Rathbun, M.J. (1913). Descriptions of new species of crabs of the families Grapsidae and Ocypodidae. <em>Proceedings of the United States National Museum.</em> 46(2030): 353-358, pls. 30-33., available online athttps://doi.org/10.5479/si.00963801.46-2030.353[details]
DecaNet eds. (2025). DecaNet. Ptychognathus johannae Rathbun, 1913. Accessed through: Odido, M.; Appeltans, W.; BelHassen, M.; Mussai, P.; Nsiangango, S.E.; Vandepitte, L.; Wambiji, N.; Zamouri, N. Jiddou, A.M. (Eds) (2025) African Register of Marine Species at: https://www.marinespecies.org/afremas/aphia.php?p=taxdetails&id=444813 on 2026-09-06
Odido, M.; Appeltans, W.; BelHassen, M.; Mussai, P.; Nsiangango, S.E.; Vandepitte, L.; Wambiji, N.; Zamouri, N. Jiddou, A.M. (Eds) (2026). African Register of Marine Species. Ptychognathus johannae Rathbun, 1913. Accessed at: https://marinespecies.org/afremas/aphia.php?p=taxdetails&id=444813 on 2026-09-06
original descriptionRathbun, M.J. (1913). Descriptions of new species of crabs of the families Grapsidae and Ocypodidae. <em>Proceedings of the United States National Museum.</em> 46(2030): 353-358, pls. 30-33., available online athttps://doi.org/10.5479/si.00963801.46-2030.353[details]
Present Inaccurate Introduced: alien Containing type locality