Lipomyces starkeyi is known to be associated with three strains-cluste
rs showing high mutual nDNA reassociation within each cluster, but whi
ch reassociate ambiguously with the type of L. starkeyi. Representativ
e strains of L. starkeyi and Cluster a were examined for possible gene
tic exchange by the prototrophic selection technique. Since no genetic
recombination was detected, the strains are presumed to be geneticall
y isolated. Cluster ct is consequently assigned to the rank of species
as Lipomyces mesembrius. A description of the new species is given. L
ipomyces kononenkoae ssp. spencermartinsiae has been raised to the ran
k of species as L. spencermartinsiae.