identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
9CC10672DBDB513C84F6B350F3BDD381.text	9CC10672DBDB513C84F6B350F3BDD381.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron album Q. Yuan & C. L. Zhao 2026	<div><p>Basidiodendron album Q. Yuan &amp; C. L. Zhao sp. nov.</p><p>Figs 3, 4, 5</p><p>Diagnosis.</p><p>Basidiodendron album differs from other species in the genus by its smooth, white when fresh, white to cream upon drying hymenial surface and spiny, globose basidiospores.</p><p>Etymology.</p><p>Album (Lat.). Referring to the white basidiomata of the type specimen.</p><p>Type.</p><p>CHINA • Yunnan Province, Zhaotong, Xiaocaoba Town, Wumengshan National Nature Reserve, 27°77'N, 104°29'E, elevation 2,900 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 21 Sep. 2023, CLZhao 33842 (SWFC 00033842, holotype) .</p><p>Description.</p><p>Basidiomata annual, resupinate, closely adnate, membranous, without odor or taste when fresh, up to 6 cm long, 1 cm wide, and 50–100 µm thick. Hymenial surface smooth, white when fresh, white to cream upon drying. Sterile margin narrow, white, up to 1 mm. Hyphal system monomitic; generative hyphae with clamp connections, colorless, thin-walled, smooth, rarely branched, interwoven, 1.5–2.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Leptocystidia clavate, colorless, thin-walled, smooth, 8.5–21.5 × 3–5.5 µm. Hyphidia arising from generative hyphae, nodulose, rarely branched, colorless, thin-walled, 1–2.5 µm in diameter. Basidia narrowly ovoid to ellipsoid, longitudinally septate, four-celled, 14–15.5 × 9–11.5 µm, involucres absent. Basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores globose, colorless, thin-walled, spiny, usually with oil drops, IKI –, CB –, 7–9 (– 10) × (6 –) 6.5–8.5 (– 9) µm, L = 8.10 µm, W = 7.57 µm, Q = 1.07–1.12 (n = 60 / 2).</p><p>Additional specimen examined (Paratype).</p><p>CHINA • Yunnan Province, Zhaotong, Xiaocaoba Town, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.85&amp;materialsCitation.latitude=27.783333" title="Search Plazi for locations around (long 103.85/lat 27.783333)">Wumengshan National Nature Reserve</a>, 27°47'N, 103°51'E, elevation 1,650 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 21 Sep. 2023, CLZhao 50615 (SWFC 00050615) .</p><p>Notes.</p><p>The combined ITS + nrLSU + TEF 1 phylogenetic analysis revealed that Basidiodendron album (CLZhao 33842, CLZhao 50615) formed a single lineage with strong support (100 % ML, 1.00 BPP) and grouped with B. arachnoideum and B. spiculosum (L. S. Olive) Wojewoda (Fig. 2). However, B. arachnoideum can be distinguished from B. album by its arachnoid to farinaceous basidiomata with a grandinioid hymenial surface and its smaller basidiospores (3.5–4 × 3–3.5 µm vs. 7–9 × 6.5–8.5 µm). The key characters distinguishing B. spiculosum from B. album are its waxy basidiomata with a pruinose-reticulate hymenial surface and larger cystidia (28–51 × 6.8–10 µm vs. 8.5–21.5 × 3–5.5 µm; Spirin et al. 2021). Morphologically, B. album resembles three taxa, viz., B. alni Spirin &amp; Malysheva, B. caucasicum Spirin, Malysheva &amp; Kotiranta, and B. cinerellum (Bourdot &amp; Galzin) Spirin &amp; Malysheva, in having a smooth hymenial surface. However, B. alni differs from B. album by its pruinose basidiomata and smaller basidiospores (4.1–5 × 4.2–5 µm vs. 7–9 × 6.5–8.5 µm; Spirin et al. 2020). Basidiodendron caucasicum can be separated from B. album by its reticulate basidiomata and smaller basidiospores (4–5.1 × 3.4–4.5 µm vs. 7–9 × 6.5–8.5 µm; Spirin et al. 2020). Basidiodendron cinerellum is distinct from B. album in having pruinose-reticulate basidiomata and shorter basidiospores (4.9–7.2 × 5.2–7.7 µm vs. 7–9 × 6.5–8.5 µm; Spirin et al. 2021).</p></div>	https://treatment.plazi.org/id/9CC10672DBDB513C84F6B350F3BDD381	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
73A69712FE08569E9709FF2BDC125C83.text	73A69712FE08569E9709FF2BDC125C83.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron arachnoideum Q. Yuan & C. L. Zhao 2026	<div><p>Basidiodendron arachnoideum Q. Yuan &amp; C. L. Zhao sp. nov.</p><p>Figs 6, 7, 8</p><p>Diagnosis.</p><p>Basidiodendron arachnoideum is characterized by its arachnoid to farinaceous basidiomata, grandinoid and white to slightly cream hymenial surface, as well as ellipsoid to short clavate basidia lacking longitudinal septa.</p><p>Etymology.</p><p>Arachnoideum (Lat.). Referring to the arachnoid hymenial surface of the type specimen.</p><p>Type.</p><p>CHINA • Yunnan Province, Tengchong, Tuantian Town, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=98.55&amp;materialsCitation.latitude=24.716667" title="Search Plazi for locations around (long 98.55/lat 24.716667)">Gaoligong Mountain National Nature Reserve</a>, 24°43'N, 98°33'E, elevation 1,360 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 7 Jul. 2024, CLZhao 39268 (SWFC 00039268, holotype) .