Promecognathus
# Promecognathus

Promecognathus is a genus of ground beetles in the family Carabidae. There are at least two described species in Promecognathus. Both species of Promecognathus are known to predate upon Xystocheir dissecta, which is a species of flat-backed millipede that produces cyanide as a chemical defense. The beetles do not avoid exposure to the defense, meaning they are likely physically resistant to cyanide.

## Species

These two species belong to the genus Promecognathus:

* Promecognathus crassus LeConte, 1868
* Promecognathus laevissimus (Dejean, 1829)
