Two new species of Sminthurididae (Hexapoda, Collembola, Symphypleona) from Brazil with notes on Folsom & Mills and Sphaeridia Linnaniemi.

Two new species of Sminthurididae, Medeiros & Bellini, and Silva, Medeiros & Bellini, from Piaui state, Brazil, are herein described and illustrated. resembles species of the group, like Bretfeld & Gauer, Bretfeld & Gauer, and Bretfeld & Schulz, by its complex male ventral tube without asymmetrical structures or medial process. However, it differs from them by the combination of the male tibiotarsus III with a leaf-shaped IIpe chaeta and a regular IIIpi chaeta, ventral tube with 1+1 chaetae, and the absence cuticular hooks on the furca.