Annotated checklist of Iranian Hydrophilidae (Coleoptera: Polyphaga: Hydrophiloidea)

This checklist comprises all species of Hydrophilidae (Coleoptera: Hydrophiloidea) quoted in the literature referring to Iran and confirmed by our study. In total, 104 species within 17 genera and five subfamilies, Hydrophilinae (eight genera, 63 species), Chaetarthriinae (three genera, five species), Enochrinae (single genus, 20 species), Acidocerinae (single genus, three species) and Sphaeridiinae (four genera, 13 species), are listed for the fauna of Iran. Three species are endemic; four species are recorded here for the first time from Iran, and nine species are excluded from Iranian fauna.