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Leptographium sinoprocerum sp. nov., an undescribed species associated with Pinus tabuliformis-Dendroctonus valens in northern China

     Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing, 100091, China

Cony Decock

     Université catholique de Louvain, Mycothèque de l’Université catholique de Louvain (MUCL¹, MBLA), Croix du Sud 6/3, B-1348 Louvain-la-Neuve, Belgium

Xing Yao Zhang ²

     Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing, 100091, China

Henri Maraite

     Université catholique de Louvain, Unité de, Phytopathologie (FYMY), Croix du Sud 2/3, B-1348 Louvain-la-Neuve, Belgium

During a study of ophiostomatoid fungi associated with the invasive pest Dendroctonus valens in the Pinus tabuliformis ecosystem in northern China, a multigenic (ITS2-LSU, β-tubulin and EF1-) phylogenetic analysis and examination of morphological features revealed in addition to Leptographium procerum the occurrence of an undescribed species. The new species, Leptographium sinoprocerum, belongs to the L. procerum-L. profanum clade. Both L. procerum and L. sinoprocerum are similar to each other and occur sympatrically in the ecosystem studied. Nevertheless L. sinoprocerum can be distinguished from L. procerum by shorter conidiophore stipes arising from both submerged and aerial hyphae, slightly more oblong conidia, a granular ornamentation on the submerged hyphae and dark olivaceous colonies on MEA.

Key words: elongation factor 1-, ITS2-LSU, Leptographium procerum, ophiostomatoid fungi, phylogeny, β-tubulin