Меловой период

Fischer V., Arkhangelsky M.S., Naish d., Stenshin I.M., Uspensky G.N., Godefroit P. (2014) Simbirskiasaurus and Pervushovisaurus reassessed: implications for the taxonomy and cranial osteology of Cretaceous platypterygiine ichthyosaurs // Zoological Journal of the Linnean Society, 2014, 171, 822–841. With 11 figures
http://cretaceous.ru/pub/~/id/2538