Capnodiales » Mycosphaerellaceae

Cytostagonospora

Cytostagonospora Bubák, Annls mycol. 14(3/4): 150 (1916)

Facesoffungi number: FoF 07226

Dothideomycetes, Dothideomycetidae, Capnodiales, Mycosphaerellaceae

 

Saprobic on the host plant in terrestrial habitat. Sexual morph: undetermined. Asexual morph: Conidiomata dark brown to black, pycnidial, amphigenous, solitary, immersed, globose, unilocular, glabrous, clypeate. Ostiole circular, papillate to shortly rostrate, depressed, central, situated within the clypeus. Conidiomatal wall composed of thick-walled, dark brown cells of textura globulosa in the exterior, becoming hyaline cells of textura angularis toward hymenium. Conidiophores arising from inner layers of conidiomata, reduced to conidiogenous cells. Conidiogenous cells hyaline, holoblastic, ampuliform to lageniform, smooth-walled. Conidia hyaline, filiform, with obtuse apex and truncate base, 0–2-septate, not constricted at septa, smooth-walled, eguttulate (Sutton 1980).

 

Type species: Cytostagonospora photiniicola Bubák, Annls mycol. 14(3/4): 150 (1916)

 

Notes: Cytostagonospora was treated as a synonym of Septoria by von Arx (1983), while it was retained as a separate genus by Sutton (1980). Quaedvlieg (2013) obtained a culture of C. martiniana and clarified the phylogenetic position of Cytostagonospora, in Mycosphaerellaceae (Capnodiales), which is distinct from Septoria. However, no molecular data is available for the type species occurring on Photinia serrulata, Austria. Fresh material is needed to confirm its placement.

 

Distribution: Canada, Italy, New Zealand, Pakistan (https://www.gbif.org/)

 

Cytostagonospora photiniicola (redrawn from Sutton 1980) a Conidia. b Vertical section of conidioma. c Conidiogenous cells and developing conidia.

 

References:

 

Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.

 

 

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