Pseudocamarosporium

Pseudocamarosporium Wijayaw. & K.D. Hyde, Cryptog. Mycol. 35(2): 185 (2014).

Index Fungorum number:IF 550556; Facesoffungi number:FoF00007,15morphological species (Species Fungorum 2022), 15 species with molecular data.

Endophytic or saprobic on dead twigs, branches, cones and stems of a range of host plants.Sexual morph: Unknown.Asexual morph:Conidiomata pycnidial, black, globose to subglobose, unilocular, immersed, solitary to gregarious, brown to dark brown, ostiolate.Ostiole central, papillate.Conidiomata wall outer layer composed of thin walled, brown cells oftextura angularis, becoming paler towards the inside.Conidiophores reduced to conidiogenous cells.Conidiogenous cell enteroblastic, phialidic with percurrent proliferation, simple, short, hyaline, thin-walled, indeterminate, discrete to integrated.Conidia oblong, muriform, with transverse and longitudinal septa, occasionally oblique septa, generally with a truncate base and obtuse apex, varying in shape, brown to dark brown, smooth-walled (Adapted fromWijayawardene et al. 2014).

Type species:Pseudocamarosporium propinquum(Sacc.) Wijayaw., Camporesi & K.D. Hyde

Notes:Pseudocamarosporium was introduced by Wijayawardene et al. (2014) withP. propinquumas type species.Pseudocamarosporium is characterized by immersed, solitary to gregarious conidiomata, enteroblastic, phialidic conidiogeneous cells, oblong, muriform conidia.Pseudocamarosporium morphologically resemblesCamarosporium sensu stricto andParacamarosporium (inDidymosphaeriaceae) but the latter genus produces microconidia and paraphyses which is lacking inPseudocamarosporium.Camarosporium sensu stricto is a polyphyletic lineage in Pleosporineae, while other camarosporium-like taxa group as two other separate clades inDidymosphaeriaceae,Massarineae(Wijayawardene et al. 2014).  In the phylogenetic analyses ofWijayawardene et al. (2014),Pseudocamarosporium reside inDidymosphaeriaceae. Currently,Pseudocamarosporium is a distinct and well-supported lineage inDidymosphaeriaceae.

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