Diaporthe ganzhouensis C.M. Tian & Q. Yang sp. nov. Figure 5

Diagnosis.

Distinguished from the phylogenetically closely-related species D. vawdreyi in having longer conidiophores and wider alpha conidia.

Etymology.

Named after Ganzhou City where the species was first collected.

Description.

On PDA: Conidiomata pycnidial, subglobose, solitary, deeply embedded in the medium, erumpent, dark brown to black. Pale yellow conidial drops exuding from ostioles. Conidiophores (12-)15.5-21 × 1.5-2 μm, cylindrical, hyaline, phiailidic, branched, straight or slightly curved. Alpha conidia 6.5-8.5(-9) × 2-2.5(-3) μm, aseptate, hyaline, ellipsoidal to fusiform, rounded at one end, slightly apex at the other end, biguttulate. Beta conidia hyaline, aseptate, filiform, sinuous at one end, eguttulate, (21.5-)25.5-31(-33) × 1 µm .

Culture characters.

Colony at first white, becoming yellowish with age. Aerial mycelium white, dense, fluffy, with visible solitary conidiomata at maturity.

Specimens examined.

China. Jiangxi Province: Ganzhou City, unknown dead wood, 25°45'17"N, 115°00'41"E, 23 Jul 2018, Q. Yang, Y. Liu, Y.M. Liang & C.M. Tian (holotype BJFC-C004; ex-type culture: CFCC 53087; living culture: CFCC 53088).

Notes.

Diaporthe ganzhouensis comprises the isolates CFCC 53087 and CFCC 53088, revealed to be closely related to D. vawdreyi in the combined phylogenetic tree (Fig. 1). Diaporthe ganzhouensis can be distinguished, based on ITS, tef1-α and tub2 loci from D. vawdreyi (6/456 in ITS, 63/357 in tef1-α and 40/469 in tub2). Diaporthe ganzhouensis differs morphologically from D. vawdreyi in having longer conidiopores (15.5-21 vs. 6-15 μm) and wider alpha conidia (2-2.5 vs. 1.5-2 μm) (Crous et al. 2015).