Tetrablemmidae, sometimes called armored spiders, is a family of tropical
araneomorphspiders first described by
Octavius Pickard-Cambridge in 1873.[1] It contains 126 described species in 29 genera from southeast Asia, with a few that occur in Africa and Central and
South America.[2]Pacullidae was incorporated into this family in 1981,[3] but was later restored as a separate family in a 2016 phylogenetic study.[4]
Most species have been collected from litter and soil, including that of
epiphytes. Some live in caves and show typical adaptations of cave spiders, such as loss of eyes and weak
sclerotization.[5][6] Members of Tetrablemma only have four eyes,[1] a trait in spiders only found in these and certain members of
Caponiidae.