Melanconiella cornuta C.M. Tian & Z. Du, 2017

Du, Zhuo, Fan, Xin-Lei & Tian, Cheng-Ming, 2017, Host and geographic range extensions of Melanconiella, with a new species M. cornuta in China, Phytotaxa 327 (3), pp. 252-260 : 257

Melanconiella cornuta C.M. Tian & Z. Du , sp. nov., Fig. 2

MycoBank MB 823037

Holotype:— BJFC-S1375 . CHINA, Shaanxi: Ankang City, Ningshan County, Huoditang , 33°26’04.46”N, 108°26’59.91”E, 1610 m asl, on twigs and branches of Cornus controversa , coll. X. L. Fan, 3 July 2016 ( BJFC-S1375 , holotype), ex-type culture, CFCC 51990 .

Etymology:— cornuta , referring to Cornus controversa , the new host known for this species.

Host/Distribution:—from Cornus controversa and Juglans regia in China.

Original description:—Sexual morph: Undetermined. Asexual morph: Pycnidial storma yellow, immersed, conical, with a single locule, necks erumpent through the host bark, tissue around the necks is rostrate, (250–)270– 330(–410) μm (av. = 300 μm, n = 20) diam. Stromatic zones lacking. Conidiophores reduced to conidiogenous cells, 17.5–23.5(–25) × 2.5–4(–4.5) μm (av. = 22 × 3.5 μm, n = 50). Conidiogenous cells cylindrical, smooth, hyaline, conidia are produced at apex. Conidia hyaline, aseptate, cylindrical to ellipsoidal, (18–)19–22.5(–23.5) × (8–)8.5–10(–11) μm (av. = 21.5 × 10 μm, n = 50), with distinct hyaline sheath (1.5–)2–2.5 μm (av. = 2 μm, n = 20).

Cultures:—Colony growth on PDA originally white, becoming pale yellowish after 7–10 days. Colony flat, feltlike, with a uniform texture, and yellowish to dark brown conidiomata irregular on the medium surface.

Material examined:— CHINA, Shaanxi: Ankang City, Ningshan County, Huoditang, 36°26’13.30”N, 108°26’48.32”E, 1432 m asl, on twigs and branches of Juglans regia , coll. Q. Yang, 3 Auguest 2015 ( BJFC-S 1345, paratype), ex-paratype culture, CFCC 51991.

Figures

FIGURE 2. Morphology of Melanconiella cornuta from Cornus controversa (BJFC-S1375). A, B: Habit of conidiomata on twig. C: Transverse section of conidioma. D: Longitudinal section through conidioma. E: Conidiogenous cells. F, G: Conidia. Scale bars:A=1 cm; B–D = 300 μm; E–G = 10 μm.