Porhydrus is a genus of beetles in the family Dytiscidae, containing the following species:Dytiscidae Species List at Joel Hallan's Biology Catalog. Texas A&M University. Retrieved on 7 May 2012.
Porhydrus genei (Aubé, 1838) Porhydrus lineatus (Fabricius, 1775) Porhydrus obliquesignatus (Bielz, 1852) Porhydrus vicinus (Aubé, 1838)
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