Dioon califanoi is a species of cycad that is native to Oaxaca and Puebla states, Mexico. It is found near Teotitlán del Camino and Huautla de Jiménez.
The beetle Pharaxonotha bicolor is in an obligatory mutualistic relationship with Dioon califanoi, living and breeding in male cones and consuming pollen and cone tissues while serving as a pollinating vector by transferring pollen to female cones.