Pezicula italica W.J. Li, Camporesi & K.D. Hyde, sp. nov.
Index Fungorum number: IF557158, Facesoffungi number:
Etymology: Named after the country from which it was collected.
Saprobic on dead stem of Corylus sp., forming conspicuous, rounded to irregular, black conidiomata. Sexual morph: undetermined. Asexual morph: Conidiomata 100–200 µm diam., 200–450 µm high, pycnidial, solitary, gregarious or confluent, semi-immersed, cylindrical to subglobose, erumpent when mature, dark brown to black, subglobose to subcylindrical, unilocular, thick-walled. Ostiole cylindrical, single. Conidiomatal wall 20–40 µm wide, composed of thick-walled, hyaline to pale brown cells of textura angularis at the base, thick-walled, dark brown cells of textura angularis at periclinal layers. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 3–6 × 3–4 µm, hyaline, enteroblastic, phialidic, indeterminate, cylindrical to subcylindrical. Conidia 20–28 × 3.5–4.5 µm (= 25.5 × 4 µm; n = 30), hyaline, oblong to cylindrical, straight, aseptate, smooth, thick-walled.
Material examined: Italy, Province of Arezzo, Passo della Consuma, on dead aerial branches of Corylus sp. (Betulaceae), 11 August 2014, Erio Camporesi, IT2047 (MFLU 16-1284, holotype), (KUN, HKAS 101686, isotype); IT2047S (MFLU 19-2867, paratype).
Notes: Phylogenetic analysis base on multi-gene of LSU, ITS and rpb2 sequence data shows that two strains of Pezicula italica are distinct from any other Pezicula species and formed a branch above P. corylina J.W. Groves (Fig. 263). Pezicula italica shares similar characters with P. corylina and P. pruinosa Farl. in structure of conidiomata and conidia. However, P. italica has smaller conidiomata and narrower conidia than P. corylina (conidiomata 0.2–0.5 mm diam., 0.3–0.5 mm high; conidia 19–23.5 × 7.5–8.5 µm) and P. pruinosa (conidiomata up to 500 µm diam. at the base, tapering to 250 µm diam., 5–2 mm high; conidia: 24–26 × 9–10 µm).
Pezicula italica (MFUL 16-1284, holoypye) a, b Appearance of black coniodiomata on the host. d Vertical section of conidioma. c, e–f Sections of peridium. g–j Conidiogenous cells and developing conidia. k–p Conidia. Scale bars: a–b, d = 200 µm, c = 100 µm, e–p = 20 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.