Pestalozziella Sacc. & Ellis ex Sacc., Michelia 2(no. 8): 575 (1882)
Facesoffungi number: FoF 07486
Ascomycota, genera incertae sedis
Parasitic on leaves of leaves of Geranium carolinianum (Geraniaceae). Sexual morph: undetermined. Asexual morph: Conidiomata yellowish brown to brown, stromatic, pycnidial, epiphyllous, scattered to gregarious, deeply immersed, globose to subglobose, unilocular or multilocular, glabrous, papillate, ostiolate. Conidiomatal wall composed of textura angularis with thick-walled, hyaline to pale brown cells. Conidiophores arising from the innermost layers of basal wall, hyaline, unbranched, doliiform to short cylindrical or irregular. Conidiogenous cells hyaline, holoblastic, sympodial, lageniform to irregular, determinate, smooth-walled. Conidia hyaline, ovoid to cylindrical, aseptate, straight or slightly curved, smooth-walled, bearing an apical appendage that is excentric, branching irregularly or dichotomously, 2–6, filiform, flexuous, and divergent.
Notes: Pestalozziella subsessilis Sacc. & Ellis. was associated with leaf spots on Geranium carolinianum. In addition to type species, nine taxa have been described in or transferred to this genus. Nag Raj (1972) revised the genus and accepted four species, P. andersonii Ellis & Galloway, P. artocarpi Nag Raj & W.B. Kendr., Ellis & Galloway, P. parva Nag Raj, and P. subsessilis Sacc. & Ellis. Pestalozziella ambigua Höhn. and P. gossypina G.F. Atk. were transferred to Chaetospermum Sacc. while P. circularis Cooke & Massee was made the type species of a new genus Coma Nag Raj & W.B. Kendr. Pestalozziella geranii-pusilli was reduced to synonymy with P. subsessilis. In spite of the revisions by Nag Raj (1972, 1973), the description of Pestalozziella is still ambiguous. Species in Pestalozziella have pycnidial or acervular conidiomata, and sympodial, enteroblastic (phialidic) or holoblastic conidiogenous cells. In addition, conidial appendages are dichotomous or branching from a single point, apical or subapical.
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