Suttonomyces
Suttonomyces Wijayaw., Camporesi & K.D. Hyde, in Wijayawardene et al., Cryptog. Mycol. 36(2): 220 (2015).
Index Fungorum number: IF 551091; Facesoffungi number: FoF 00468; 2 morphological species (Species Fungorum 2022), 2 species with molecular data.
Saprobic on branch of Clematis vitalba. Sexual morph: Unknown. Asexual morph: Conidiomata pycnidial, dark brown to black, solitary, superficial, unilocular, globose to sub-globose, with a centrally located papillate ostiole. Pycnidial wall with outer thick wall layer of dark brown cells of textura angularis, inner most layer hyaline, thin. Paraphyses present, hyaline, aseptate, tapering to obtuse apex, cylindrical, not abundant. Conidiophores reduced to conidiogenous cells. Conidiogenous cells simple, continuous, smooth, blastic to percurrent proliferation. Conidia pale brown to dark brown, oblong, with a truncate base, obtuse at the apex, straight to curved, muriform, with 1−2 transverse septa and occasionally 1 longitudinal septum, smooth-walled, guttulate when young and occasionally even at maturity (adapted from Wijayawardene et al. 2015).
Type species: Suttonomyces clematidis Wijayaw., Camporesi & K.D. Hyde
Notes: Suttonomyces is characterised by pycnidial, dark brown to black, solitary, superficial, unilocular, globose to sub-globose conidiomata, simple, continuous, smooth, blastic to percurrent conidiogenous cells, and pale brown to dark brown muriform conidia with 1−2 transverse septa and occasionally 1 longitudinal septum. Suttonomyces is closely related to Neottiosporina but differs in that the latter has hyaline conidia with basal and apical appendages while the former has muriform pale brown to dark brown conidia lacking appendages (Sutton 1980, Wijayawardene et al. 2015). Suttonomyces is also closely related to Stagonospora but differs in that the latter has hyaline, smooth conidia with several transverse septa (Sutton 1980). Suttonomyces differs from genera in Massarinaceae in having camarosporium-like appearance (Hyde et al. 2013, Wijayawardene et al. 2014a). Suttonomyces morphologically differs from Camarosporium sensu stricto in having hyaline, aseptate paraphyses while the latter lacks paraphyses (Sutton 1980, Wijayawardene et al. 2014b). Suttonomyces can also be differentiated from similar genera based on DNA sequence data. Suttonomyces is morphologically and phylogenetically a distinct genus in Massarinaceae. Molecular markers available for Suttonomyces are ITS, LSU and SSU.
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