Diaporthe liupanshuiensis C. G. Ren, 2025

Diaporthe liupanshuiensis C. G. Ren sp. nov.

Fig. 6 View Figure 6

Diagnosis.

Distinguished from the phylogenetically closely related species D. podocarpi-macrophylli by its shorter alpha conidia.

Etymology.

Referring to the locality of the holotype, Liupanshui City, Guizhou Province, China.

Description.

Conidiomata: pycnidial, spherical or conical, black, and scattered and secrete irregular yellow conidial horns at the top when mature. Conidiophores reduce to conidiogenous cells. Conidiogenous cells: colorless, transparent, upright, elongate cylindrical; size, 18.1–40.4 × 1.2–2.5 um (mean = 30 × 1.8, n = 30). Alpha conidia:. transparent, smooth, undivided, cylindrical to fusiform, sharp at both ends or round at one end, and slightly sharp at one end; size, 2.5–6.9 × 1.1–2.7 um (mean = 5.4 × 2.2, n = 50). Beta conidia: not observed.

Culture characteristics.

After 15 days of culture on PDA in the dark at 25 ° C, the surface of the colony was white and the opposite side was light brown, with one or more concentric rings.

Holotype.

China • The Guizhou Province: Liupanshui City ( 26°27'18.35"N, 105°02'45.60"E), from kiwifruit soft rot, October 11, 2023, Chunguang Ren ( holotype GZMHT SC- 18.; ex-type living SC- 18; living culture: SC- 19 and SC- 20). GoogleMaps

Notes.

The three strains of D. liupanshuiensis sp. nov. were clustered into an independent clade with a close relationship with D. podocarpi-macrophylli and D. pseudooculi with high bootstrap value (0.94 BI). Compared with the typical characteristics of the known species (Table 2 View Table 2 ), D. liupanshuiensis sp. nov. differs from D. podocarpi-macrophylli and D. pseudooculi in that it possesses smaller alpha conidia (2.5–6.9 × 1.1–2.7 um vs. 3.5–8.5 × 3 um and 6–9 × 2–3.5 um). Thus, the morphological characteristics and molecular phylogenetic results support D. liupanshuiensis as a new species.