Myriangiella Zimm., Centbl. Bakt. ParasitKde, Abt. I 8: 183 (1902).
Index Fungorum number: IF 3356; Facesoffungi number: FoF 07048, 4 morphological species (Species Fungorum 2022), no molecular data available.
Epiphytic on various flowering plants. Sexual morph: Ascostromata flattened, circular, disciform. Asci 8-spored, bitunicate, ovoid, short pedicellate. Ascospores phragmosporous, hyaline, oblong, septate. Asexual morph: Unknown (adapted from Saccardo 1906 and Phookamsak et al. 2016).
Type species: Myriangiella orbicularis Zimm.
Notes: Myriangiella is characterised by flattened, circular, disciform ascostromata, ovoid, short pedicellate asci and phragmosporous, hyaline, oblong, septate ascospores. Toro (1927) added a second species Myriangiella arcuata collected from Casearia arculeata and was associated with Scolecopeltis micropeltiformis. Höhnel (1909) treated Myriangiella as a synonym of Micropeltis. Höhnel (1912) excluded M. orbicularis from Micropeltis and accommodated it in a new genus Phragmothyriella. Toro (1927) did not agree with Höhnel (1909) because M. orbicularis was previously the type species of Myriangiella, already accommodated in its own genus. Toro (1927) re-established Myriangiella with M. orbicularis as type species and synonymized Phragmothyriella moelleriana (Sacc.) Höhn. under Myriangiella. Müller and Arx (1962) synonymized Myriangiella moelleriana under Schizothyrium moellerianum. Limber and Jenkins (1949) moved Myriangium sabaleos to Myriangiella as M. sabaleos based on morphology. Phookamsak et al. (2014) pointed out that M. sabaleos has muriform ascospores which is atypical of Myriangiella which has phragmosporous ascospores and this species needs to be re-collected. Arx and Müller (1975) re-studied bitunicate ascomycetes and transferred Protopeltis roupalae to Myriangiella. The placement of Myriangiella has been controversial during recent years. Saccardo (1906) transferred Myriangiella to Myriangiaceae, but Toro (1927) placed Myriangiella in Hemisphaeriaceae and Arx and Müller (1975) considered it as a genus in Schizothyriaceae. Phookamsak et al. (2016) treated Myriangiella in Schizothyriaceae, genera incertae sedis as the type specimen and taxonomic illustration of Myriangiella is lost. Currently, Myriangiella is a distinct genus in Schizothyriaceae but molecular data is needed to confirm the taxonomic position of the genus.
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