Canadian Forest Service Publications
Tryblidiopsis magnesii sp. nov. from Picea glauca in Eastern Canada. 2019. Tanney, J.B.; Seifert, K.A. Fungal Systematics and Evolution, Volume 4, Number 1, pp. 13-20(8).
Issued by: Pacific Forestry Centre
Catalog ID: 40092
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Tryblidiopsis pinastri (Leotiomycetes, Rhytismatales) was described from Picea abies in Europe and was also thought to occur on North American Picea. However, previously published sequences of Picea foliar endophytes from Eastern Canada suggested the presence of at least two cryptic Tryblidiopsis species, distinct from T. pinastri and other known species. Our subsequent sampling of Tryblidiopsis ascomata from dead attached Picea glauca branches resulted in the collection of a putatively undescribed species previously isolated as a P. glauca endophyte. Morphological evidence combined with phylogenetic analyses based on nuclear ribosomal internal transcribed spacer (ITS) and large subunit ribosomal (LSU) DNA sequences support the distinctiveness of this species, described here as T. magnesia.
Plain Language Summary
This publication describes a novel fungal species, Tryblidiopsis magnesia, isolated from healthy white spruce (Picea glauca) foliage and also collected from self-pruned white spruce branches. The distinction of this species from other known Tryblidiopsis species is supported by DNA sequence analyses and the morphology of the sexual reproductive structures. We found that while Canadian Tryblidiopsis collections are historically identified as T. pinastri (a European species found on Norway spruce), our endemic species are actually distinct, undescribed, and comprise at least two new species. Given that Tryblidiopsis is ubiquitous on spruce branches, this work exemplifies the knowledge gaps relating to fungal biodiversity of Canadian forests and indicates that we should re-examine endemic fungal species known by European names.