Ogataea haglerorum sp. nov., a novel member of the species complex, Ogataea (Hansenula) polymorpha.

Three strains representing a novel species of the Ogataea clade were isolated by W. T. Starmer and H. J. Phaff from rotting tissue of Opuntia phaeacantha in Arizona, USA. Analyses of the sequences of the D1/D2 LSU rRNA gene, ITS1-5.8S-ITS2, and translation elongation factor-1α (EF-1 α) showed that this novel species belongs to the Ogataea polymorpha complex formed by Ogataea angusta, Ogataea parapolymorpha and Ogataea polymorpha. The novel species differs from these species by 4-5 nucleotide substitutions in the D1/D2 domain, by 28-29 nucleotide substitutions in the EF-α gene and by 18-24 nucleotide substitutions and 2-5 indels in the ITS-5.8S region. The name Ogataea haglerorum sp. nov. is proposed for this novel species. The type strain is VKPM Y-2583T (=CBS 14645T=UCDFST 17-101T). The Mycobank number is MB 819772.