Allocordyceps

Allocordyceps is a genus of parasitic fungus in the order Hypocreales that parasitizes carpenter ants. The fossil of Allocordyceps represents the oldest known fossil of an ant-parasitizing fungus before Ophiocordyceps. The only species within this genus is Allocordyceps baltica.

Description
Allocordyceps is characterized by its ascoma being an orange color, stalked and cusp shaped. It also has a pair of partially immersed perithecia that emerges from its rectum. When parasitized by Allocordyceps, separate stromata with separate mycelium emerge from a carpenter ant's neck and abdomen.