Pseudobasidiospora caroliniana Dyko & B. Sutton, Nova Hedwigia 29(1-2): 169 (1978) 
Facesoffungi number: FoF 07533
Saprobic on leaf litter of Acer sp. (Aceraceae). Sexual morph: undetermined. Asexual morph: Conidiomata 110–160 diam., 100–170 µm high, pycnidial, amphigenous, solitary to gregarious, subepidermal, deeply immersed, with only the rostrate neck emerging well above the leaf surface, flask-shaped or rounded, globose to subglobose, unilocular, glabrous, thick-walled, ostiolate. Ostiole 30–70 × 40–50 µm, single, centrally located, with a conical to subcylindrical neck. Conidiomatal wall 15–50 µm wide, composed of an outer textura globulosa to textura angularis, with large, thick-walled and dark brown to pale brown cells, and inner textura angularis, with smaller and compact, thick-walled, hyaline cells. Conidiophores reduced to conidiogenous cells. Conidiogenous cells hyaline, holoblastic, consisting of two parts, base 3–7 × 1–4 µm, ampulliform to lageniform or rounded, bulging, upper half 10–20 × 1–2 µm, cylindrical to subcylindrical, narrowed, smooth-walled, arising from the innermost wall layer of conidiomata. Conidia 10–15 × 3–5 µm ( = 12 × 4 µm; n = 50), hyaline, naviculate with slightly apiculate ends, aseptate, smooth-walled, guttulate, bearing mucoid appendage(s) at each end, or occasionally at one end only; appendages initially funnel-shape, later arising by eversion and subsequent irregular splitting of a mucoid sheath enveloping the developing conidia.
Material examined: Canada, Ontario, Waterloo, Laurel Creek Conservation area, on Acer sp. leaf litter from bottom of dried up pond, September 1979, J. Michaelides (DAOM 215283).
Pseudobasidiospora caroliniana (DAOM 215283) a–c Herbarium package and specimen. d, i, j Conidiomatal wall. e, f Rostrate neck emerging well above the leaf surface. g, h Vertical sections of conidiomata. k–n Conidiogenous cells and developing conidia. o–u Conidia. Scale bars d, i, j = 20 µm, e–f = 200 µm, g–h = 50 µm, k–n = 10 µm, o–u = 5 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.