Morphological and phylogenetic analyses reveal one new genus and six new species in Irpicaceae and Steccherinaceae (Polyporales, Basidiomycota) from the Yunnan – Guizhou Plateau, Asia Author Deng, Yinglian 0000-0002-8220-508X College of Forestry, Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, China Author Chen, Meng https://orcid.org/0009-0005-9916-8704 College of Forestry, Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, China Author Wang, Kaisheng https://orcid.org/0009-0007-4840-816X College of Forestry, Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, China Author Liu, Wanting https://orcid.org/0009-0008-6281-8904 College of Forestry, Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, China Author Chen, Daxiang https://orcid.org/0009-0001-2309-1991 College of Forestry, Southwest Forestry University, Kunming 650224, China Author Yang, Shunqiang 0000-0003-1476-9040 Yunnan Tongbiguan Provincial Nature Reserve, Mangshi 679319, China Author Li, Wenli College of Forestry, Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, China Author Zhou, Hongmin 0000-0002-0724-5815 College of Forestry, Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, China Author Zhao, Changlin 0000-0002-8668-1075 College of Forestry, Key Laboratory of Forest Disaster Warning and Control in Universities of Yunnan Province, Southwest Forestry University, Kunming 650224, China & Yunnan Key Laboratory of Gastrodia and Fungal Symbiotic Biology, Zhaotong University, Zhaotong 657000, China text IMA Fungus 2025 2025-12-29 16 e 172367 e 172367 journal article 313600 10.3897/imafungus.16.172367 2f65fe25-0cf7-4bde-aff6-7d359c5504a7

Table 2. A morphological comparison species of Efibula and Phanericium.

Species	Type locality	Basidiomata	Generative hyphae	Cystidia and cystidoles	Basidia (µm)	Basdiospores (µm)	Host trees	References
Efibula aurata	Union of South Africa	Broadly effuse	Simple septate, thin-walled	Absent	Clavate to broadly clavate, 25–40 × 6–8.5 µm	Ellipsoid, 7.5–9 × 4.5–5.5 µm	On unidentified wood	Zmitrovich et al. (2006)
E. avellanea	France	Resupinate, smooth	Simple septate, thin- to slightly thick-walled	Absent	Narrowly clavate, 25–30 × 4–5 µm	Ellipsoid, 5–7 × 2.5–3.5 µm	On Quercus	Wu (1990)
E. bubalina	Canary Islands	Broadly effuse	Simple septate, slightly thick-walled	Absent	Clavate, 30–42 × 7–9 µm	Ellipsoid to broadly ellipsoid, 8.5–9.5 × 5.5–6.5 µm	On deciduous wood	Zmitrovich et al. (2006)
E. candidissima	China	Resupinate, smooth	Simple septate, thin-walled	Absent	Clavate, 20–25 × 4–6 μm	ellipsoid to oblong ellipsoid, 4.8–5.8 × 3.3–4 μm	On rotten angiosperm wood	Zhang et al. (2025)
E. clarkii	Unites States of America	Resupinate, slightly tuberculate	Simple septate, thin-walled	Absent	Clavate, 25–39 × 5–7.5 μm	Oblong to ellipsoid, 6.0–7.0 × 3.0–3.5	On fallen Quercus sp. branch	Floudas and Hibbett (2015)
E. cordylines	New Zealand	Effused, smooth	Simple septate, thin- to thick-walled	Absent	Clavate, 25–35 (– 45) × 5–6 µm	Broadly ellipsoid to ellipsoid, 6–7.5 × 3.5–4.5	On hardwood branches	Zmitrovich et al. (2006)
E. corymbata	New Zealand	Resupinate, smooth	Simple septate, thin-walled	Absent	Clavate, 35–40 × 6.5–8.5 µm	Narrowly ellipsoid, 8–9.5 × 3.5–4.5 µm	On hardwood branches	Zmitrovich et al. (2006)
E. cremea	China	white to cream, grandinioid	Simple septate, thin- to thick-walled	Absent	Clavate, 17.5–25 × 5–7.5 µm	Ellipsoid, 4.7–5.7 × 3.3–4	On fallen angiosperm branch	Li et al. (2025 a)
E. daweishanensis	China	Resupinate, grandinoid	Simple septate, thin-walled	Absent	Clavate, 14–19 × 5–6.5 µm	Elliposoid, 6–7.5 × 3.5–4.8	On fallen angiosperm branch	Dong et al. (2024)
E. deflectens	Finland	Resupinate, effused, smooth, or warted with small papillae	Simple septate, thin-walled	Absent	Clavate, 25–35 × 3–5 µm	Ellipsoid, 4–5 × 2.5–3 µm	on Picea abies and manufactured wood.	Wu (1990)
E. glossophora	China	Resupinate, smooth	Simple septate, thin- to slightly thick-walled	Absent	Long clavate, 21.5–26.7 × 5.7–7.4 µm	Ellipsoid, 3.8–6 × 2.6–3.7 µm	On fallen angiosperm branch	Gu et al. (2025)
