Sirococcus conigenus (Pers.) P.F. Cannon & Minter, Taxon 32(4): 577 (1983)
Facesoffungi number: FoF 07591
Saprobic or parasitic on the host plant. Sexual morph: undetermined. Asexual morph: Conidiomata 300–400 µm diam., 250–300 µm high, dark brown to black, pycnidial, solitary to gregarious, initially immersed, becoming erumpent, globose, unilocular or multilocular, convoluted, glabrous. Ostiole absent, dehiscence by breakdown of the upper wall. Conidiomatal wall 40–100 µm wide, composed of thick-walled, dark brown to brown cells of textura angularis in the exterior, becoming thin-walled, pale brown to hyaline cells of textura intricata towards hymenium. Conidiophores formed from inner layers of conidiomata, hyaline, cylindrical, branched, septate, smooth-walled. Conidiogenous cells 5–18 × 2–3 µm, hyaline, enteroblastic, phialidic, cylindrical, integrated or discrete, determinate, smooth-walled, with a minute apical channel and collarette, periclinal thickenings at the collarette zone. Conidia 10–14 × 2–3 µm (= 12 × 2.8 µm; n = 50), hyaline, cylindrical to fusiform, with an obtuse and narrow apex and a slightly truncate base, 1-septate, smooth-walled, guttulate.
Material examined: Italy, Province of Forlì-Cesena, Santa Sofia, Campigna, on dead land strobilus of Picea abies (Pinaceae), 15 April 2015, Erio Camporesi, IT2447 (MFLU 15-1235); (KUN, HKAS 97485)
Sirococcus conigenus (MFLU 15-1235) a Herbarium specimen. b–d Appearance of dark brown to black conidiomata on the host. e–f Vertical sections of conidiomata. g Section of peridium. h–l Conidiophores, conidiogenous cells and developing conidia. m–p Conidia. Scale bars b = 1000 µm, c = 500 µm, d = 200 µm, e–f = 100 µm, g = 50 µm, h–m = 10 µm, n–p = 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.