Petralycus Grandjean, 1943

Type species: Petralycus unicornis Grandjean, 1943 from Périgueux, France; by original designation .

Differential diagnosis. The genus can be segregated from the other genera of Alycidae and most of the Endeostigmata by their prodorsum with less than six pairs of fundamental setae i.e. the pair of setae exp is absent, the anterior pair of prodorsal sensilla being globular, and the tapering naso.

Remark. Petralycus longicornis Theron, 1977 and Petralycus brevicornis Theron, 1977 from South Africa are redescribed in accordance with other species diagnoses herein.