Pleosporales » Didymosphaeriaceae


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

Index Fungorum number: IF 550556; Facesoffungi number: FoF 00007, 15 morphological 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 of textura 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 from Wijayawardene et al. 2014).


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


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


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