Phaeosphaeriopsis omaniana Al-Jaradi, Al-Sadi & Maharachch., 2020

Al-Jaradi, Asma J., Maharachchikumbura, Sajeewa S. N. & Al-Sadi, Abdullah M., 2020, Phaeosphaeriopsis omaniana (Phaeosphaeriaceae, Pleosporales), a novel fungus from Oman, Phytotaxa 436 (2), pp. 187-192 : 190

Phaeosphaeriopsis omaniana Al-Jaradi, Al-Sadi & Maharachch. , sp. nov., FIGURE 2 .

MycoBank number: MB 833202.

Facesoffungi number: FoF 07703.

Etymology: Named after the country where the fungus was collected, Oman.

Associated with brown leaf spot on Dracaena serrulate Sexual morph: Not observed. Asexual morph: Conidiomata solitary, pycnidial, scattered, globose, 100–250 μm diam, superficial in PDA medium, brown to black, ostiolate, exuding black mucoid conidial mass; Peridium comprising 2–4 layers (5–10μm wide) of brown, thickwalled cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells lining inner cavity, hyaline, smooth-walled, ampulliform, phialidic, 4–7 × 2–4 μm. Conidia solitary, aseptate, medium brown, smooth, subglobose, (4.5–)7(–8) × (4.5–)7(–7.5) μm.

Culture Characteristics: Colonies on PDA attaining 40 mm diam. after 7 days at 25–30°C, flat, circular spreading, green and greyish green, velvety, with entire to slightly undulate edge., with moderate aerial mycelium. After 5 to 10 days conidiomata formed on PDA. reverse greyish green and light yellow.

Material examined: — OMAN, Oman Botanic Garden, Al-Khod, Muscat, from brown leaf spot of Dracaena serrulate Baker ( Asparagaceae ), 12.201 7, A. Al-Jaradi (SQU H-110, holotype), ex-type culture = SQUCC 14333.

Figures

FIGURE 2. Phaeosphaeriopsis omaniana (ex-type SQUCC 14333). a. Leaf spot on Dracaena serrulate. b, c. Culture grown on PDA. d. Conidiomata sporulating on PDA. e. Conidioma in vertical section. f. Peridium. g. Conidiogenous cells. h. Conidia. Scale bars e,f = 50 μm, g = 10 μm, h = 20 μm.