Pleosporales » Didymosphaeriaceae » Paraconiothyrium

Paraconiothyrium rosae

Paraconiothyrium rosae Senan., Wanas., Camporesi & K.D. Hyde, in Wanasinghe et al., Fungal Diversity: 10.1007/s13225-018-0395-7, [31] (2018)

Index Fungorum number: IF554131; Facesofungi number: FoF 03968

Etymology: The specific epithet reflects the host genus Rosa.

Holotype: MFLU 15–1115

Pathogenic on spines and stems of Rosa canina L. Sexual morph: Undetermined. Asexual morph: Conidiomata 140–150 × 100–145 μm, pycnidial, solitary, superficial to semi-immersed, globose to subglobose, dark brown. Peridium comprising 5–10 cell-layers of thick-walled, hyaline to pale brown cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 6–12 × 1.5–2 μm, conical to subulate or subcylindrical, doliiform, broadly or elongated ampulliform, sometimes with a long neck, phialidic with periclinal wall thickening or with one or more percurrent proliferations near the apex. Conidia 3–3.5 × 2–2.5 μm, hyaline, subcylindrical to ellipsoidal, both ends obtuse, 1-celled, smooth-walled.

Material examined: ITALY, Province of Forlı`-Cesena, Civitella di Romagna, near Giaggiolo, on dead aerial spines of Rosa canina L. (Rosaceae), 28 January 2015, Erio Camporesi, IT 2359 (MFLU 15-1115, holotype).

GenBank Numbers: ITS: MG828932; LSU: MG829041; SSU: MG829147.

Note: Paraconiothyrium rosae is a saprobic species distinct from other soil inhabiting species by its hyaline conidia and absence of conidiophores. Phylogenetic analysis based on concatenated LSU, SSU, ITS and TEF sequence data indicates that P. rosae clusters near to other Paraconiothyrium species with no support value. In this study, we did not obtain an isolate and therefore we isolated DNA directly from the fruiting bodies.