Winter, A. J. de. (2008). Redefinition of Thapsia Albers, 1860, and description of three more helicarionoid genera from western Africa (Gastropoda, Stylommatophora). Zoologische Mededelingen 82(41): 441–477.
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Winter, A. J. de
2008
Redefinition of <i>Thapsia</i> Albers, 1860, and description of three more helicarionoid genera from western Africa (Gastropoda, Stylommatophora)