Alligatorine phylogeny and the status ofAllognathosuchusMook, 1921

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Abstract
Whether the extinct crocodylians given the name Allognathosuchus represent a monophyletic assemblage remains controversial, and some have argued that Wannaganosuchus brachymanus Erickson, 1982 is a form of Allognathosuchus. A revised phylogenetic analysis supports a set of relationships in which the type species of Allognathosuchus (A. polyodon) is closer to Alligator than it is to European “Allognathosuchus” or “Allognathosuchus” from the North American Paleocene, and a close relationship between Allognathosuchus and Wannaganosuchus is not supported. One European fossil assigned to Allognathosuchus, A. woutersi, is similar (and possibly referable) to Diplocynodon. Chrysochampsa mlynarskii can be distinguished from all other Early Tertiary alligatoroids, but its relationships to other members of the clade (and whether it should be placed within Allognathosuchus) are unclear. These results support multiple dispersal events of alligatorines from North America to Eurasia, and suggest that the crania...