WAlligatorellus
WAlligatorium
WArchaeopteris
WAsian ostrich
WBathysuchus
WBoavus
WCetotheriopsis
WColosteus
WDaira speciosa
WEophrynus
WGlossochelys
WHyrachyus
WMiocorvus
WOrnithostoma
WPhlegethontia
WSinopa
WSphenodiscus
WStruthiosaurus
WTrogosus
WVolviceramus
WXiphiorhynchus