Fungalpedia -Note 19 Leptoparies
Leptoparies A. Hashim., K. Hiray. & Kaz. Tanaka
Index Fungorum number: IF823138; Facesoffungi number: FoF 08278; Fig. 1
Hashimoto et al. (2018) re-evaluated the Lophiostoma bipolare complexes within Lophiostomataceae (Pleosporales) using molecular data from nuclear rDNA of SSU, ITS, LSU, TUB, tef1, and rpb2 loci. The validation revealed an interspecific variation within species that have similar morphology to Lo. bipolare. Leptoparies was formerly treated as Lo. bipolare-5 (personal code, KT 1653) and the strains formed a distinct clade from Lo. bipolare sensu stricto, thus the taxonomic novelty was introduced to accommodate the segregated strain as Leptoparies. In total, two species L. magnoliae and L. palmarum (type species) have been reported (de Silva et al. 2022). Leptoparies taxa are characterized by short slit-like ostioles on the host surface, without a clypeus, a thin peridium composed of rectangular cells, lacking brown hyphae at the outer part of peridium, anastomosed pseudoparaphyses, cylindrical-clavate asci with knob-like pedicels, and fusiform, hyaline ascospores with a polar sheath presence of the internal chamber or inner spine structure at both ends (Hashimoto et al. 2018; de Silva et al. 2022). The taxa were reported as saprobes from terrestrial Arecaceae and Magnoliaceae (Hashimoto et al. 2018; de Silva et al. 2022).
Type species: Leptoparies palmarum A. Hashim., K. Hiray. & Kaz. Tanaka
Fig 1. Leptoparies taxa a–d. Appearance of ascomata on host surface (c, d slit-like ostiolar neck visible on the surface of substrate) e, f. Vertical section through ascoma. g. Ostiolar canal. h, i. Section of peridium. j. Pseudoparaphyses. k, l. Asci. m–p. Ascospores (o stained with black-blue ink). (a, c, e, i, j, l, m–o from Leptoparies palmarum HHUF 28983 (holotype); b, d, f, g, h, k, p from Leptoparies magnoliae MFLU 18–1291 (holotype)). Scale bars: c–f = 100 µm, g–i =50 µm, j =50 µm, k, l =20 µm, m–p = 5 µm. Photo credits: Leptoparies palmarum, Kazuaki Tanaka; Leptoparies magnoliae, Nimali Indeewari De Silva.
Silva NID, Thambugala KM, Tennakoon DS, Karunarathna SC, et al. 2022 – Taxonomy and phylogenetic appraisal of Dothideomycetous fungi associated with Magnolia, Lilium longiflorum and Hedychium coronarium. Journal of Fungi 8, 1094. https://doi.org/10.3390/jof8101094
Hashimoto A, Hirayama K, Takahashi H, Matsumura M, et al. 2018 – Resolving the Lophiostoma bipolare complex: Generic delimitations within Lophiostomataceae. Studies in mycology, 90, 161–189. https://doi.org/10.1016/j.simyco.2018.03.001
Chayanard Phukhamsakda, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand
Kazuaki Tanaka, Faculty of Agriculture and Life Science, Hirosaki University, Japan
Nimali Indeewari De Silva, Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;
(Edited by Chitrabhanu S. Bhunjun and Kevin D. Hyde)