Gibbifer californicus (Lacordaire 1842)

Larvae and adults live in forests where they are associated with fruiting bodies of lignicolous basidiomycete fungi.

Gibbifer californicus is a conspicuous, grey to bright blue beetle common in mid- to high elevation forests in southwestern North America and Northern Mexico. Both larvae and adults feed on wood-rotting fungi such as Pleurotus ostreatus and Fomitopsis pinicola.

Adult beetles are fairly large, about 1.5 cm long. Their body is black, except for the elytra which are of a light color ranging from a bright, purplish blue to a dull grey. The elyra are covered with shallow black punctures, which blend into a large, black, lateral spot near the middle of each elytron.

Females lay eggs near the host fungi growing on diseased trees or decaying wood. When the larvae hatch, they feed on these fungi until they are mature. Pupation usually occurs on the underside of a log. The larva attaches its posterior end to the log, and the larval cuticula splits open dorsally. However, the exuvia is not entirely shed and continues to cover the posterior half of the pupa's abdomen.

Cypherotylus californicus, sometimes known as the blue fungus beetle or blue pleasing fungus beetle, is a species of pleasing fungus beetle in the family Erotylidae. It is recorded from Wyoming, Colorado, New Mexico, Arizona, California, Kansas, and the Mexican state of Sonora.