</p><p>Description.</p><p>Basidiomata annual, resupinate, adnate, arachnoid to farinaceous, without odor or taste when fresh, up to 9 cm long, 4 cm wide, and up to 100 µm thick. Hymenial surface grandinoid, white when fresh, turning white to slightly cream upon drying. Sterile margin narrow, white, up to 1 mm. Hyphal system monomitic; generative hyphae with clamp connections, colorless, thin-walled, smooth, interwoven, 1–1.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Leptocystidia clavate, colorless, thin-walled, smooth, 9.5–12 × 2.5–4 µm. Basidia ellipsoid to short clavate, with four sterigmata and a basal clamp connection, 7.5–8.5 × 5–5.5 µm, involucres absent. Basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores subglobose, with a short, often eccentric and asymmetric apiculus, colorless, thin-walled, smooth, usually with one oil drop, IKI –, CB –, (3 –) 3.5–4 × 3–3.5 µm, L = 3.55 µm, W = 3.28 µm, Q = 1.08–1.10 (n = 60 / 2).</p><p>Additional specimen examined (Paratype).</p><p>CHINA • Yunnan Province, Tengchong, Tuantian Town, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=98.7&amp;materialsCitation.latitude=26.933332" title="Search Plazi for locations around (long 98.7/lat 26.933332)">Gaoligong Mountain National Nature Reserve</a>, 26°56'N, 98°42'E, elevation 1,580 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 7 Jul. 2024, CLZhao 50722 (SWFC 00050722) .</p><p>Notes.</p><p>The combined ITS + nrLSU + TEF 1 phylogenetic analysis revealed that Basidiodendron arachnoideum was resolved as sister to B. spiculosum (Fig. 2). However, B. spiculosum can be delimited from B. arachnoideum by its waxy basidiomata with a smooth hymenial surface and spiny, larger basidiospores (6.9–8.2 × 7.1–8.9 µm vs. 3.5–4 × 3–3.5 µm; Spirin et al. 2021). Morphologically, B. arachnoideum resembles several taxa, viz., B. alni, B. cinerellum, and B. glaucum Spirin &amp; K. H. Larss., in having farinaceous basidiomata. However, B. alni is distinct from B. arachnoideum by having a smooth hymenial surface and larger basidiospores (4.1–5 × 4.2–5 µm vs. 3.5–4 × 3–3.5 µm; Spirin et al. 2020). Basidiodendron cinerellum differs from B. arachnoideum by its smooth hymenial surface and larger basidiospores (4.9–7.2 × 5.2–7.7 µm vs. 3.5–4 × 3–3.5 µm; Spirin et al. 2021). Basidiodendron glaucum can be separated from B. arachnoideum by its smooth hymenial surface and larger basidiospores (5.1–6.8 × 5.2–7 µm vs. 3.5–4 × 3–3.5 µm; Spirin et al. 2021).</p><p>The generic concept of Basidiodendron has historically relied heavily on specific basidial morphologies, particularly the presence of longitudinally septate basidia. Interestingly, re-examination of B. arachnoideum revealed an absence of longitudinal septa in its mature basidia (Fig. 8). While this might traditionally exclude it from the genus, the phylogeny inferred from the ITS + nrLSU + TEF 1 sequence data securely nests B. arachnoideum within the well-supported main Basidiodendron clade (Fig. 2). As demonstrated in the phylogenetic tree, this species forms a distinct lineage separate from the type species. This finding indicates that structural features such as basidial septation may undergo secondary loss during the evolutionary radiation of specific clades within the genus. Consequently, molecular phylogeny provides a more reliable basis for the generic placement of such morphologically atypical taxa than reliance solely on individual morphological traits.</p></div>	https://treatment.plazi.org/id/73A69712FE08569E9709FF2BDC125C83	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
F293B30CF587520487851A496A9447C4.text	F293B30CF587520487851A496A9447C4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron dehongense Q. Yuan & C. L. Zhao 2026	<div><p>Basidiodendron dehongense Q. Yuan &amp; C. L. Zhao sp. nov.</p><p>Figs 9, 10, 11</p><p>Diagnosis.</p><p>Basidiodendron dehongense differs from other species by its slightly olivaceous to buff hymenial surface, subclavate cystidia, and broadly ellipsoid to subglobose basidiospores.</p><p>Etymology.</p><p>Dehongense (Lat.). Referring to the type locality, Dehong, Yunnan Province, China.</p><p>Type.</p><p>CHINA • Yunnan Province, Dehong, Ruili City, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=97.51667&amp;materialsCitation.latitude=24.183332" title="Search Plazi for locations around (long 97.51667/lat 24.183332)">Tongbiguan Provincial Nature Reserve</a>, 24°11'N, 97°31'E, elevation 1,945 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 3 Nov. 2024, CLZhao 42161 (SWFC 00042161, holotype) .