The latest two publications from our work on groundwater treat taxonomic questions on Niphargus and Haplotaxis. In a first study published in Zoologischer Anzeiger, we used molecular methods to review the taxonomic status of the Niphargus ruffoi clade, including the species N. ruffoi and Niphargus arolaensis, across the Alpine arc. In another study published in Zoosymposia, we questioned the supposedly sub-cosmopolitan species status of Haplotaxis gordioides, with our results suggesting that the species is a complex of at least 6 cryptic species in Switzerland.