Pestalotiopsis coffeae-arabicae, 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 : 26-27

Pestalotiopsis coffeae-arabicae Y. Song, K. Geng, K.D. Hyde & Yong Wang bis, sp. nov. ( Fig. 2 ) MycoBank

MB 804967

Differs from related Pestalotiopsis species mainly by its smaller conidia and shorter apical appendages.

Type: — CHINA. Hainan Province: Xinglong County, Tropical Botanical Garden , living leaves of Coffea arabica , 8 March 2012, K . Geng ( HGUP4019 , holotype!) .

Associated with red-brown leaf spots on living leaves of Coffea arabica . Conidiophores usually indistinct. Conidiogenous cells discrete, ampulliform to lageniform, smooth, thin-walled, hyaline, with 2–3 proliferations. Conidia fusoid to ellipsoid, straight to slightly curved, 4-septate, 16–20 × 5–7 µm (n=30, x =18.6 × 6.4 µm); basal cell short, conic to obconic, hyaline, thin-walled and verruculose; three median cells 11.8–13.5 µm long (n=30, x = 12.8 µm), dark brown, septa and periclinal walls darker than the rest of the cell, versicolorous; second cell from base pale brown, 3.5–4.5 µm (n=30, x = 4.1 µm); third cell darker brown, 3.5– 5µm (n=30, x = 4.1µm); fourth cell darker, 3.7–4.5 µm (n=30, x = 4 µm); apical cell 2.4–3.1 µm (n=30, x = 2.7µm), hyaline, obconic to subcylindrical, with 2–4 appendages (mostly 3); apical appendages 11–16 µm long (n=30, x = 13.5 µm), tubular, arising from the apex of the apical cell; basal appendage, 3–5 µm long (n=30, x = 3.5 µm), filiform. Colonies on PDA reaching 7 cm diam. after 8 days at 25° C, with undulate edge, whitish, with aerial mycelium on surface; fruiting bodies black, gregarious; reverse of culture pale luteous.

Habitat/ Distribution: —Known to inhabit Coffea arabica , Hainan Province, China.

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

Other material examined: — CHINA. Hainan Province: Xinglong County, Tropical Botanical Garden , living leaves of Coffea arabica , 8 March 2012, K . Geng ( HGUP4015 !) .

Figures

FIGURE 2. Pestalotiopsis coffeae-arabicae (holotype). a. Herbarium material—leaves of Coffea arabica. b. Conidiomata. c–f. Conidia with versicolorous median cells. g–h. Conidiophores/conidiogenous cells and developing conidia. i–j. Colony on PDA, i. from above, j. from below. Scale bars: c–h=20 µm.