</p><p>Description.</p><p>Basidiomata annual, resupinate, closely adnate, membranaceous, without odor or taste when fresh, up to 10 cm long, 5 cm wide, and up to 100 µm thick. Hymenial surface smooth, slightly olivaceous to buff when fresh, turning to buff to cream upon drying. Sterile margin narrow, buff, up to 1 mm. Hyphal system monomitic; generative hyphae with clamp connections, colorless, thin-walled, smooth, interwoven, 2–4 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Leptocystidia subclavate, colorless, thin-walled, smooth, 18.5–28 × 3.5–6.5 µm. Hyphidia arising from generative hyphae, nodulose, rarely branched, colorless, thin-walled, 1–2.5 µm in diameter. Basidia ellipsoid to ovoid, longitudinally septate, two- to four-celled, 10.5–13.5 × 7–10 µm, involucres well developed, often totally covering basidial cells. Basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores broadly ellipsoid to subglobose, colorless, thin-walled, smooth, usually with one or more oil drops, IKI –, CB –, 5.5–7.5 × 4.5–6.5 µm, L = 6.46 µm, W = 5.33 µm, Q = 1.17–1.21 (n = 60 / 2).</p><p>Additional specimen examined (Paratype).</p><p>CHINA • Yunnan Province, Dehong, Ruili City, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=98.1&amp;materialsCitation.latitude=25.35" title="Search Plazi for locations around (long 98.1/lat 25.35)">Tongbiguan Provincial Nature Reserve</a>, 25°21'N, 98°06'E, elevation 1,600 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 3 Nov. 2024, CLZhao 50617 (SWFC 00050617) .</p><p>Notes.</p><p>Basidiodendron dehongense was shown to group within Basidiodendron in a sister relationship to B. luteogriseum in the combined ITS + nrLSU + TEF 1 phylogenetic inference (Fig. 2). However, B. luteogriseum differs from B. dehongense by its pruinose hymenial surface and shorter basidiospores (4.1–5.1 × 4–5.1 µm vs. 5.5–7.5 × 4.5–6.5 µm; Spirin et al. 2020). Morphologically, B. dehongense resembles B. cinerellum, B. groningae Schoutt. &amp; Spirin, and B. inconspicuum Spirin &amp; Malysheva by having a smooth hymenial surface. However, B. cinerellum can be separated from B. dehongense by its pruinose basidiomata and warted basidiospores (Spirin et al. 2021). Basidiodendron groningae is distinct from B. dehongense by its pruinose-reticulate basidiomata and spiny, narrower basidiospores (6–7.9 × 6.2–8.2 µm vs. 5.5–7.5 × 4.5–6.5 µm; Spirin et al. 2021). Basidiodendron inconspicuum is separated from B. dehongense by its pruinose-reticulate basidiomata and minutely warted basidiospores (Spirin et al. 2021).</p></div>	https://treatment.plazi.org/id/F293B30CF587520487851A496A9447C4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
F09A3B4DE39853748FA5CCDB99BC98DC.text	F09A3B4DE39853748FA5CCDB99BC98DC.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron eyrei (Wakef.) Luck-Allen	<div><p>Basidiodendron eyrei (Wakef.) Luck-Allen</p><p>≡ Sebacina eyrei Wakef., Trans. Br. mycol. Soc. 5: 126 (1915). United Kingdom, England, Hampshire, Alresford, on decorticated log of Fagus sylvatica, 7. V. 1914, comm. Rev. W. Eyre (syntype designated here K, no. K-M 000049486; isolectotype PC, no. 0084215). Mycobank typification identifier: MBT 10033155 .</p><p>= Bourdotia eyrei (Wakef.) Wakef. ex Bourdot &amp; Galzin.</p><p>Note.</p><p>The phylogenetic study of the Auriculariales conducted by Weiss and Oberwinkler (2001) showed that five Basidiodendron species formed a single cluster, although without statistical support. As discussed below, the monophyly of Basidiodendron still cannot be confirmed.</p></div>	https://treatment.plazi.org/id/F09A3B4DE39853748FA5CCDB99BC98DC	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
968FC994FDF05BF497CAB4731863C419.text	968FC994FDF05BF497CAB4731863C419.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron fragilissimum Q. Yuan & C. L. Zhao 2026	<div><p>Basidiodendron fragilissimum Q. Yuan &amp; C. L. Zhao sp. nov.</p><p>Figs 12, 13, 14</p><p>Diagnosis.</p><p>Basidiodendron fragilissimum differs from other species by its olivaceous, smooth hymenial surface, broadly globose to subglobose with a short, often eccentric and asymmetric apiculus basidiospores.</p><p>Etymology.</p><p>Fragilissimum (Lat.). Referring to the fragile basidiomata of the type specimen.</p><p>Type.</p><p>CHINA • Yunnan Province, Dehong, Longchuan County, Tongbiguan Provincial Reserve, 24°32'N, 97°68'E, elevation 1,807 m asl., on dead bamboo, leg. C. L. Zhao, 3 Oct. 2025, CLZhao 49840 (SWFC 00049840, holotype) .</p><p>Description.