PulexPulex is a genus of fleas. It comprises seven species. One is the human flea, and five of the others are confined to the Nearctic and Neotropical realms.SpeciesEncyclopedia of Life lists seven species:Pulex alvarezi Barrera, 1955Pulex echidnophagoides Pulex irritans Linnaeus, 1758Pulex larimerius Lewis et Grimaldi, 1997Pulex porcinus Jordan et Rothschild, 1923Pulex simulans Baker, 1895Pulex sinoculus Traub, 1950