Paramicrosphaeropsis pistacicola 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 : 166-168

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

( Fig. 3 )

HOLOTYPE. — Iran. Khuzestan Province, Dezful, Sardasht (forest mountains of Saland-Kooh), from leaf spot of Pistacia khinjuk, III.2021, S. Artand (holo-, IRAN [18145 F]; ex-type cultures, IRAN [4449 C] = SCUA-Ar-SK11 A).

ADDITIONAL SPECIMEN EXAMINED. — Iran. Khuzestan Province, Dezful, Sardasht (forest mountains of Saland-Kooh), from leaf spot of Pistacia atlantica, III.2021 , S. Artand ( IRAN [4450 C] = SCUA-Ar-SK1D).

ETYMOLOGY. — The name refers to the host genus Pistacia L. from which it was isolated.

MYCOBANK. — MB 841493.

DESCRIPTION

Asexual morphology

Pycnidia scattered and irregular, mostly solitary, sometimes confluent, superficial on the medium or in aerial mycelium, globose to subglobose, occasionally flask-shaped, glabrous or covered with some hyphal outgrowths, with inconspicuous ostiole, rarely with a conspicuous ostiole, brown to dark brown with a paler wall, (78-)113.2-127(-208) × (53.6-)91.3-103.9 (-187.6) µm, (x ± SD = 120.5 ± 3.5 × 97.6 ± 3.1 µm, n = 50). Pycnidial wall prosenchymatous and pseudoparenchymatous, composed of branched hyphae and elongated cells, 3-12 layers, sometimes wall layers do not completely enclose conidiomata and the conidia can be seen through hyphal network, pale brown to brown. Conidiogenous cells phialidic, hyaline, smooth-walled, discrete, globose to subglobose. Conidia mostly subglobose to ellipsoidal but also ovoid, obpyriform or irregular in shape, pale brown to brown, straight or slightly curved, smooth- and thin-walled, guttulate, aseptate, (4.2-)5.5-6.2 (-8.4) × (3.2-)3.9-4.2(-5.3) µm, (x ± SD = 5.8 ± 0.2 × 4.1 ± 0.1 µm, n = 50). Chlamydospores and swelling cells not observed.

Sexual morphology

Not observed.

Figures

FIG. 3. — Paramicrosphaeropsis pistacicola M.Mehrabi-Koushki,S.Artand, K.D.Hyde & Jayaward., sp. nov. (holo-, IRAN[17598F]): A, B, eight-days colony on OA (top and reverse); C, D, eight-days colony on PDA (top and reverse); E, old colony on OA (top); F, G, pycnidia; H, pycnidal wall; I, conidiogenous cells; J, conidia. Scale bars: F, 500 µm; G, H, 50 µm; I, J, 20 µm.