</p><p>Basidiomata annual, resupinate, closely adnate, membranaceous, without odor or taste when fresh, up to 15 cm long, 7 cm wide, and up to 50 µm thick. Hymenial surface smooth, slightly olivaceous when fresh, turning to slightly olivaceous to slightly brown upon drying, fragile. Sterile margin narrow, olivaceous, up to 1 mm. Hyphal system monomitic; generative hyphae with clamp connections, colorless, thin-walled, smooth, interwoven, 1–2.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Leptocystidia subclavate, colorless, thin-walled, smooth, 9–15.5 × 2.5–5 µm. Hyphidia arising from generative hyphae, nodulose, frequently branched, colorless, thin-walled, 1–2 µm in diameter. Basidia ellipsoid to ovoid, longitudinally septate, two- to four-celled, 10–13 × 7–9 µm, involucres well developed, often totally covering basidial cells. Basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores broadly globose to subglobose with a short, often eccentric and asymmetric apiculus, colorless, thin-walled, smooth, usually with one or more oil drops, IKI –, CB –, (4 –) 4.5–5.5 × 4–5 (– 5.5) µm, L = 5.00 µm, W = 4.74 µm, Q = 1.05–1.06 (n = 60 / 2).</p><p>Additional specimen examined (Paratype).</p><p>CHINA • Yunnan Province, Dehong, Longchuan County, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=97.65&amp;materialsCitation.latitude=24.133333" title="Search Plazi for locations around (long 97.65/lat 24.133333)">Tongbiguan Provincial Reserve</a>, 24°08'N, 97°39'E, elevation 2,218 m asl., on dead bamboo, leg. C. L. Zhao, 3 Oct. 2025, CLZhao 49779 (SWFC 00049779) .</p><p>Notes.</p><p>Based on the ITS + nrLSU + TEF 1 topology (Fig. 2), Basidiodendron fragilissimum is positioned as sister to B. yunnanense . However, B. yunnanense can be distinguished from B. fragilissimum by its reticulate to porulose, greyish-blue hymenial surface (Duan and Zhao 2022). Morphologically, B. fragilissimum resembles B. inconspicuum and B. iniquum R. L. M. Alvarenga &amp; K. H. Larss. in having a smooth hymenial surface. However, B. inconspicuum is distinct from B. fragilissimum by its whitish or greyish hymenial surface and minutely warted, wider basidiospores (5–6.2 × 5.2–6.5 µm vs. 4.5–5.5 × 4–5 µm; Spirin et al. 2021). Basidiodendron iniquum can be separated from B. fragilissimum by its waxy basidiomata and pale cream-colored or greyish hymenial surface (Spirin et al. 2020).</p></div>	https://treatment.plazi.org/id/968FC994FDF05BF497CAB4731863C419	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
39F0C70404B954F6B54ED59990DC1DAA.text	39F0C70404B954F6B54ED59990DC1DAA.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron odontoideum Q. Yuan & C. L. Zhao 2026	<div><p>Basidiodendron odontoideum Q. Yuan &amp; C. L. Zhao sp. nov.</p><p>Figs 15, 16, 17</p><p>Diagnosis.</p><p>Basidiodendron odontoideum differs from other species by its soft membranaceous basidiomata, odontioid hymenial surface, short clavate cystidia, and globose to subglobose, smooth basidiospores.</p><p>Etymology.</p><p>Odontoideum (Lat.). Referring to the odontioid hymenophore of the type specimen.</p><p>Type.</p><p>CHINA • Yunnan Province, Zhaotong, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.25&amp;materialsCitation.latitude=27.966667" title="Search Plazi for locations around (long 104.25/lat 27.966667)">Wumeng Mountain National Nature Reserve</a>, 27°58'N, 104°15'E, elevation 2,154 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 28 Aug. 2023, CLZhao 32441 (SWFC 00032441, holotype) .</p><p>Description.</p><p>Basidiomata annual, resupinate, closely adnate, soft membranaceous, without odor or taste when fresh, up to 11 cm long, 8 cm wide, and up to 50 µm thick. Hymenial surface odontioid, slightly cream when fresh, turning to cream upon drying. Sterile margin narrow, white, up to 1 mm. Hyphal system monomitic; generative hyphae with clamp connections, colorless, thin-walled, smooth, interwoven, 1–2 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Leptocystidia short clavate, colorless, thin-walled, smooth, 6.5–8.5 × 2–2.5 µm. Hyphidia absent. Basidia ellipsoid to ovoid, longitudinally septate, two- to four-celled, 6.5–8.5 × 4.5–5 µm, involucres well developed, often totally covering basidial cells. Basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores globose to subglobose, colorless, thin-walled, smooth, usually with one oil drop, IKI –, CB –, 3–3.5 × 2.5–3.5 µm, L = 3.33 µm, W = 3.05 µm, Q = 1.09–1.11 (n = 60 / 2).</p><p>Additional specimen examined (Paratype).</p><p>CHINA • Yunnan Province, Zhaotong, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.3&amp;materialsCitation.latitude=28.033333" title="Search Plazi for locations around (long 104.3/lat 28.033333)">Wumeng Mountain National Nature Reserve</a>, 28°02'N, 104°18'E, elevation 2,260 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 28 Aug. 2023, CLZhao 50721 (SWFC 00050721) .