Zospeum tholussum was discovered at depths of 743 to 1,392 m (2,438 to 4,567 ft) in the Lukina jama–Trojama cave system in Croatia in 2012 during a caving expedition.
Zospeum tholussum ditemukan di kedalaman 743 hingga 1.392 m (2.438 hingga 4.567 kaki) di gua Lukina jama–Trojama, Kroasia, pada tahun 2012 selama ekspedisi di gua.