Fungalpedia – Note 728, Micropeltis
Micropeltis. Mont.
Citation when using this data: D. S. Marasinghe et al. 2023 (in prep.) – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank., Fig 1
Classification: Micropeltidaceae, Microthyriales, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Epiphytic on living leaves, appearing as black dots. Superficial hyphae hyaline, hard to detect. Sexual morph: Thyrothecia superficial, solitary, gregarious, subdense, black, flattened, circular, dimidiate with a central ostiole. Upper wall bluish green or blackish green, membranous, comprising overlapping, compact, pseudoparenchymatous hyphae with textura epidermoidea, lack of basal layer. Hamathecium comprising of filiform, thin, hyaline, evanescent paraphyses with inclined asci towards the ostiole. Asci 8-spored, bitunicate, ovoid to widely fusiform. Ascospores overlapping, 2-seriate, clavate to fusiform, elliptic or spindled shaped, hyaline, 4–6-septate, sometimes curved, constricted at septa, head cell longer and larger, tapering at bottom, with or with- out thin mucilaginous sheath. Asexual morph: Undetermined (Zeng et al. 2019).
Notes: Micropeltis was initially described by Montagne (1842) typifying M. applanata Mont. as the type species. It is the type genus of Micropeltidaceae. Micropeltis is characterized in having bluish green to black thyriothecia, peridium with compacted irregular, meandering, pseudoparenchymatous hyphae, ovoid to widely fusiform asci and clavate to fusiform, multi-septate ascospores (Wu et al. 2011a, 2014; Hyde et al. 2013; Hongsanan et al. 2015b). According to our phylogenetic analysis (LSU and ITS) Micropeltis formed a basal clade together with Dictyothyriella, Scolecopeltidium and Stomiopeltopsis with 100% ML BS, 1.00 BY PP sup- port.
Type species: Micropeltis applanata Mont., Annls Sci. Nat.,Bot., se´r. 2 17: 122 (1842)
Other accepted species: Species Fungorum – search Micropeltis.
Figure 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
Figure 1 – Continued.
Figure 1 – Continued.
Figure 1 – Continued.
References
Hyde KD, Jones EBG, Liu JK et al 2013 – Families of Dothideomycetes. Fungal Divers 63:1–313.
Wu HX, Tian Q, Li WJ et al 2014 – A reappraisal of Microthyriaceae. Phytotaxa 176:201–212.
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