This paper presents the recent find in the Biebrza Valley in Poland of a population of Viviparus contectus (Millet, 1813) showing flavism of the body. Taxonomical and ecological data are compared to the literature. Observations on the colour and behaviour of two specimens are described. The main characteristics of colour formation in molluscs is reviewed. The yellow colour is apparently caused by an inherited lack of melanins. The find is compared to other records of molluscs with albinism or flavism.

Basteria

CC BY-NC 4.0 NL ("Naamsvermelding-NietCommercieel")

Nederlandse Malacologische Vereniging

C.J.P.J. Margry, & J.J.M.M. van Ooijen. (2011). Flavism in Viviparus contectus (Millet, 1813) (Gastropoda, Architaenioglossa, Viviparidae) in the Biebrza region in Poland. Basteria, 75(1/3), 51–54.