</p><p>Notes.</p><p>Basidiodendron odontoideum forms a single lineage (100 % ML, 1.00 BPP) and resolves in a sister relationship to B. parile in the phylogenetic inference (Fig. 2). Key characters distinguishing B. parile from B. odontoideum are its waxy basidiomata with a smooth hymenial surface and larger basidiospores (4.7–5.9 × 4.1–5.6 µm vs. 3–3.5 × 2.5–3.5 µm; Spirin et al. 2020). Morphologically, B. odontoideum resembles B. alni, B. mexicanum Spirin &amp; Malysheva, and B. microsporum Spirin, Malysheva &amp; Kotiranta in having globose to subglobose basidiospores. However, B. alni can be separated from B. odontoideum by its smooth hymenial surface and larger basidiospores (4.1–5 × 4.2–5 µm vs. 3–3.5 × 2.5–3.5 µm; Spirin et al. 2020). Basidiodendron mexicanum is distinct from B. odontoideum by its pruinose basidiomata, smooth hymenial surface, and larger basidiospores (5.9–7.3 × 6.1–7.4 µm vs. 3–3.5 × 2.5–3.5 µm; Spirin et al. 2021). Basidiodendron microsporum differs from B. odontoideum by its pruinose-reticulate basidiomata and smooth hymenial surface (Spirin et al. 2020).</p></div>	https://treatment.plazi.org/id/39F0C70404B954F6B54ED59990DC1DAA	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
777B947D81665154AC58E24B34301A0A.text	777B947D81665154AC58E24B34301A0A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron Rick	<div><p>Basidiodendron Rick</p><p>Type species.</p><p>Basidiodendron luteogriseum Rick.</p><p>Description.</p><p>Basidiomata annual, resupinate, adnate. Hymenial surface smooth, occasionally tuberculate, pruinose, continuous, becoming crustose, porose, or arachnoid upon drying. Hyphal system monomitic, generative hyphae with clamp connections. Cystidia comprising leptocystidia or gloeocystidia, subcylindrical to clavate, flexuous. Hyphidia present or absent. Basidia urniform, ovoid to ellipsoid, longitudinally septate, four-celled, involucres well-developed or indistinct. Basidiospores allantoid, cylindrical, globose to subglobose, often with a small, eccentric and asymmetric apiculus, walls smooth, warted, or spiny (Wells and Raitviir 1975).</p><p>Notes.</p><p>Basidiodendron was initially introduced by Rick (1938) as a monotypic genus typified by B. luteogriseum Rick. Luck-Allen (1963) reserved the genus for effused wood-inhabiting fungi with gloeocystidia and four-celled, longitudinally septate basidia. Basidiodendron is mainly characterized by an involucre-like arrangement of basidia on sinuous hyphae, with older basidia collapsed and stacked in the lower part (Wells and Raitviir 1975).</p><p>Basidiodendron eyrei (Wakef.) Luck-Allen is a core member of the genus Basidiodendron and has recently been thoroughly studied by Spirin et al. (2020). The species was originally described as Sebacina eyrei Wakef. based on two specimens characterized in the protologue (Wakefield 1914). Both specimens are deposited at the Kew fungarium (K-M 000049485, K-M 000049486) and were examined in the present study. The specimen K-M 000049485 was collected in Whitby, on decorticated wood, in October 1914 by Miss G. A. Cooper, and it appears to be contaminated with microfungi. In comparison, K-M 000049486 is in good condition and contains sufficient material and was selected to serve as the lectotype of S. eyrei .</p><p>Moreover, in the original description of Sebacina eyrei, an affinity to Bourdotia was speculated; therefore, it is suggested that the authority for the combination in the latter genus be cited as Bourdotia eyrei (Wakef.) Wakef. ex Bourdot &amp; Galzin [vs. B. eyrei (Wakef.) Bourdot &amp; Galzin].</p></div>	https://treatment.plazi.org/id/777B947D81665154AC58E24B34301A0A	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
B5EF6FAA479B5A1686716315B8974848.text	B5EF6FAA479B5A1686716315B8974848.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron rigidum Q. Yuan & C. L. Zhao 2026	<div><p>Basidiodendron rigidum Q. Yuan &amp; C. L. Zhao sp. nov.</p><p>Figs 18, 19, 20</p><p>Diagnosis.</p><p>Basidiodendron rigidum differs from other species by its hard coriaceous basidiomata, brown to grayish brown hymenial surface and subcylindrical to subclavate cystidia.</p><p>Etymology.</p><p>Rigidum (Lat.). Referring to the rigid basidiomata of the type specimen.</p><p>Type.</p><p>CHINA • Yunnan Province, Zhaotong, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.333336&amp;materialsCitation.latitude=28.05" title="Search Plazi for locations around (long 104.333336/lat 28.05)">Wumengshan National Nature Reserve</a>, 28°03'N, 104°20'E, elevation 1,500 m asl., on fallen angiosperm branches, leg. C. L. Zhao, 26 Aug. 2023, CLZhao 31785 (SWFC 00031785, holotype) .</p><p>Description.