Abstract
Three named species of Armillaria are currently recognised as occurring in New Zealand: Armillaria novae-zelandiae (G. Stev.) Herink, A. limonea (G. Stev.) Boesew. and Armillaria hinnulea Kile & Watling. A fourth species (Armillaria sp. nov.) has been collected in New Zealand over a period of 30 years but has not yet been named. Maximum likelihood analysis, using DNA sequence data from the internal transcribed spacer region (ITS) of the ribosomal DNA repeat, DNA sequencing of the elongation factor 1-α gene, cultural pairing studies and morphological examination were undertaken to confirm the novelty of Armillaria sp. nov. as a distinct species. Armillaria sp. nov. is distinguished by the morphology of the fresh basidiocarp, cultural interfertility tests with other Armillaria species and DNA sequence data. Armillaria sp. nov. is here formally named Armillaria aotearoa.
Highlights
Three named species of Armillaria are currently recognised as occurring in New Zealand: Armillaria novae-zelandiae
The maximum likelihood analysis indicated that A. sp. nov. had the lowest degree of intraspecific variation, while the analysis showed a higher degree of intraspecific variation within the other three species which had statistically supported sub-clades (Fig. 1)
Minor variation was observed within internal transcribed spacer region (ITS)-1 and ITS-2 regions of the seven isolates from cultures of A. sp. nov. that were sequenced in this study
Summary
Three named species of Armillaria are currently recognised as occurring in New Zealand: Armillaria novae-zelandiae Nov.) has been collected in New Zealand over a period of 30 years but has not yet been named. Four species of Armillaria are known in New Zealand: Armillaria novae-zelandiae Stev.) Boesew.; Armillaria hinnulea Kile & Watling; and Armillaria sp. Armillaria novae-zelandiae and A. limonea were described 50 years ago under the genus name Armillariella (Stevenson 1964). Both are morphologically distinctive, pathogenic to introduced and sometimes native trees and shrubs and widely distributed in New Zealand (Gadgil 2005).
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