Paramicrosphaeropsis zagrosensis M.Mehrabi-Koushki, S.Artand, K.D.Hyde & Jayaward., 2022

Artand, Saeid, Mehrabi-Koushki, Mehdi, Tabein, Saeid, Hyde, Kevin D. & Jayawardena, Ruvishika S., 2022, Revision of the Microsphaeropsis complex with addition of four new Paramicrosphaeropsis L. W. Hou, L. Cai & Crous species from Zagrosian forest trees in Iran, Cryptogamie, Mycologie 20 (7), pp. 159-175 : 169-170

Paramicrosphaeropsis zagrosensis M.Mehrabi-Koushki, S.Artand, K.D.Hyde & Jayaward. , sp. nov.

( Fig. 5 )

HOLOTYPE. — Iran. Lorestan Province, Aligudarz, Zaz and Mahroo (forest mountains of Moolish), from leaf spot of Quercus brantii, IX.2020, S. Artand (holo-, IRAN [18144 F]; ex-type cultures, IRAN [4448 C] = SCUA-Ar-B10 A).

ADDITIONAL SPECIMEN EXAMINED. — Iran. Lorestan Province, Aligudarz, Zaz and Mahroo (forest mountains of Moolish), from stem canker of Crataegus sp. , IX.2020, S. Artand (SCUA-Ar-Z1 B).

ETYMOLOGY. — The name refers to the Zagros forest, where this fungus was collected.

MYCOBANK. — MB 841495.

DESCRIPTION

Asexual morphology

Pycnidia scattered and irregular, solitary or confluent, superficial on the medium or in aerial mycelium, sometime semiimmersed in the agar, globose to subglobose, covered with hyphal outgrowths, with inconspicuous ostiole, brown to dark brown with a paler wall, (80.4-)128.3-147.5(-214.4) × (78-)119.3-135.7(-205) µm, (x ± SD = 138.4 ± 4.8 × 128 ± 4.2 µm, n = 50). Pycnidial wall pseudoparenchymatous, composed of isodiametric to elongated cells, 3-5 layers, pale brown to brown, outer layers darker and pigmented. Conidiogenous cells phialidic, hyaline, smooth-walled, discrete, subglobose or bottle-shaped. Conidia mostly globose to subglobose but also broadly ellipsoidal, ovate-ellipsoidal or irregular in shape, pale brown to brown, straight or sometimes very slightly curved, smooth- and thin-walled, guttulate, aseptate, (3.2-)5.4-6.0(-7.4) × (2.6-)3.8-4.1(-5.3) µm, (x ± SD = 5.7 ± 0.2 × 4.0 ± 0.1 µm, n = 50). Chlamydospores and swelling cells not observed.

Sexual morphology

Not observed.

Figures

FIG. 5. — Paramicrosphaeropsis zagrosensis M.Mehrabi-Koushki,S.Artand, K.D.Hyde & Jayaward., sp. nov.(holo-, IRAN[17600F]): A, B, eight-days colony on OA (top and reverse); C, D, eight-days colony on PDA (top and reverse); E, F, old colony on OA (top and reverse); G-I, pycnidia; J, pycnidal wall; K, conidiogenous cells; L, conidia. Scale bars: G, H, 500 µm; I, 200 µm; J, 50 µm; K, L, 20 µm.