</p><p>Basidiomata annual, resupinate, adnate, soft coriaceous, very hard to separate from substrate, without odor or taste when fresh, becoming hard coriaceous upon drying, up to 6.5 cm long, 0.5 cm wide, and 50 µm thick. Hymenial surface smooth, brown when fresh, turning to brown to grayish brown upon drying. Sterile margin narrow, grayish brown, up to 1 mm. Hyphal system monomitic; generative hyphae with clamp connections, colorless, thin-walled, smooth, interwoven, 2–2.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Leptocystidia subcylindrical to subclavate, thin-walled, occasionally sinuous in the basal position, 21.5–51.5 × 6–6.5 µm. Hyphidia absent. Basidia ellipsoid to ovoid, longitudinally septate, four-celled, 13–19.5 × 10–11 µm, involucres indistinct. Basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores globose, colorless, thin-walled, smooth, usually with oil drops, IKI –, CB –, (6.5 –) 7–8 × 6–7.5 µm, L = 7.49 µm, W = 6.83 µm, Q = 1.09–1.11 (n = 60 / 2).</p><p>Additional specimen examined (Paratype).</p><p>CHINA • Yunnan Province, Zhaotong, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.75&amp;materialsCitation.latitude=28.283333" title="Search Plazi for locations around (long 104.75/lat 28.283333)">Wumengshan National Nature Reserve</a>, 28°17'N, 104°45'E, elevation 2,454 m asl., on fallen angiosperm branches, leg. C. L. Zhao, 19 Sep. 2023, CLZhao 33334 (SWFC 00033334) .</p><p>Notes.</p><p>Based on the ITS + nrLSU + TEF 1 topology (Fig. 2), Basidiodendron rigidum (CLZhao 31785, CLZhao 33334) forms a single lineage (95 % ML, 0.96 BPP) and clusters with B. iniquum, B. pelinum, and B. salebrosum . However, B. iniquum can be delimited from B. rigidum by its waxy basidiomata with a pale cream or greyish hymenial surface and smaller basidiospores (4.9–6.2 × 4.1–5.2 µm vs. 7–8 × 6–7.5 µm; Spirin et al. 2020). Basidiodendron pelinum can be delimited from B. rigidum by its pruinose basidiomata with a tuberculate hymenial surface and smaller basidiospores (4.9–7.1 × 3.9–5.2 µm vs. 7–8 × 6–7.5 µm; Spirin et al. 2020). Basidiodendron salebrosum differs from B. rigidum by its waxy or arid basidiomata with a greyish to pale ochraceous hymenial surface and narrower basidiospores (5.7–7.6 × 4.8–6.1 µm vs. 7–8 × 6–7.5 µm; Spirin et al. 2020). Morphologically, B. rigidum resembles B. robenae Spirin &amp; Miettinen and B. spiculosum in having a smooth hymenial surface. However, B. robenae is distinct from B. rigidum by its pale ochraceous to greyish hymenial surface and shorter basidiospores (5.1–6.4 × 5.2–6.9 µm vs. 7–8 × 6–7.5 µm; Spirin et al. 2021). Basidiodendron spiculosum can be separated from B. rigidum by its pruinose-reticulate basidiomata and spiny basidiospores (Spirin et al. 2021).</p></div>	https://treatment.plazi.org/id/B5EF6FAA479B5A1686716315B8974848	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
FEF072983A1A5AE9BD8F60ABF037592B.text	FEF072983A1A5AE9BD8F60ABF037592B.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron ruiliense Q. Yuan & C. L. Zhao 2026	<div><p>Basidiodendron ruiliense Q. Yuan &amp; C. L. Zhao sp. nov.</p><p>Figs 21, 22, 23</p><p>Diagnosis.</p><p>Basidiodendron ruiliense differs from other species by its farinaceous basidiomata and globose to subglobose basidiospores.</p><p>Etymology.</p><p>Ruiliense (Lat.). Referring to the type locality, Ruili, Yunnan Province, China.</p><p>Type.</p><p>CHINA • Yunnan Province, Dehong, Ruili City, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=97.51667&amp;materialsCitation.latitude=24.183332" title="Search Plazi for locations around (long 97.51667/lat 24.183332)">Tongbiguan Provincial Nature Reserve</a>, 24°11'N, 97°31'E, elevation 1,945 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 21 Nov. 2024, CLZhao 41383 (SWFC 00041383, holotype) .</p><p>Description.</p><p>Basidiomata annual, resupinate, closely adnate, farinaceous, without odor or taste when fresh, up to 12.5 cm long, 1.5 cm wide, and 100 µm thick. Hymenial surface smooth, white to cream when fresh, turning to cream upon drying. Sterile margin narrow, white, up to 1 mm. Hyphal system monomitic; generative hyphae with clamp connections, colorless, thin-walled, smooth, interwoven, 1.5–2.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Leptocystidia subclavate, colorless, thin-walled, smooth, 18.5–27.5 × 4–6.5 µm. Hyphidia absent. Basidia ellipsoid to ovoid, longitudinally septate, two- to four-celled, 9.5–11.5 × 6–7.5 µm, involucres well developed, often totally covering basidial cells. Basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores globose to subglobose, colorless, thin-walled, smooth, usually with one oil drop, IKI –, CB –, (4 –) 4.5–6 × 4–5.5 (– 5.5) µm, L = 5.13 µm, W = 4.98 µm, Q = 1.01–1.03 (n = 60 / 2).