Rasutoria
Rasutoria M.E. Barr, Mycotaxon 29: 501 (1987).
Index Fungorum number: IF 25132; Facesoffungi number: FoF 06937, 2 morphological species (Species Fungorum 2022), no molecular data available.
Associated with needles on Abies amabilis. Sexual morph: Ascomata on branching, brown mycelium, densely clustered on lower side of the leaves, dark brown, mostly about 150 μm, hyphal appendages numerous, brown, obtuse, sometimes septate. Asci 8-spored, bitunicate, fasciculate, saccate to oblong, paraphysate, numerous in perithecium. Ascospores conglobate in asci, hyaline to brown, uniseptate. Asexual morph: Unknown (Adapted from Dearness 1926).
Type species: Rasutoria abietis (Dearn.) M.E. Barr
Notes: Rasutoria is characterised by its occurrence on conifer needles, ascomata on branching mycelium, saccate to oblong asci and uniseptate ascospores. Winton et al. (2007) provided sequence data for two Rasutoria species. Rasutoria resembles Mycosphaerella and Phaeocryptopus in having globose, thin-walled pseudothecia, lacking pseudoparaphyses, bitunicate, ovoid to cylindrical, 8-spored asci, and fusoid to obovate, equatorially euseptate, hyaline to pale brown ascospores (Winton et al. 2007). Chomnunti et al. (2014) and Wijayawardene et al. (2017a, 2018) treated Rasutoria within Euantennariaceae based on the sooty mould lifestyle. Videira et al. (2017) placed two species Rasutoria pseudotsugae and R. tsugae among Zasmidium species based on phylogenetic analyses of LSU, ITS and rpb2. Only Rasutoria pseudotsugae and R. tsugae have DNA sequences and other two species Rasutoria abietis and R. terrieri need to be recollected to confirm the correct systematic position of Rasutoria. Currently, Rasutoria is a distinct genus in Euantennariaceae but molecular data is required to confirm this placement.
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