A new species of <i>Maomingosuchus</i> from the Eocene of the Na Duong Basin (northern Vietnam) sheds new light on the phylogenetic relationship of tomistomine crocodylians and their dispersal from Europe to Asia

Maomingosuchus acutirostris sp. nov. is a new tomistomine crocodile from the middle–upper Eocene deposits (late Bartonian–Priabonian age, 39–35 Ma) of Na Duong Basin in northern Vietnam. M. can be differentiated type species petrolicus by having an acute anterior tip premaxilla. Both differ another Krabi (Thailand) differences surangular–dentary suture and maxillary alveoli. According to our phylogenetic results, seems sister group + Krabi-Maomingosuchus. The close relationship between those three tomistomines supported present analysis synapomorphies. In analysis, was retrieved basal position forming Paratomistoma Gavialosuchus Melitosaurus Tomistoma, including extant Tomistoma schlegelii. This phylogeny indicates different dispersal events Tomistominae Europe towards eastern Asia: 1) for stem lineage Maomingosuchus, no later than late Eocene; 2) Penghusuchus pani Toyotamaphimeia machikanensis, early–middle Miocene; (3) T. schlegelii, during Neogene.http://zoobank.org/urn:lsid:zoobank.org:pub:19B27C1E-0A3F-4425-AA8C-F904277DF327