Lycosa erythrognatha

Lycosa erythrognatha is a species of spider from the genus Lycosa. The species was originally described in 1836. It is the only spider known to feed on Rhinella ornata.

Venom

Beginning in the 1920s, the venom of this species has been erroneously reported to cause necrosis in humans, based on undocumented clinical observations; careful empirical studies revealed that none of over 500 confirmed bites from this spider resulted in a necrotic wound.