Cryptocercus is a genus of Dictyoptera (cockroaches and allies) in the family Polyphagidae. It was earlier placed in a family of its own, the Cryptocercidae, of which this genus was the only member. Species are known as wood roaches or brown-hooded cockroaches.
They are subsocial xylophagous insects, found in North America and Asia. There are 9 known species.
Cryptocercus is especially notable for sharing numerous characteristics with termites, and phylogenetic studies have shown this genus is more closely related to termites than it is to other cockroaches. Cryptocercus sp., apart from having a common ancestor with termites, have been placed within the Polyphagidae based on molecular analysis, and they are even closer relatives of Therea sp. 
- ^ (Grandcolas, 1996 and later) incomplete citation.
- Nalepa, C.A., Byers, G.W., Bandi, C. and Sironi, M. 1997. "Description of Cryptocercus clevelandi from the Northwestern United States, molecular analysis of bacterial symbionts in its fat body and notes on biology, distribution and biogeography." Ann. Entomol. Soc. Amer. 90:416-424.
- Burnside, C.A., P.T. Smith and S. Kambhampati, 1999. "Three New Species of the Wood Roach, Cryptocercus (Blattodea: Cryptocercidae), from the Eastern United States." The World Wide Web Journal of Biology 4:1