''Comaldessus stygius'' is a species of

beetle Beetles are insects that form the order Coleoptera (), in the superorder Endopterygota. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 400,000 describ ...

s in the family Dytiscidae, the only species in the genus ''Comaldessus''.Dytiscidae Species List
at Joel Hallan's Biology Catalog. Texas A&M University. Retrieved on 7 May 2012.

References

Dytiscidae genera Monotypic Adephaga genera {{Dytiscidae-stub