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Issue: Vol. 759 No. 2: 28 May 2026
Type: Article
Published: 2026-05-28
DOI: 10.11646/phytotaxa.759.2.7
Page range: 185-194
Abstract views: 0
PDF downloaded: 0

Rhizocybe pleurotoides (Lyophyllaceae, Agaricales), a new species from South China

College of Plant Science; Xizang Agricultural and Animal Husbandry University; Linzhi 860000; China; State Key Laboratory of Applied Microbiology Southern China; Guangdong Provincial Key Laboratory of Microbial Culture; Collection and Application; Institute of Microbiology; Guangdong Academy of Sciences; Guangzhou 510070; China
College of Plant Science; Xizang Agricultural and Animal Husbandry University; Linzhi 860000; China; State Key Laboratory of Applied Microbiology Southern China; Guangdong Provincial Key Laboratory of Microbial Culture; Collection and Application; Institute of Microbiology; Guangdong Academy of Sciences; Guangzhou 510070; China
State Key Laboratory of Applied Microbiology Southern China; Guangdong Provincial Key Laboratory of Microbial Culture; Collection and Application; Institute of Microbiology; Guangdong Academy of Sciences; Guangzhou 510070; China
State Key Laboratory of Applied Microbiology Southern China; Guangdong Provincial Key Laboratory of Microbial Culture; Collection and Application; Institute of Microbiology; Guangdong Academy of Sciences; Guangzhou 510070; China
College of Plant Science; Xizang Agricultural and Animal Husbandry University; Linzhi 860000; China
College of Biology and Food Engineering; Guangdong University of Education; Guangzhou 510303; China
Fungi New taxon phylogeny taxonomy tricholomatoid clade

Abstract

A new species, Rhizocybe pleurotoides, is described from Guangdong Province, China, based on morphological, and molecular phylogenetic evidence. It is characterized by the small pleurotoid basidiomata, yellowish white pileus, short stipe (≤1 mm long) with well-developed rhizomorphs at the base, and elliptical basidiospores (average 4.28 × 3.05 μm). Phylogenetic analyses based on the combined nrITS-nrLSU-rpb2 sequence dataset strongly support its recognition as a distinct clade within the genus Rhizocybe. Detailed morphological descriptions, photographs of basidiomata, microscopic structures, and comparisons with related taxa are provided.