</p><p>Additional specimen examined (Paratype).</p><p>CHINA • Yunnan Province, Dehong, Mang City, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=98.083336&amp;materialsCitation.latitude=24.35" title="Search Plazi for locations around (long 98.083336/lat 24.35)">Mengga Town</a>, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=98.083336&amp;materialsCitation.latitude=24.35" title="Search Plazi for locations around (long 98.083336/lat 24.35)">Tongbiguan Provincial Nature Reserve</a>, 24°21'N, 98°05'E, elevation 2,107 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 29 Jul. 2024, CLZhao 36504 (SWFC 00036504) .</p><p>Notes.</p><p>Basidiodendron ruiliense formed a well-supported single lineage (100 % ML, 1.00 BPP) and grouped with B. fragilissimum and B. yunnanense in the phylogenetic inference using ITS + nrLSU + TEF 1 data (Fig. 2). However, B. fragilissimum can be delimited from B. ruiliense by its membranaceous basidiomata with a slightly olivaceous to slightly brown hymenial surface and shorter subclavate cystidia (9–15.5 × 2.5–5 µm vs. 18.5–27.5 × 4–6.5 µm). Basidiodendron yunnanense differs from B. ruiliense by its grayish-blue, reticulate to porulose hymenial surface (Duan and Zhao 2022). Morphologically, B. ruiliense resembles B. alni and B. mexicanum in having a smooth hymenial surface. However, B. alni differs from B. ruiliense by its waxy or partly gelatinized basidiomata. Basidiodendron mexicanum can be separated from B. ruiliense by its grayish to pale ochraceous hymenial surface and spiny, larger basidiospores (5.9–7.3 × 6.1–7.4 µm vs. 4.5–6 × 4–5.5 µm; Spirin et al. 2021).</p></div>	https://treatment.plazi.org/id/FEF072983A1A5AE9BD8F60ABF037592B	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
D2AB2096D0B15C74BE65F636439E1A52.text	D2AB2096D0B15C74BE65F636439E1A52.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron tenissimum Q. Yuan & C. L. Zhao 2026	<div><p>Basidiodendron tenissimum Q. Yuan &amp; C. L. Zhao sp. nov.</p><p>Figs 24, 25, 26</p><p>Diagnosis.</p><p>Basidiodendron tenissimum differs from other species by its buff to cinnamon-buff, smooth hymenial surface, subcylindrical to subclavate with an obtuse apex, occasionally sinuous in the basal position cystidia, and ellipsoid to globose basidiospores.</p><p>Etymology.</p><p>Tenissimum (Lat.). Referring to the type specimens having tenuous basidiocarps.</p><p>Type.</p><p>CHINA • Yunnan Province, Dehong, Yingjiang County, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=97.6&amp;materialsCitation.latitude=25.833334" title="Search Plazi for locations around (long 97.6/lat 25.833334)">Tongbiguan Provincial Nature Reserve</a>, 25°50'N, 97°36'E, elevation 1,000 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 21 Jul. 2023, CLZhao 30794 (SWFC 00030794, holotype) .</p><p>Description.</p><p>Basidiomata annual, resupinate, closely adnate, coriaceous, without odor or taste when fresh, up to 8 cm long, 4 cm wide, and 50–100 µm thick. Hymenial surface smooth, cream to buff when fresh, buff to cinnamon-buff upon drying, cracking. Sterile margin narrow, white to cream, up to 1 mm. Hyphal system monomitic; generative hyphae with clamp connections, colorless, thin-walled, smooth, rarely branched, interwoven, 1.5–2 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Gloeocystidia numerous, thin-walled, subcylindrical to subclavate with an obtuse apex, occasionally sinuous in the basal position, 17–34 × 3.5–6 µm. Hyphidia absent. Basidia narrowly ovoid to ellipsoid, longitudinally septate, four-celled, 8–10 × 5.5–9 µm, involucres absent. Basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores ellipsoid to globose, colourless, thin-walled, smooth, usually with one oil drop, IKI –, CB –, 4–5 (– 5.5) × 4–5 µm, L = 4.79 µm, W = 4.64 µm, Q = 1.02–1.04 (n = 60 / 2).</p><p>Additional specimen examined (Paratype).</p><p>CHINA • Yunnan Province, Dehong, Yingjiang County, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=97.583336&amp;materialsCitation.latitude=24.75" title="Search Plazi for locations around (long 97.583336/lat 24.75)">Tongbiguan Provincial Nature Reserve</a>, 24°45'N, 97°35'E, elevation 1,760 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 21 Jul. 2023, CLZhao 30844 (SWFC 00030844) .</p><p>Notes.