Comatospora suttonii Piroz. & Shoemaker, Can. J. Bot. 49: 539 (1971)
Saprobic on twigs and leaf scars of withered branches of Picea mariana (Pinaceae). Sexual morph: undetermined. Asexual morph: Conidiomata 200–300 µm diam., 70–150 µm high, black, pycnidial, solitary to gregarious, superficial, hemispherical or pyriform, unilocular, glabrous, opening by an ill-defined pore or papillate, ostiolate. Ostiole oval or circular, centric or eccentric. Conidiomata wall 30–50 µm wide, composed of thick-walled, progressively dark brown to hyaline cells of textura angularis from outer layers to inner layers. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 10–20 × 4–7 µm, enteroblastic, annelledic, hyaline, cylindrical, clavate or ampulliform, thin-walled and smooth, percurrently proliferating upward several times and producing new conidia at higher level each time. Conidia 7–17 × 4–7 µm (x= 11 × 5 µm; n = 30), hyaline, ellipsoid to ovoid, rounded and broad at apex, narrowed and slightly truncate at base, 1-septate, smooth-walled, and occasionally slightly constricted at septum, guttulate, bearing up to 8, filiform, flexuous, apical appendages.
Material examined: Canada, British Columbia, Victoria, Vancouver Island, Old Fort, on twigs and leaf scars of withered branches of Picea mariana (Pinaceae), J.S. Monts, 8 June 1967 (DAOM 129701, holotype).
Comatospora suttonii (DAOM 129701, holotype) a–c Herbarium specimen. d–g Appearance of black conidiomata on the host. h–i Vertical section of conidiomata. j Section of peridium. k–n Conidiogenous cells and developing conidia (arrows show annellations). o–s Conidia. Scale bars d–e = 500 µm, f–g = 200 µm, h–i = 100 µm, j = 20 µm, k–s = 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.