Sardiniella celtidis Dissan., Camporesi & K.D. Hyde, in Hyde et al., Fungal Diversity 87: 12 (2017)
Index Fungorum number: IF 552896; Facesofungi number: FoF 02732
Etymology: in reference to the host Celtis australis.
Holotype: MFLU 15-3229.
Saprobic on Celtis australis L. Sexual morph: Undetermined. Asexual morph: Conidiomata 220–295 μm high × 158–205 μm diameter (x̄ = 264 × 181 μm, n = 10), pycnidial, solitary or gregarious, dark brown to black, globose to oval, uniloculate, ostiolate. Peridium thick-walled, wall composed of dark brown cells of textura angularis, lighter in colour towards the inner layers. Conidiophores 5–13 × 3–7 μm (x̄ = 9 × 5 μm, n = 10), hyaline, smooth, thin-walled, cylindrical to oblong. Conidiogenous cells 4–7 × 2–3 μm (x̄ = 6 × 3 μm, n = 10), hyaline, smooth, cylindrical, holoblastic, proliferating percurrently to form annellations. Conidia 21–28 × 10–12 μm (x̄ = 25 × 11 μm, n = 10), ovoid to ellipsoid, thick-walled, with irregular surface, initially hyaline and aseptate, becoming dark brown and 1-septate with age. Microconidiogenous cells or microconidia not seen.
Culture characteristics: Colonies on PDA covering the entire plate after 7 days at 25 °C, mycelium velvety and moderately fluffy with an irregular margin, surface initially white and later turning dark olivaceous from the middle of the colony and dark grey in reverse.
Material examined: ITALY, Forlì-Cesena Province [FC], on dead aerial branch of Celtis australis (Cannabaceae), 7 October 2015, E. Camporesi, (MFLU 15-3229, holotype), ex-type living cultures MFLUCC 17-0981, KUMCC 16-0214).
GenBank nimbers: ITS: MF443249, TEF1: MF443248.
Notes: Sardiniella urbana, isolated from diseased European hackberry trees in an urban environment on the island of Sardinia, Italy, previously represented this monotypic genus. In the phylogenetic analysis of combined ITS and TEF1 sequence data, the new taxon S. celtidis is basal to S. urbana (Hyde et al. 2017), but segregates from the latter with high bootstrap support value (99%). With this new taxon, two species (S. urbana and S. celtidis) are included in this genus.