Pyrenochaetopsis paucisetosa N. Valenzuela-Lopez, J. F. Cano, J. Guarro & A. M. Stchigel 2018

Pyrenochaetopsis paucisetosa N. Valenzuela-Lopez, J. F. Cano, J. Guarro & A. M. Stchigel (2018) Fig. 7 Description. Sexual morph undetermined. Asexual morph Conidiomata 128–219 µm, pycnidial, globose to subglobose, dark brown, ostiolate, with dark brown, septate setae, superficial on WA and carnation leaves. Pycnidial wall textura angularis, septate setae, brown, pseudoparenchymatous cells. Conidiogenous cells hyaline, phialidic, smooth-walled, 3.6–5.0 µm × 2.9–4.1 µm (x ̄ = 4.1 × 3.5 µm, n = 30). Conidia hyaline, cylindrical to ellipsoidal, aseptate, with 2 small guttules, 3.7–4.7 µm × 1.5–2.1 µm (x ̄ = 4.2 × 1.8 µm, L / W ratio = 2.4, n = 30). Culture characteristics. Colony exhibit slow growth, reaching 28 mm diam with pale gray, floccose surface, smooth margins, and medium-gray on the reverse side of the colony. Material examined. TAIWAN • Wanrung Township, Hualien County, 23°42'41.2"N, 121°24'41.8"E, serpentine soil in rice field, 2 nd November 2022, K. W Cheng, living culture NTUPPMCC 22-227. Notes. In the present study, strain NTUPPMCC 22-227 identified as Pyrenochaetopsis paucisetosa, clustering in a strongly supported clade (100 % / 1.00) with the type strain of Py. paucisetosa (UTHSC DI 16-193) in multi-gene phylogeny analysis (Fig. 8; Valenzuela-Lopez et al. 2018). Previous reports indicate that Py. paucisetosa has been isolated from a human toe nail in USA (Valenzuela-Lopez et al. 2018) and from freshwater sediment in Korea (Goh et al. 2020). The culture characteristics of NTUPPMCC 22-227 on PDA were similar to those of the ex-holotype of Py. paucisetosa (UTHSC DI 16-193). However, the conidia of Py. paucisetosa NTUPPMCC 22-227 in our study were more elongated than previous reports (x ̄ = 4.2 × 1.8 µm versus 3.6 × 1.9 µm) (Fig. 7; Valenzuela-Lopez et al. 2018; Goh et al. 2020). Furthermore, this is the first record of Py. paucisetosa in Taiwan, as well as its first occurrence in paddy field soil.