There is one species of spider.
Spider . They are the largest order of arachnids and rank seventh in total species diversity among all other orders of organisms . , at least 45,700 spider species , and 113 families have been recorded by taxonomists . A herbivorous species , Bagheera kiplingi , was described in 2008 , but all other known species are predators , mostly preying on insects and on other spiders , although a few large species also take birds and lizards .