Re-examination of strains formerly assigned to Hyphopichia burtonii, the phylogeny of the genus Hyphopichia, and the description of Hyphopichia pseudoburtonii sp. nov

On the basis of the nucleotide divergence in the internal transcribed spacer (ITS) domain of the rRNA gene and the D1/D2 domain of the 26S rRNA gene, species of the genus Hyphopichia can be divided into different phylogenetic groups. In this study, three distinct phylogenetic clusters as well as a novel species, Hyphopichia pseudoburtonii sp. nov. with type strain CBS 2455(T) (=JCM 16346(T)), are introduced. Mating studies indicate that strains belonging to Hyphopichia pseudoburtonii are heterothallic.