Pestalotiopsis rhodomyrtus, Song & Geng & Zhang & Hyde & Zhao & Wei & Kang & Wang, 2013

Song, Yu, Geng, Kun, Zhang, Bin, Hyde, Kevin D., Zhao, Wen-Sheng, Wei, Ji-Guang, Kang, Ji-Chuan & Wang, Yong, 2013, Two new species of Pestalotiopsis from Southern China, Phytotaxa 126 (1), pp. 22-30 : 27

Pestalotiopsis rhodomyrtus Y. Song, K. Geng, K.D. Hyde & Yong Wang bis, sp. nov. ( Fig. 3 ) MycoBank MB

804968

Differs from Pestalotiopsis rosea and P. adusta by bigger conidia and its apical appendages, which are shorter than those of P. trachicarpicola and P. rosea .

Type: — CHINA. Guangxi Province: Liangfeng River National Forest Park, isolated from leaves of Rhodomyrtus tomentosa, 2011, J.G. Wei ( HGUP4230 , holotype!) .

Conidiophores indistinct. Conidiogenous cells discrete, hyaline, simple, filiform. Conidia 19.7–26.3 × 4.9–6.7 µm (n=30, x =23.00 × 5.76 µm), fusoid, straight to slightly curved, 4-septate; basal cell conic to obconic, hyaline or pale brown, smooth, thin-walled, 3.6–6.4 µm long (n=30, x = 4.79 µm); three median cells 12.9– 16.8 µm long (n=30, x = 15.04 µm), brown, septa and periclinal walls darker than the rest of the cell, concolorous, verruculous; second cell from base 4.3–5.8 µm long (n=30, x = 5.12 µm); third cell from base 3.5–5.7 µm long (n=30, x = 4.73 µm); fourth cell from base 4.3–5.6 µm long (n=30, x = 4.88 µm); apical cell hyaline, obconic to subcylindrical, 2.7–4.1 µm long (n=30, x = 3.56 µm); with 2–3 tubular appendages, arising from the apex of the apical cell, 7.5–14.9 µm long (n=30, x = 10.54 µm), unequal; one basal appendage present, 2.8–4.9 µm long (n=30, x = 3.65 µm), filiform.

Colonies on PDA reaching 7 cm diam. after 8 days at 25°C, with edge crenate, whitish, aerial mycelia on surface, fruiting bodies black, gregarious; reverse of colony pale orange.

Etymology: —In reference to the host, Rhodomyrtus tomentosa, from which this fungus was first isolated.

Habitat/Distribution: —Known to inhabit Rhodomyrtus tomentosa, Guangxi Province, China.

Figures

FIGURE 3. Pestalotiopsis rhodomyrtus (holotype). a–e. Conidia with concolorous median cells. f–g. Conidiophores/conidiogeous cells and developing conidia. h–i. Colony on PDA, h. from above, i. from below. Scale bars: a–g=20 µm.