Abstract
The taxonomy of Fasciosminthurus (Collembola, Symphypleona, Bourletiellidae) is reviewed. Two Fasciosminthurus species are redescribed, F. sauteri (Nayrolles & Lienhard, 1990) and F. virgulatus (Skorikow, 1899), and two new species, F. saportae sp. n. and F. pseudovirgulatus sp. n., are described. Fasciosminthurus virgulatus and F. pseudovirgulatus display similar colour patterns. They can be distinguished by presence vs absence of a pair of flecks on the head and chaetotaxy of the third antennal segment. A key to species and comments on taxonomic characters and biogeography are provided. It is proposed that F. virgulatus and F. pseudovirgulatus sp. n. are allopatric sister species.
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