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Systematics and phylogeny of higher cretaceous ammonoid taxa

, : Systematics and phylogeny of higher cretaceous ammonoid taxa. Paleontologicheskii Zhurnal (2): 15-32

Ammonoid species (111) belonging to 70 genera of all the 14 superfamilies were studied using the ontogenetic method. A phylogenetic scheme and a system were presented for this group of ammonoids of the Early and Late Cretaceous. They were classified under 3 orders: Phyloceratida (Phylocerataceae) with a monomorphic shell; Lytoceratida with a monomorphic shell (Lytocerataceae and Tetragonitaceae) and a heteromorphic shell (Turrilitaceae and Scaphitaceae); Ammonitida with a monomorphic shell (Douvilleicerataceae, Parahoplitaceae, Deshayestaceae, Hoplitaceae, Stephanocerataceae, Perisphinctaceae, Haplocerataceae, Desmocerataceae) and with a heteromorphic shell (Ancylocerataceae).

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