Abstract
During a survey of microfungi associated with palms from karst formations, three novel ascomycetes were found from decaying petioles of Trachycarpus fortunei (Arecaceae) in Guizhou, China. Multi-gene phylogenetic analyses based on a combined SSU, ITS, LSU, RPB2 and TEF1α sequence data showed that these collections were affiliated to Brunneofusispora and Neooccultibambusa in the family Occultibambusaceae. A new species Brunneofusispora inclinatiostiola is introduced. It is phylogenetically close to B. clematidis but represents a distinct lineage. Morphologically, it differs from the latter in having immersed ascomata with eccentric, periphysate ostiole and smaller ascospores. Morpho-phylogenetic evidence also revealed two new Neooccultibambusa species, N.kaiyangensis and N. trachycarpi. Together with the generic type N. chiangraiensis, they formed a distinct lineage within the genus Neooccultibambusa. Three novel palmicolous fungi of Occultibambusaceae are described, illustrated and notes on their identification are provided. The ecological significance of the new taxa and the phylogenetic relationship of genera in Occultibambusaceae is discussed.
Highlights
Occultibambusaceae was established by Dai et al [1] and typified by OccultibambusaD.Q
Morphological examination and multi-gene phylogeny based on SSU, ITS, LSU, RPB2 and TEF1α sequence data were carried out to identify these fungi, of which three new Occultibambusaceae species belong to Brunneofusispora and Neooccultibambusa were introduced, respectively
DNA amplification was performed by a polymerase chain reaction (PCR)
Summary
Five genera are accepted in the family, viz. Brunneofusispora S.K. Huang & K.D. Hyde, Neooccultibambusa Doilom & K.D. Hyde, Occultibambusa D.Q. Dai. Versicolorisporium is the genus that only has an asexual morph in the family but is clustered with Occultibambusa in recent phylogenetic studies [2,5,6]. Brunneofusispora was considered to be different because of phylogenetic distinction and the ascomata of the type species have long necks [4]. Neooccultibambusa resembles Occultibambusa, they are phylogenetically distinct, and the former has hyphomycetous asexual morphs or produces chlamydospores in culture [3,8,9,10]. Morphological examination and multi-gene phylogeny based on SSU, ITS, LSU, RPB2 and TEF1α sequence data were carried out to identify these fungi, of which three new Occultibambusaceae species belong to Brunneofusispora and Neooccultibambusa were introduced, respectively
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