“…The cave fauna of Brazilian springtails is mainly represented by species of Acherontides Bonet, 1945 [ 6 ] (Poduromorpha); Cyphoderus Nicolet, 1842 [ 7 ], Troglobius Palacios-Vargas and Wilson, 1990 [ 8 ], Trogolaphysa Mills, 1938 [ 9 ], Pseudosinella Schäffer, 1897 [ 10 ], Coecobrya Yosii, 1956 [ 11 ] (Entomobryomorpha); Arrhopalites Börner, 1906 [ 12 ], Pararrhopalites Bonet and Tellez, 1947 [ 13 ] and Keratosminthurus (Symphypleona), summing up more than 40 species [ 2 , 4 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Although many recent efforts aimed to describe the Brazilian cave fauna of Collembola, as in [ 4 , 15 , 16 , 18 , 19 , 21 ], it is noteworthy that most subterranean ecosystems in the country are undersampled for invertebrates in general (including the springtails fauna), especially in the semiarid landscapes. On the other hand, preliminary data supports that the Caatinga, a unique semiarid domain only found in Brazil, can host complex cave systems which shelter a high number of troglomorphic endemic invertebrates, many of them potentially troglobitic [ 22 , 23 ].…”