Stagonosporopsis rhizophilae sp. nov. (Didymellaceae, Pleosporales), a new rhizospheric soil fungus associated with Populus deltoides Marsh Author Wei, Huanshen 0000-0001-5810-8813 State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China. & Nanjing Forestry University, Nanjing, China. & Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China. weihuanshen_2015@163.com Author He, Xinghua 0000-0002-9325-6683 State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China. & Nanjing Forestry University, Nanjing, China. & Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China. xinghuahe@126.com Author Riccardo, Baroncelli 0000-0002-5878-1159 Instituto Hispano-Luso de Investigaciones Agrarias (CIALE), University of Salamanca, Calle del Duero, 12; 37185 Villamayor (Salamanca), Spain. riccardobaroncelli@gmail.com Author Yang, Yuzhan 0000-0002-4206-7495 State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China. & Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China. yyzhan@mail.ustc.edu.cn Author Yuan, Zhilin 0000-0002-5799-8401 State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing, China. & Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China. yuanzl@caf.ac.cn text Phytotaxa 2021 2021-03-17 491 1 23 34 http://dx.doi.org/10.11646/phytotaxa.491.1.3 journal article 305264 10.11646/phytotaxa.491.1.3 9307b9f8-d758-4178-8dac-5c92e4033f99 1179-3163 5757647

TABLE 2 Comparison of morphological characters of S. rhizophilae sp. nov., S. nemophilae, S. ajacis, and S. adonidicola.

Features	S. rhizophilae sp. nov.	S. nemophilae	S. ajacis	S. adonidicola
			(Boerema et al. 2004)	(Li et al. 2006)
MEA	65–70 mm	65–75mm	73–77 mm	*
OA	55–66 mm	65–75mm	72–75 mm	70 mm
CA	53–63 mm	*	74–81 mm	*
PDA	53–74 mm	*	*	*
Pycnidium	140–280μm, 3–5 layers	60–260μm, with 1–5	130–300 μm, with one or	115-–180 μm (in vivo); 100–150
	of cells, outer layers	papillate ostioles	two ostioles, occasionally	μm (in vitro); Sclerotia: 50–100
	pigmented		papillate (in vitro)	μm; 2-3 cells thick
Conidiogenous cells	3.0–6.8×5.5–10.0 μm	Conidiogenous cells	4–6 × 4–6 μm	*
	(x =7.1±1.3×4.3±1.0	4–6×4–6mm.
μm, n=10).
Conidia	4.2–6.8×1.0–2.6 μm	Conidia cylindrical–	3.5–5.5 × 1.5–2.5 μm;(in	5.0–7.5× 2.0–2.5 μm (in vivo)
	(x =5.6±0.8×1.7±0.5	allantoid, with	vitro)	5.0–6.25 × 2.5–3.0 μm;
	μm, n=30);	several small,		Chlamydospores:12.5–20 μm
		scattered guttules,		(in vitro)
		mainly aseptate,
		4–9.5×1.5–2.5μm;
		1–septate conidia up to
		12×3.5μm, sparse
NaOH test	Negetive	Positive, greenish spots	Positive, yellow-green, or	Positive, a blue green
		later becoming red (E+	green with red margin.	discoloration of the agar,
		reaction)		changing to brown red.