Mesogyrus is an extinct genus of fossil beetles in the family Gyrinidae, containing the following species:
- â Mesogyrus anglicus <small>Ponomarenko et al. 2005</small> Durlston Formation, United Kingdom, Berriasian
- â Mesogyrus antiquus <small>Ponomarenko, 1973</small> Karabastau Formation, Kazakhstan, Oxfordian
- â Mesogyrus elongates <small>Ponomarenko 2014</small> Sharteg, Mongolia, Tithonian
- â Mesogyrus sibiricus <small>Ponomarenko, 1985</small> Abasheva Formation, Russia, Pliensbachian
- â Mesogyrus striatus <small>Ponomarenko, 1973</small> Byankinskaya Formation, Russia, Tithonian Daya Formation, Russia Hauterivian Turga Formation, Russia, Aptian
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