Stimpson W. 1865. On certain genera and families of zoophagous gasteropods. <i>American Journal of Conchology</i>, 1: 55-64, pl. 8-9, available online athttp://biodiversitylibrary.org/page/16084574 page(s): 59 [details]
MolluscaBase eds. (2021). MolluscaBase. Ptychatractus Stimpson, 1865. Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2021) European Register of Marine Species at: http://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=160034 on 2021-04-14
NARMS (2021). Ptychatractus Stimpson, 1865. Accessed at: http://vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=160034 on 2021-04-14
original descriptionStimpson W. 1865. On certain genera and families of zoophagous gasteropods. <i>American Journal of Conchology</i>, 1: 55-64, pl. 8-9, available online athttp://biodiversitylibrary.org/page/16084574 page(s): 59 [details]
Present Inaccurate Introduced: alien Containing type locality