Magnibotryascoma Thambug. & K.D. Hyde, Fungal Divers. 74: 249 (2015).
Index Fungorum number: IF 551266; MycoBank number: MB 551266; Facesoffungi number: FoF 00835; 2 morphological species (Index Fungorum 2020), 2 species with molecular data.
Type species – Magnibotryascoma uniseriatum (Mugambi, A.N. Mill. & Huhndorf) Thambugala & K.D. Hyde, Fungal Divers. 74: 249 (2015).
≡ Misturatosphaeria uniseriata Mugambi, A.N. Mill. & Huhndorf, in Mugambi & Huhndorf, Stud. Mycol. 64: 116 (2009).
Notes – Jaklitsch et al. (2016b) provided a broad investigation on Floricolaceae and synonymized all genera under Teichospora and illustrated Teichospora trabicola as type species. However, the morphological characters of Magnibotryascoma species are distinctly different from T. trabicola in having brown to fusiform to elliptical, 1–3-septate, ascospores, whereas T. trabicola has muriform ascospores which are not or slightly constricted at the septa (Jaklitsch et al. 2016b). According to the multi-gene phylogeny herein, Magnibotryascoma species nested separately from Teichospora species (Fig. 152). However, Magnibotryascoma mali constitutes an independent lineage sister to Macrodiplodiopsis desmazieri (Fig. 152). Magnibotryascoma mali differs from Macrodiplodiopsis desmazieri in having superficial, globose conidiomata, enteroblastic, phialidic conidiogenous cells and unicellular, reddish-brown conidia, whereas M. desmazieri has immersed conidioma, annellidic conidiogenous cells, and 3-distoseptate conidia (Wijayawardene et al. 2014a). The morphological characters of Magnibotryascoma mali closely resembles Magnibotryascoma acaciae in oval to broad-oboviod, unicellular, reddish-brown conidia (Crous et al. 2016a). Therefore, further taxonomic work is needed to resolve identification, phylogenetic position and relationships between Magnibotryascoma mali and other Magnibotryascoma species. We treat Magnibotryascoma as a separate genus in Teichosporaceae based on both morphology and phylogeny evidence.
Figure 152 – Phylogram generated from maximum likelihood analysis (RAxML) of genera in Teichosporaceae based on ITS, LSU, and tef1 sequence data. Maximum likelihood bootstrap values equal or above 70 %, Bayesian posterior probabilities equal or above 0.90 (MLBS/PP) are given at the nodes. An original isolate number is noted after the species name. The tree is rooted to Hermatomyces tectonae (MFLUCC 14-1140) and H. thailandica (MFLUCC 14-1143). The ex-type strains are indicated in bold. Hyphen (-) represents support values below 70 % MLBS and 0.90 PP.