MolluscaBase eds. (2021). MolluscaBase. Vexillum (Costellaria) subquadratum (G. B. Sowerby II, 1874). Accessed through: Odido, M.; Appeltans, W.; BelHassen, M.; Mussai, P.; Nsiangango, S.E.; Vandepitte, L.; Wambiji, N.; Zamouri, N. Jiddou, A.M. (Eds) (2021) African Register of Marine Species at: http://marinespecies.org/afremas/aphia.php?p=taxdetails&id=416782 on 2024-04-26
Odido, M.; Appeltans, W.; BelHassen, M.; Mussai, P.; Nsiangango, S.E.; Vandepitte, L.; Wambiji, N.; Zamouri, N. Jiddou, A.M. (Eds) (2024). African Register of Marine Species. Vexillum (Costellaria) subquadratum (G. B. Sowerby II, 1874). Accessed at: https://marinespecies.org/afremas/aphia.php?p=taxdetails&id=416782 on 2024-04-26
basis of recordTurner H. (2001) <i>Katalog der Familie Costellariidae Macdonald 1860 (Gastropoda: Prosobranchia: Muricoidea)</i>. Hackenheim: Conchbooks. 100 pp. page(s): 62 [details]