lower Boundary: DER Go beta falcatus--Go beta gracilis, 329.1 million years
Upper Boundary: DER Go spirale--Go beta rotundum, 328.6 million years