The members in this very small family, which includes only one genus and 7 species [Updated 29.06.26], were orginally placed in the Chactidae. In a revision in 1992, they were placed in the family Superstitioniidae. Later, they were placed in a new family, the Troglotayosicidae, by Lourenco. Soleglad & Fet (2003) transfered the genus Belisarius to Chactidae and the genus Troglotayosicus to Superstitionidae. This desicion was challenged by Prendini & Wheeler, 2005, but upheld by Fet & Soleglad, 2005. The Scorpion Files has so far followed the systematics of the latest published work, but because several authors lately are using Troglotayosicidae in their works on Belisarius and Troglotayosicus, I've chosen to reinstate Troglotayosicidae in The Scorpion Files' species list. Hopefully, future studies will be able to conclude on the correct taxonomic position for these enigmatic scorpions.

Prendini (2026) confirms the family status for now, but states that this taxa may be recognized as a subfamily of Chactidae Pocok, 1893 in the future.

02.03.20: The genus Belisarius has been moved to the family Belisariidae Lourenco, 1998.

The species in this family are are either cavernicolous (cave dwelling species) or living in areas just outside caves, but all have troglomorphies like loss or reduction of eyes, depigmentation and appendage attenuation. Some species are found among leaf litter in montane forests. Troglotayosicids are found in Ecuador and Colombia in South America.

No scorpions in this family have been reported to occur in captivity.

No data have been found about the venom of these scorpions, but they are probably harmless.

SPECIES FILES:
This list of genera and species is based on Prendini (2026) and will be updated with new taxonomic decisions as soon as possible. The list was originally created from Fet et al.(2000). Subspecies is not included in the list. I try to update the list as additions and changes are published. * denotes changes after Fet et al. (2000). I will be grateful for information about new development in the taxonomy of this family. For information about synonyms and bibliographies, see Fet et al. (2000)