Stysiana Grazia, Fernandes & Schwertner, 1999

The genus can be recognized by having the body dorsally depressed; the mandibular plates in a higher level than the clypeus in lateral view; the labial segment II almost as long as III and IV together; and the inferior layer of the ventral rim of the pygophore with a pair of tooth-like projections (Grazia et al. 1999).