Phlyctema coronillae W.J Li, Camporesi & K.D. Hyde
Index Fungorum number: IF557160, Facesoffungi number: FoF 07494
Etymology: Named after the host genus Coronilla, from which it was collected.
Saprobic on dead stems of Hippocrepis emerus (Fabaceae). Sexual morph: undetermined. Asexual morph: Conidiomata 230–260 µm diam., 80–110 µm high, brown to dark brown, pycnidial, solitary or gregarious, subglobose, thick-walled, unilocular, glabrous. Ostiole absent, dehiscence by longitudinal fissure. Conidiomatal wall 10–20 µm wide, composed of pale brown to hyaline, thick-walled cells of textura prismatica. Conidiophores formed from the inner wall layers of conidiomata, hyaline, cylindrical, repeatedly branched at the base and above, usually fasciculate, septate in association with branches, tapered towards the apices, smooth-walled. Conidiogenous cells 5–16 × 2–3 µm, hyaline, holoblastic, subcylindrical, discrete or integrated, indeterminate, thick-walled, smooth. Conidia 12–29 × 2–3 µm ( = 24 × 2 µm, n = 30), hyaline, falcate to fusiform, obtuse at each end, aseptate, smooth, thin-walled, occasionally guttulate.
Material examined: Italy, Province of Forlì-Cesena, Santa Sofia, Corniolo, on dead aerial branches of Coronilla emerus (Fabaceae), 18 May 2015, Erio Camporesi, IT2495 (MFLU 15-1243, holotype).
Notes: Phlyctema coronillae shares similar form of conidiomata, conidiogenous cells and conidia with P. vagabunda, but it can be differentiated by conidial dimensions. P. coronillae has shorter and narrower conidia than P. vagabunda (20–34 × 2.6–4 µm). Phylogenetic analyses also support them as separate species.
Phlyctema coronillae (MFLU 15-1243, holotype) a Herbarium specimen. b, c Appearance of brown to dark brown coniodiomata on the host. d Vertical section of conidioma. e Section of peridium. f–h Conidiophores, conidiogenous cells and developing conidia. i–m Conidia. Scale bars d = 100 µm, e = 50 µm, f–m = 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.