Author: Jan Scholten
Members: 29 species.
Clades: Calostomataceae; Sclerodermatineae.
Region: worldwide, eastern North America, Asia, Australasia.
Habitat: deciduous, temperate, tropical or subtropical forests.
Fungus; gasteroid; enclosed spore-bearing structures; symbiotic; ectomycorrhizal with oak.
Fruit body: bright orange to red; round; gelatinous puffballs on thick stalks; openings resemble lips.
Calostoma has historically led to various classification schemes to other puffball or stomach mushrooms. Phylogenetic analyses show the genus to be evolutionarily related to the Bolete mushrooms.