Allanson, B. R. (1958). On the systematics and distribution of the molluscan genus Siphonaria in South Africa. <em>Hydrobiologia.</em> 12: 149-180. page(s): 171, pl. III, IV, figs. 8, 17 [details]
MolluscaBase eds. (2021). MolluscaBase. Siphonaria (Siphonaria) aspera var. pallida Allanson, 1958. Accessed at: https://www.molluscabase.org/aphia.php?p=taxdetails&id=1384505 on 2024-03-29
original descriptionAllanson, B. R. (1958). On the systematics and distribution of the molluscan genus Siphonaria in South Africa. <em>Hydrobiologia.</em> 12: 149-180. page(s): 171, pl. III, IV, figs. 8, 17 [details]
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