MolluscaBase eds. (2021). MolluscaBase. Fusus propinquus var. howsei J. T. Marshall, 1902. 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=752430 on 2025-05-07
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2025). European Register of Marine Species. Fusus propinquus var. howsei J. T. Marshall, 1902. Accessed at: http://www.marbef.org//www.marbef.org/data/aphia.php?p=taxdetails&id=752430 on 2025-05-07
context source (Deepsea)Gofas, S.; Luque, Á. A.; Templado, J.; Salas, C. (2017). A national checklist of marine Mollusca in Spanish waters. Scientia Marina. 81(2) : 241-254, and supplementary online material., available online athttps://doi.org/10.3989/scimar.04543.21a[details]