Cryptosporella platyphylla C.M. Tian, X.L. Fan & K.D. Hyde, 2016

Fan, Xin-Lei, Du, Zhuo, Hyde, Kevin D., Liang, Ying-Mei, Pan, Yan-Piing & Tian, Cheng-Ming, 2016, Cryptosporella platyphylla, a new species associated with Betula platyphylla in China, Phytotaxa 253 (4), pp. 285-292 : 289

Cryptosporella platyphylla C.M. Tian, X.L. Fan & K.D. Hyde , sp. nov., Fig. 2

MycoBank MB 815811; Facesoffungi number: FoF 01898

Holotype:— BJFC-S1313 . CHINA, Beijing: Tongzhou District, Jingdong Forest Park, 39°59'44.37"N, 116°39'29.16"E, 26 m asl, on twigs and branches of Betula platyphylla , coll. X. L. Fan, 16 May 2015 ( BJFC-S1313 , holotype), ex-type culture, CFCC 50465 .

Etymology:— platyphylla , referring to Betula platyphylla , the only host known for this species.

Host/Distribution:—from Betula platyphylla in China.

Original description:—Sexual morph: Undetermined. Asexual morph: Conidiomatal stromata immersed, slightly erumpent from surface of host branches, separate, discoid to conical, (880–)950–1330(–1460) μm (av. = 1130 μm, n = 20) diam. Stromatic zones lacking. Central column beneath the disc more or less conical, grey to black. Ectostromatic disc dark brown, circular to ovoid (400–)480–610(–790) μm (av. = 560 μm, n = 20) diam. Ostiole one per disc, emerging in central position in the ectostromatic disc. Conidiophores reduced to conidiogenous cells. Conidiogenous cells narrowly cylindrical, smooth, hyaline, producing a conidium at apex. Conidia hyaline, aseptate, cylindrical to clavate, gently curved, (45–)46.5–53(–59) × (3–)3.5–4.5 μm (av. = 51 × 4 μm, n = 50).

Cultures:—Colony growth on PDA initially white, becoming yellowish brown to brownish after 7–10 days. Colony flat, felt-like, with a uniform texture, extending to ca. 66 mm diam at room temperature. Conidiomata absent. Material examined:— CHINA, Beijing: Tongzhou District, Song Village, 39°59’40”N, 116°39’29.31”E, 10 m asl, on twigs and branches of Betula platyphylla , coll. X. L. Fan, 20 March 2015 ( BJFC-S 1314, paratype), ex-paratype culture, CFCC 50466.

Figures

FIGURE 2. Morphology of Cryptosporella platyphylla from Betula platyphylla (BJFC-S1313). A, B: Habit of conidiomata on twig. C: Transverse section of conidioma. D: Longitudinal section through conidioma. E: Conidiophores. F–H: Conidia. I: Colonies on PDA at 30 days. Scale bars: B–D = 500 μm; E–H = 5 μm.