Prodromus Systematis Hydrachnidarum. 



Autore Sig Thor. 



Familiae Hydrachnidarum Gerstaecker (1863). 



I. Familia: Limnocharidae Kramer (1877). 



Genus: 1. Limnochares Latreille (1796). 



II. Familia: Eylaïdae Kramer (1877). 



Genera: 2. Piersigia Protz (1896). 

 3. Eylaïs Latreille (1796). 



III. Familia: Hydryphantidae Piersig (1896). 



(= Subfamilia Hydryphantinae Piersig). 



Genera: 4. Diplodontus Dugès (1834). 



5. Eiipatra Koenike (1896). 



6. Partnunia Piersig (1897). 



7. Protzia Piersig (1896). 



8. Tyrrellia Koenike (1895). 



9. Thyopsis Piersig (1898). 



10. Panisus Koenike (1896). 



11. Zschokkea Koenike (1892). 



12. Thyas Koch (1835). 



