WAcanthohoplites
WAivukus
WAraripichthys
WAtrypa
WAxelrodichthys
WBaculites
WBasilemys
WBorophagus hilli
WCalappilia
WCipactlichthys
WCoahuilaceratops
WComposita
WCormohipparion
WCuvieronius
WDakosaurus
WDinohippus
WDouvilleiceras
WGlyptotherium
WGoulmimichthys
WHemiauchenia
WHindeodus
WHolmesina
WHuehuecanauhtlus
WHuehuecuetzpalli
WLabocania
WLeptaena
WMacroscaphites
WMagnapaulia
WMaledictosuchus
WMauriciosaurus
WMegalonyx
WMexican amber
WMixotoxodon
WNeocomites
WNotelops
WNothrotherium
WNummulite
WOlenellus
WOphthalmosaurus
WOrthaspidoceras
WParamylodon
WParatoceras
WPlanolites
WPlatygonus
WPraekogia
WPrismatoolithus
WRequienia (bivalve)
WSilesites
WSphenodiscus
WTorvoneustes
WVelafrons
WVeridagon
WVinctifer
WYehuecauhceratops