</p><p>The combined ITS + nrLSU + TEF 1 phylogenetic analysis revealed that Basidiodendron tenissimum formed a single lineage (100 % ML, 1.00 BPP) and grouped with two taxa, B. dehongense and B. luteogriseum (Fig. 2). However, B. dehongense can be delimited from B. tenissimum by its membranaceous basidiomata with a slightly olivaceous to buff hymenial surface and longer basidiospores (5.5–7.5 × 4.5–6.5 µm vs. 4–5 × 4–5 µm). Basidiodendron luteogriseum differs from B. tenissimum by its pruinose hymenial surface (Spirin et al. 2020). Morphologically, B. tenissimum resembles B. inconspicuum and B. iniquum in having a smooth hymenial surface. However, B. inconspicuum is distinct from B. tenissimum by its pruinose-reticulate hymenial surface and larger basidiospores (5–6.2 × 5.2–6.5 µm vs. 4–5 × 4–5 µm; Spirin et al. 2021). Basidiodendron iniquum can be separated from B. tenissimum by its pale cream-colored or greyish hymenial surface and longer basidiospores (4.9–6.2 × 4.1–5.2 µm vs. 4–5 × 4–5 µm; Spirin et al. 2020).</p></div>	https://treatment.plazi.org/id/D2AB2096D0B15C74BE65F636439E1A52	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
51D679D2E80B5E7A86DBA92DE803EB0D.text	51D679D2E80B5E7A86DBA92DE803EB0D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Basidiodendron zhaotongense Q. Yuan & C. L. Zhao 2026	<div><p>Basidiodendron zhaotongense Q. Yuan &amp; C. L. Zhao sp. nov.</p><p>Figs 27, 28, 29</p><p>Diagnosis.</p><p>Basidiodendron zhaotongense differs from other species by its membranaceous basidiomata, reticulate hymenial surface.</p><p>Etymology.</p><p>Zhaotongense (Lat.). Referring to the type locality, Zhaotong, Yunnan Province, China.</p><p>Type.</p><p>CHINA • Yunnan Province, Zhaotong, Wumeng Mountain National Nature Reserve, 27°77'N, 104°29'E, elevation 2,900 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 29 Aug. 2023, CLZhao 32672 (SWFC 00032672, holotype) .</p><p>Description.</p><p>Basidiomata annual, resupinate, closely adnate, membranaceous, without odor or taste when fresh, up to 5 cm long, 2 cm wide, and 150 µm thick. Hymenial surface reticulate, white to cream when fresh, turning to cream to slightly buff upon drying. Sterile margin narrow, white to cream, up to 1 mm. Hyphal system monomitic; generative hyphae with clamp connections, colorless, thin-walled, smooth, interwoven, 1.5–2.5 µm in diameter, IKI –, CB –; tissues unchanged in KOH. Leptocystidia subclavate, colorless, thin-walled, smooth, 9–14 × 4–4.5 µm. Hyphidia absent. Basidia ellipsoid to ovoid, longitudinally septate, four-celled, 8–10 × 6.5–8.5 µm, involucres absent. Basidioles dominant, similar to basidia in shape, but slightly smaller. Basidiospores ellipsoid to globose, colorless, thin-walled, smooth, usually with one or more oil drops, IKI –, CB –, 4–5 (– 5.5) × (3 –) 3.5–4.5 (– 5.5) µm, L = 4.63 µm, W = 3.89 µm, Q = 1.15–1.22 (n = 90 / 3).</p><p>Additional specimens examined (Paratype).</p><p>CHINA • Yunnan Province, Zhaotong, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.01667&amp;materialsCitation.latitude=28.183332" title="Search Plazi for locations around (long 104.01667/lat 28.183332)">Wumeng Mountain National Nature Reserve</a>, 28°11'N, 104°01'E, elevation 2,200 m asl., on fallen angiosperm branch, leg. C. L. Zhao, 28 Aug. 2023, CLZhao 32305 (SWFC 00032305); 19 Sep. 2023, CLZhao 33274 (SWFC 00033274) .</p><p>Notes.</p><p>In the present study, the phylogram inferred from the ITS + nrLSU + TEF 1 data showed that B. zhaotongense formed a single lineage (100 % ML, 1.00 BPP) and grouped with B. alni and B. eyrei (Fig. 2). However, B. alni can be distinguished from B. zhaotongense by its waxy or partly gelatinized basidiomata with a pruinose hymenial surface and wider basidiospores (4.1–5 × 4.2–5 µm vs. 4–5 × 3.5–4.5 µm; Spirin et al. 2020). Basidiodendron eyrei differs from B. zhaotongense by its pruinose hymenial surface and wider basidiospores (3.8–5.2 × 4.2–5.4 µm vs. 4–5 × 3.5–4.5 µm; Spirin et al. 2020). Morphologically, B. zhaotongense resembles B. spiculosum, B. trachysporum (Bourdot &amp; Galzin) Spirin, M. Weiß &amp; Miettinen, and B. walleynii Spirin, Malysheva &amp; Schoutt. in having ovoid basidia. However, B. spiculosum is distinct from B. zhaotongense by its pruinose-reticulate basidiomata and spiny, larger basidiospores (6.9–8.2 × 7.1–8.9 µm vs. 4–5 × 3.5–4.5 µm; Spirin et al. 2021). Basidiodendron trachysporum differs from B. zhaotongense by its pruinose basidiomata and warted, wider basidiospores (4.8–7.4 × 5–7.8 µm vs. 4–5 × 3.5–4.5 µm; Spirin et al. 2021).</p></div>	https://treatment.plazi.org/id/51D679D2E80B5E7A86DBA92DE803EB0D	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Yuan, Qi;You, Shichun;Wijesinghe, Subodini Nuwanthika;Wang, Lu;Liu, Xiangfu;Ghobad-Nejhad, Masoomeh;Zhao, Changlin	Yuan, Qi, You, Shichun, Wijesinghe, Subodini Nuwanthika, Wang, Lu, Liu, Xiangfu, Ghobad-Nejhad, Masoomeh, Zhao, Changlin (2026): Morphological and phylogenetic analyses in Auriculariales (Basidiomycota, Agaricomycetes) reveal nine new species in Basidiodendron. IMA Fungus 17: e 204252, DOI: 10.3897/imafungus.17.204252
