Xu, K.; Agatha, S.; Dolan, J. (2024). World Ciliophora Database.
Protocymatocylis Kofoid & Campbell, 1929. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://marinespecies.org/traits./aphia.php?p=taxdetails&id=341346 on 2024-05-09
Marine Species Traits editorial board (2024). Marine Species Traits.
Protocymatocylis Kofoid & Campbell, 1929. Accessed at: https://marinespecies.org/traits./aphia.php?p=taxdetails&id=341346 on 2024-05-09