Abstract
The examination of the holotypes of Hypogastrura parvula Haybach, 1972 and Orogastrura parva (Gisin, 1949) revealed that they are conspecific, resulting in the synonymization of the former with the latter. The similar, but poorly known, species H. exigua Gisin, 1958 and H. oreophila Butschek, 1948 from the Alps have been redescribed. Three main evolutionary lineages: ceratophysellan, hypogastruran and xenyllan, are distinguished within the col-lembolan family Hypogastruridae (Thibaud et al. 2004). Each lineage comprises species evolving by reduction of eyes and furca. In spite of the low phylogenetic value of these regressive features, the species were assembled into genera of uncertain monophyly.
NSTL