Fungalpedia – Note 712, Longihyalospora
Longihyalospora. Tennakoon, C.H. Kuo & K.D. Hyde.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank. Fig 1
Classification: Chaetothyriaceae, Chaetothyriales, Chaetothyriomycetidae, Eurotiomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic and saprobic on dead leaves, appearing as small black dots with blackened mycelium. Mycelial pellicle elongated, subiculum-like, comprising hyphae that are mostly narrow, dense, dark brown or hyaline to subhyaline. Mycelial setae broad, dark brown, scattered, discrete, arranged as a ring around the pellicle, unbranched, formed on dense, dark hyphae. Sexual morph: Ascomata superficial, solitary to gregarious, subglobose to globose, dark brown to black, coriaceous, uniloculate, somewhat flattened when dry, opening with irregular fissures, covered by a mycelial pellicle. Peridium pale brown to brown, 2-layered, composing of hyaline inner cells of textura angularis and dark brown outer cells of textura angularis, fusing and indistinguishable from the host tissues. Asci 8-spored, fasciculate, bitunicate, broadly obovoid, short pedicellate, apically rounded, ocular chamber well-developed. Ascospores overlapping, irregularly 3-seriate, hyaline, fusiform, elongated, 5–17-septate, slightly constricted at the septa, tapering to the ends, smooth-walled, surrounded by a thin mucilaginous sheath. Asexual morph: Undetermined (Adapted from Tennakoon et al. 2019).
Notes: Tennakoon et al. (2019) introduced Longihyalospora with the type species of Longihyalospora ampeli. This genus differs from other genera in having a ring of setae around the pellicle and hyaline, elongate fusiform and 8–11-septa, thin sheathed ascospores tapering at the ends (Tennakoon et al. 2019). Furthermore, Tennakoon et al. (2019) introduced L. vermisporum as a combined novel taxon after in-depth morphological investigations, of Chaetothyrium vermisporum. This genus is morphologically similar to Chaetothyrium in having setose, globose ascomata with a mycelial pellicle and multi-septate ascospores, but differs by the colour of hyphae, size and shape of asci and ascospores (Spegazzini 1888; Hansford 1946; Tennakoon et al. 2019). According to our phylogenetic analysis, Longihyalospora clustered inside Chaetothyriaceae with 99% ML BS and 0.90 BY PP support. The recommended loci to distinguish this genus are LSU, ITS and SSU.
Type species: Longihyalospora ampeli D.S. Tennakoon, C.H Kuo & K.D. et al. (2019)
Other accepted species: Species Fungorum – search Longihyalospora.
Figures 1 – Phylogenetic tree generated from maximum likelihood analysis based on LSU and ITS sequence data for 273 strains representing epifoliar fungal species in Dothideomycetes, Eurotiomycetes, Lecanoromycetes and Sordariomycetes. Armillaria mellea (GLM 45831) was used as the outgroup taxon. The tree topology of the maximum-like-lihood analysis is similar to the Bayesian analysis. Bootstrap support values for maximum likelihood (ML) equal to or greater than 90% are given above or below the nodes. Branches with Bayesian poste- rior probabilities (BPP) equal to or higher than 0.90 are given above or below the nodes. The hyphen (“–”) indicates a value lower than 90% for ML BS or 0.90 for BY PP. Ex-type, holotype and ex-epitype strains are in bold. Epifoliar taxa of each clades are in red
Figures 1 – Continued.
Figures 1 – Continued.
Figures 1 – Continued.
References
Spegazzini C 1888 – Pugillus II. Anales de la Sociedad Cientifica Argentina 26:5–74.
Hansford CG 1946 – The foliicolous Ascomycetes, their parasites and associated fungi. Mycol Pap 15:1–240.
Entry by
Diana Sandamali Marasinghe, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai, 57100, Thailand School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand, Mushroom Research Foundation, 128 M.3 Ban Pa Deng T. Pa Pae, A. Mae Taeng, Chiang Mai, 50150, Thailand
Published online 29 August 2023