Bock, P. (2021). World List of Bryozoa. Heterotrypa praenuntia (Ulrich, 1893) †. Accessed through: Marine Species Traits editorial board (2021) Marine Species Traits at: http://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1411502 on 2024-06-07
Marine Species Traits editorial board (2024). Marine Species Traits. Heterotrypa praenuntia (Ulrich, 1893) †. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=1411502 on 2024-06-07