MolluscaBase eds. (2024). MolluscaBase.
Ptychotrema (Ennea) chaperi (Jousseaume, 1872). Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://www.marinespecies.org/traits./aphia.php?p=taxdetails&id=1304997 on 2024-05-02
Marine Species Traits editorial board (2024). Marine Species Traits.
Ptychotrema (Ennea) chaperi (Jousseaume, 1872). Accessed at: https://www.marinespecies.org/traits./aphia.php?p=taxdetails&id=1304997 on 2024-05-02