The tetrapolarity and multiallelism of Lenzites betulinus are confirmed as established by Vandendries and Brodie in 1932. The genotype of the four compatibility groups is re-attributed after detection by retroconfrontation of heterocaryosis in A=B not-equal confrontations. The phenotypes of interactions between hemi-compatible homocaryons, particularly that of ''sexual barrier'' (A not-equal B=), are redescribed. The hyphothesis of a gazeous production as the agent of mutual sexual repulsion by Vandendries and Brodie is revised as a repulsive pheromone production.
Hennebert, GL., Pascal, S., & Cosyns, M. (1994). [Incompatibility Interactions Between Homocaryons of the Bifactorial Basidiomycete Lenzites-betulinus - a Sexual Repulsive Pheromone]. Cryptogamie Mycologie, 15(2), 83-116. https://hdl.handle.net/2078.5/72863 (Original work published 1994)