These are the Waitomo glow caves in New Zealand, and they’re named for the glowworms that inhabit them, Arachnocampa luminosa. The glowworms are endemic to New Zealand, and are around the size of an average mosquito. The walls of the caves are covered with a mushroom like fungi related to the genus Pleurotus. Albino cave ants and weta (giant crickets) also inhabit this cave system.
Arachnocampa is a genus of four fungus gnat species which have a luminescent larval stage, akin to the larval stage of glowworm beetles. The species of Arachnocampa are endemic to New Zealand and Australia, dwelling in caves and grottos, or sheltered places in forests.
A previous synonym was “Bolitiphila,” meaning “mushroom lover,” in the past. The name was changed in 1924 to Arachnocampa, meaning “spider-worm,” for the way the larvae hang sticky silk threads to ensnare prey. The genus Arachnocampa belongs in the family Keroplatidae.