Ophiocordyceps are famous for their habit of infesting and killing a host insect, typically an ant (here a species of Camponotus). The entomopathogenic fungus manipulates its host to climb to an elevated location and clamp on with its mandibles. The insect then succumbs to a grisly death as fungal bodies break out of the head to disperse spores. However, the fungus itself it not immune: this specimen has itself been infected by a white hyperparasitic fungus! (pers. comm. W.C. Beckerson, 2022)
iNaturalist observation