North American Mammalian Paleofaunal Database - Very comprehensive database on all fossil North American mammal localities and faunas. Link to systematics database with systematic, phylogenetic and body mass data of mammals.

Dinobase - Dinosaur database with comprehensive taxonomic listing, phylogentic information and impressive pictures.

Faunmap - Electronic database for the late Quaternary distribution of mammal species in the United States. Illinois State Museum.

Tetrapods - Fossil tetrapod families