Diaporthe unshiuensis F. Huang, K.D. Hyde & H.Y. Li, 2015

Yang, Qin, Fan, Xin-Lei, Guarnaccia, Vladimiro & Tian, Cheng-Ming, 2018, High diversity of Diaporthe species associated with dieback diseases in China, with twelve new species described, MycoKeys 39, pp. 97-149 : 97

Diaporthe unshiuensis F. Huang, K.D. Hyde & H.Y. Li, 2015 Figure 17

Description.

On PNA: Conidiomata pycnidial, globose or rostrated, black, erumpent in tissue, erumpent at maturity, 260-500 μm diam, often with translucent conidial drops exuding from the ostioles. Conidiophores 18-28.5 × 1.4-2.1 μm, cylindrical, hyaline, branched, septate, straight or curved, tapering towards the apex. Alpha conidia abundant in culture, hyaline, aseptate, ellipsoidal to fusiform, biguttulate, sometimes with one end obtuse and the other acute, 6.5-8.5 × 2.1-2.5 μm (av. = 7.8 × 2.3 μm, n = 30). Beta conidia not observed.

Culture characters.

Cultures incubated on PNA at 25 °C in darkness. Colony entirely white at surface, reverse with pale brown pigmentation, white, fluffy aerial mycelium.

Specimens examined.

CHINA. Jiangsu Province: Nanjing city, on non-symptomatic twigs of Carya illinoensis , 10 Nov. 2015, Q. Yang, living culture CFCC 52594 and CFCC 52595 (BJFC-S1476).

Notes.

Diaporthe unshiuensis was originally described from twigs of non-symptomatic Fortunella margarita in Zhejiang Province, China ( Huang et al. 2015). In the present study, two isolates from twigs of asymptomatic Carya illinoensis were congruent with D. unshiuensis based on morphology and DNA sequences data (Fig. 1). We therefore describe D. unshiuensis as a known species for this clade.