The Thyropygus bifurcus subgroup

A subgroup of the T. allevatus group, characterized by 1. An additional projection on the anterior coxal fold 2. A doubled femoral spine (exception: T. casjeekeli n. sp., and quadricuspis n. sp., which have a single femoral spine)

3. No spatulate lobe on the telopodite

4. A longitudinal rounded crest near tip of palette

The T. bifurcus subgroup includes T. bifurcus (Demange, 1986), T. enghoffi (Demange, 1989), and 4 new species; T. casjeekeli n. sp., T. demangei n. sp., T. quadricuspis n. sp., and T. richardhoffmani n. sp. The species within this subgroup not only share the diagnostic characters listed above but also many other characters.