Hydraena subgen. Phothydraena Kuwert 1888

Phothydraena inclui 9 filhos:

• Hydraena (Phothydraena) atrata Desbrochers des Loges 1891
• Hydraena (Phothydraena) chersonesica Jäch, Díaz & Przewoźny 2007
• Hydraena (Phothydraena) hernandoi Fresneda & Lagar 1990
• Hydraena (Phothydraena) isabelae Castro & Herrera 2001
• Hydraena (Phothydraena) paganettii Ganglbauer 1901
• Hydraena (Phothydraena) pallidula Sainte-Claire Deville 1909
• Hydraena (Phothydraena) putearius Jäch & Díaz 2000
• Hydraena (Phothydraena) serricollis Wollaston 1864
• Hydraena (Phothydraena) testacea Curtis 1830
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