Family Percnidae Števčić 2005 (crab)
Malacostraca - Decapoda - Percnidae
Parent taxon: Grapsoidea according to C. E. Schweitzer et al. 2023
See also Ceccon and de Angeli 2019
Sister taxa: Daragrapsus, Daranyia, Gecarcinidae, Glyptograpsidae, Grapsidae, Plagusiidae, Pseudodaranyia, Sesarmidae, Varunidae, Xenograpsidae
Subtaxa: Percnon
Type: Percnon
Ecology: infaunal detritivore
Distribution: found only at Sant’Urbano (Miocene of Italy)