Spelaeogriphacea

Spelaeogriphacea is an order of crustaceans that grow to no more than 10 mm. Little is known about the ecology of the order.

Only four species, all subterranean, have been described. Of the three genera, Potiicoara  is known only from a cave in Brazil's Mato Grosso, Spelaeogriphus  only from a cave on Table Mountain in South Africa, and the two Mangkurtu  species only from individual Australian aquifers. Fossils of the group are known from the Early Carboniferous of Canada (Acadiocaris) and the Early Cretaceous of Spain (Spinogriphus, Las Hoyas) and China (Liaoningogriphus, Yixian Formation), which are assigned to the family Acadiocarididae.