E. gracilis	Unites States	Resupinate, smooth	Simple septate, thin-walled	Absent	Cylindrical to clavate, 17–30 × 5–6.5 µm	Ellipsoid to oblong, 5.5–7 × 3.3–4	On fallen branch	Floudas and Hibbett (2015)
E. grandinosa	China	Resupinate, grandinioid	Simple septate, thin- to slightly thick-walled		Clavate, 36–43 × 5–7 µm	Ellipsoid, 6–6.8 × 3.7–4 µm	On dead angiosperm branch	Li et al. (2022)
E. hainanensis	China	Resupinate, smooth	Simple septate, thin- to slightly thick-walled	Cystidia subfusiform to subcylindrical	Clavate, 15–26 × 4–6 µm	Ellipsoid to broadly ellipsoid, 4.2–5.5 × 2.8–3.2	On dead liana	Li et al. (2022)
E. intertexta	China	Effused, smooth	Simple septate, thin- to slightly thick-walled	Absent	Narrowly clavate, 30–35 × 4.5–5 μm	Cylindrical, 5.6–6.4 × 2.2–2.6 μm	On angiosperm branch	Chen et al. 2021
E. matsuensis	China	Effused, smooth	simple septate, thick walled	Absent	Clavate, 18–25 × 6.5–8 μm	Ellipsoid to cylindrical, 7.4–8.6 × 3.8–4.4 μm	On angiosperm branch,	Chen et al. (2021)
E. murina	China	Resupinate, tuberculate	Simple septate, thin- to slightly thick-walled	Absent	Clavate, 15–24 × 4–6 µm	Ellipsoid, 4–5.5 × 2.5–3 µm	On fallen angiosperm branch	Present study
E. punctata	China	Resupinate, smooth	Simple septate, thin-walled	Cystidoles subfusiform	Subcylindrical to subclavate, 11.8–19.4 × 3.7–5.9 µm	Ellipsoid, 4.3–6.2 × 2.2–3.3	On fallen angiosperm branch	Dong et al. (2024)
E. shenghuae	China	Smooth to grandinioid	Simple septate, slightly thick-walled	Absent	Clavate, 23–38 × 4.5–7 µm	Oblong ellipsoid, 6–6.5 × 3–3.5	On dead branch of Quercus	Li et al. (2022)
E. tropica	China	Effused, smooth	Simple septate, thin-walled	Cystidioles fusiform	Clavate to narrowly clavate, 27–40 × 5.5–8 μm	Broadly ellipsoid, 6.4–7.7 × 3.7–4.4 μm	On decaying angiosperm branch	Chen et al. (2021)
E. turgida	China	Resupinate, smooth	Simple septate, thin-walled	Absent	Clavate to subclavate, 26–30 × 6.5–7 μm	Cylindrical, 6.6–8.2 × 3.3–3.9 μm	On angiosperm branch	Chen et al. (2021)
E. verruculosa	Tanzania	Resupinate, grandinioid to odontoid	Simple septate, thin-walled	Absent	Clavate, 15–20 × 5 µm	Ellipsoid to subcylindrical, 4–4.5 × 2–2.5 µm	—	Kotiranta and Saarenoksa (1993)
E. yaoshanensis	China	Resupinate, smooth	Simple septate, thin-walled	Absent	Long clavate, 20–27 × 4–6 µm	Ellipsoid, 5–6.5 × 3–4 µm	On fallen angiosperm branch	Present study
E. yunnanensis	China	Resupinate, smooth	Simple septate, thin-walled	Absent	Clavate, 25–31 × 6–7.5 µm	Ellipsoid, 5.5–7.5 × 3.6–4.5	On fallen branch of angiosperm	Ma et al. (2020)
E. zhaotongensis	China	Resupinate, grandinioid	Clamped, thin-walled,	Absent	Clavate, 17–25 × 4–5 µm	Cylindrical, 4–5.5 × 2–3.5 µm	On fallen angiosperm branch	Present study
P. americanum	Unites States	Resupinate, smooth to reticulate	Clamped, thin-walled	Absent	Cylindrical to clavate, 20–32 × 5–8 µm	Ellipsoid to cylindrical, 5.3–6.5 × 3–3.8 µm	—	Floudas and Hibbett (2015)
P. bambusacearum	China	Resupinate, smooth	Simple septate, thin-walled	Absent	Long clavate, 41–60 × 6–9 µm	Subglobose, 4.5–7 × 3.5–5 µm	On the dead bamboo	Present study
P. gemellum	Norway	Effused, smooth	Simple septate, thin- to slightly thick-walled	Absent	Long clavate, 19–40 × 5.2–7.4 μm	Narrowly ellipsoid to ellipsoid, 5.2–7.8 × 3.1–4.7 μm	On angiosperm wood	Larsson et al. (2025)
P. rodriguezarmasiae	Spain	Resupinate, effuse, smooth to tuberculate	Clamped, thin-walled	Absent	Claviform, 35–48 × 6–8 µm	Ellipsoid, 6–7 × 4–5 µm	On Euphorbia regis-jubae	Boonmee et al. (2021)
P. subglobisporum	China	Effused, smooth	Simple septate, thin- to slightly thick-walled	Absent	Clavate, 30–40 × 6.5–8 μm	Broadly ellipsoid to subglobose, 6.4–8.1 × 4.5–5.8 μm	On angiosperm branch	Chen et al. (2021)
P. taiwanense	China	Resupinate, smooth	Simple septate, thin- to slightly thick-walled	Absent	Clavate to subcylindrical, 24–44 × 6–8 µm	Broadly ellipsoid to ovoid, 5.8–6.5 × 4–4.5 µm	On dead angiosperm branch	Li et al. (2022)
P. tuberculatum	Finland	Effused, smooth	Simple septate, thin- to slightly thick-walled	Absent	Narrowly clavate, 25–35 × 4–5 µm	Ellipsoid, 5–7 × 3–4 µm	On angiosperm wood and gymnosperm	Chen et al. (2021)