Halacaroidea (Acari, Actinedida) from four lakes of volcanic origin in Lazio (Central Italy)

Abstract
A new species, Copidognathus hepbaestios from the lakes of Bolsena, Vico, Bracciano and Albano (Lazio, central Italy), is described. Porohalacarus alpinus alpinus and Limnohalacarus wackeri wackeri are present in the lakes of Bracciano and Bolsena.