Reis, J. & R. Araujo. 2009. Redescription of Unio tumidiformis Castro, 1885 (Bivalvia, Unionidae), an endemism from the south-western Iberian Peninsula. Journal of Natural History 43: 1929-1945. Available electronically.
+ Unio sadoicus da Silva e Castro, 1885
+ Unio macropygus da Silva e Castro, 1885
+ Unio eupygus da Silva e Castro, 1885
+ Unio baeticus Kobelt, 1888
+ Unio conimbricus Kobelt, 1893
+ Unio callipygus Drouët, 1893