Pestalozziella subsessilis Sacc. & Ellis, Michelia 2(no. 8): 575 (1882)
Facesoffungi number: FoF 07487
Foliicolous on leaves of Geranium carolinianum (Geraniaceae). Sexual morph: undetermined. Asexual morph: Conidiomata 120–290 µm diam., 70–120 µm high, yellowish brown to brown, stromatic, pycnidial, epiphyllous, scattered to gregarious, deeply immersed, globose to subglobose, unilocular to multilocular, glabrous, papillate, ostiolate. Conidiomatal wall 7–26 µm wide, composed of textura angularis with cells in the outer layers moderately thick-walled and pale brown, and in the inner layers relatively thin-walled, hyaline. Conidiophores hyaline, unbranched, doliiform to short cylindrical or irregular, and arising from the innermost layers of basal wall. Conidiogenous cells 5–13 × 2–4 µm, hyaline, holoblastic, sympodial, ampulliform to lageniform or irregular, indeterminate, smooth-walled, with 1 to many, unthickened conidiogenous loci. Conidia 16–23 × 5–8 µm ( = 19 × 7 µm; n = 30), hyaline, ovoid to cylindrical with a rounded apex and a narrowly truncate or obtuse base, aseptate, straight or slightly curved, smooth-walled, bearing an apical appendage, apical appendages 17–23 × 0.6–1.4 µm ( = 19 × 1 µm), hyaline, excentric, branching irregularly or dichotomously, 2–6, filiform, flexuous, divergent.
Material examined: USA, New Jersey, Newfield, on leaves of Geranium carolinianum (Geraniaceae), 23 May 1882 (FH 01142400, type).
Pestalozziella subsessilis (FH 01142400, type). a, b Herbarium package and specimen. c, d Appearance of yellowish brown to brown conidiomata (arrows) on the host. e, f Vertical sections of conidiomata (e in 10% KOH, f in lactic acid). g Vertical section of peridium. h–l Conidiophores, conidiogenous cells and developing conidia (arrows show conidiogenous loci). m–o Conidia. Scale bars c = 500 µm, d–f = 100 µm; g–h = 20 µm. i–o = 10 µm.
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.