References

  1. Acharya, K., Tarafder, E., Dutta, A.K., Nandi, S., Pradhan, P., Sarkar, J., Paloi, S., Sikder, R. & Roy, A. (2017a) Contribution to the Macromycetes of West Bengal, India: 8–12. Research Journal of Pharmacy and Technology 10 (3): 823. https://doi.org/10.5958/0974-360X.2017.00155.X
  2. Acharya, K., Tarafder, E., Pradhan, P., Dutta, A.K., Paloi, S., Datta, M. & Roy, A. (2017b) Contribution to the Macromycetes of West Bengal, India: 18–22. Research Journal of Pharmacy and Technology 10 (9): 3061. https://doi.org/10.5958/0974-360X.2017.00543.1
  3. Alvarado, P., Moreno, G., Vizzini, A., Consiglio, G., Manjón, J.L. & Setti, L. (2015) Atractosporocybe, Leucocybe and Rhizocybe: three new clitocyboid genera in the tricholomatoid clade (Agaricales) with notes on Clitocybe and Lepista. Mycologia 107 (1): 123–136. https://doi.org/10.3852/13-369
  4. Bigelow, H.E. & Hesler, L.R. (1960) Clitocybe in Tennessee and North Carolina. Journal of the Elisha Mitchell Scientific Society 76 (1): 155–167. [https://www.jstor.org/stable/24334440]
  5. Chakraborty, N., Tarafder, E., Paul, A., Paloi, S. & Acharya, K. (2022) Trichoglossum benghalense (Geoglossales, Ascomycota) from India: new to science. Phytotaxa 536 (1): 72–82. https://doi.org/10.11646/phytotaxa.536.1.4
  6. Ding, Y.X., Tian, E.J. & Alvarado, P. (2017) A new species of Rhizocybe (tricholomatoid clade, Agaricales) from Yunnan, China. Phytotaxa 328 (2): 267–275. https://doi.org/10.11646/phytotaxa.328.2.5
  7. Dutta, A.K., Nandi, S., Tarafder, E., Sikder, R., Roy, A. & Acharya, K. (2017) Trogia benghalensis (Marasmiaceae, Basidiomycota), a new species from India. Phytotaxa 331 (2): 273–278. https://doi.org/10.11646/phytotaxa.331.2.11
  8. Dutta, A.K., Bera, S., Paloi, S., Rakshit, S., Tarafder, E., Sherpa, A.R. & Acharya, K. (2020) Lepiotaceous fungi of West Bengal, India: the genus Chlorophyllum. Phytotaxa 451 (2): 113–131. https://doi.org/10.11646/phytotaxa.451.2.2
  9. Harmaja, H. (1969) The genus Clitocybe (Agaricales) in Fennoscandia. Karstenia 10: 5–168. https://doi.org/10.29203/ka.1969.62
  10. He, Z.M., Chen, Z.H., Bau, T., Wang, G.S. & Yang, Z.L. (2023) Systematic arrangement within the family Clitocybaceae (Tricholomatineae, Agaricales): phylogenetic and phylogenomic evidence, morphological data and muscarine-producing innovation. Fungal Diversity 123: 1–47. https://doi.org/10.1007/s13225-023-00527-2
  11. Horak, E. (1971) A contribution towards the revision of the Agaricales (Fungi) from New Zealand. New Zealand Journal of Botany 9 (3): 403–462. https://doi.org/10.1038/s41598-025-08102-2
  12. Kalyaanamoorthy, S., Minh, B.Q., Wong, T.K.F., von-Haeseler, A. & Jermiin, L.S. (2017) ModelFinder: fast model selection for accurate phylogenetic estimates. Nature Methods 14 (6): 587–589. https://doi.org/10.1038/nmeth.4285
  13. Kornerup, A. & Wanscher, J.H. (1978) Methuen Handbook of Colour. Eyre Methuen, London, 252 pp.
  14. Liu, Y.J., Whelen, S. & Hall, B.D. (1999) Phylogenetic relationships among ascomycetes: evidence from an RNA polymerase II subunit. Molecular Biology and Evolution 16 (12): 1799–1808. https://doi.org/10.1093/oxfordjournals.molbev.a026092
  15. Minh, B.Q., Nguyen, M.A.T. & von-Haeseler, A. (2013) Ultrafast approximation for phylogenetic bootstrap. Molecular Biology and Evolution 30 (5): 1188–1195. https://doi.org/10.1093/molbev/mst024
  16. Nguyen, L.T., Schmidt, H.A., von-Haeseler, A. & Minh, B.Q. (2015) IQ-TREE: a fast and effective stochastic algorithm for estimating maximum-likelihood phylogenies. Molecular Biology and Evolution 32 (1): 268–274. https://doi.org/10.1093/molbev/msu300
  17. Rambaut, A. (2018) FigTree. Available from: http://tree.bio.ed.ac.uk/software/figtree/ (accessed 26 January 2026)
  18. Ronquist, F., Teslenko, M., van-der Mark, P., Ayres, D.L., Darling, A., Höhna, S., Larget, B., Liu, L., Suchard, M.A. & Huelsenbeck, J.P. (2012) MrBayes 3.2: efficient Bayesian phylogenetic inference and model choice across a large model space. Systematic Biology 61 (3): 539–542. https://doi.org/10.1093/sysbio/sys029
  19. Stevenson, G. (1964) The Agaricales of New Zealand: V. Kew Bulletin 19 (1): 1–59. https://doi.org/10.2307/4108283
  20. Tarafder, E., Dutta, A.K., Sarkar, J. & Acharya, K. (2018) A new species of Agaricus sect. Brunneopicti from Eastern India. Phytotaxa 374 (2). https://doi.org/10.11646/phytotaxa.374.2.5
  21. Tarafder, E., Dutta, A.K., Karunarathna, S.C., He, M.Q., Tian, F. & Acharya, K. (2023) Agaricus sect. Xanthodermatei (Agaricales) of West Bengal, India. Phytotaxa 630 (4): 245–265. https://doi.org/10.11646/phytotaxa.630.4.1
  22. Tarafder, E., Karunarathna, S.C., Das, D., Elgorban, A.M., Wen, T.C. & Acharya, K. (2025a) New species of Rhodocybe (Entolomataceae, Agaricales) from India. New Zealand Journal of Botany 63 (5): 2120–2137. https://doi.org/10.1080/0028825x.2025.2477703
  23. Tarafder, E., Karunarathna, S.C., Dutta, A.K., Elgorban, A.M., Tian, F.H. & Acharya, K. (2025b) Morphology and phylogeny reveal two new species and a new geographical record of Agaricus sect. Rubricosi (Agaricales) from West Bengal, India. Scientific Reports 15 (1): 25190. https://doi.org/10.1038/s41598-025-08102-2
  24. Tarafder, E., Hoque, E., Sherpa, A.R., Karunarathna, S.C., Wang, M., Wijayawardene, N.N., Li, Q., Yu, F., Dai, D.Q. & Watsuntorn, W. (2026) Taxonomy and phylogeny reveal new species of Volvariella (Volvariellaceae, Agaricales) and Volvopluteus (Pluteaceae, Agaricales) from eastern India. MycoKeys 130: 185–208. https://doi.org/10.3897/mycokeys.130.183859
  25. Vilgalys, R. & Hester, M. (1990) Rapid genetic identification and mapping of enzymatically amplified ribosomal DNA from several Cryptococcus species. Journal of Bacteriology 172 (8): 4238–4246. https://doi.org/10.1128/jb.172.8.4238-4246.1990
  26. Wang, C.Q., Zhang, M., He, X.L., Liu, J.W., Wei, T.Z., Liu, T.Z., Wang, K., Adamčík, S., Li, T.H. & Deng, W.Q. (2023) Species diversity of Hygrophorus in China and a phylogenetic study of the genus. Mycosphere 14 (1): 1742–1834. https://doi.org/10.5943/mycosphere/14/1/21
  27. Wang, F., Wang, K., Cai, L., Zhao, M.J., Kirk, P.M., Fan, G.M., Sun, Q.L., Li, B., Wang, S., Yu, Z.F., Han, D., Ma, J.C., Wu, L.H. & Yao, Y.J. (2023) Fungal names: a comprehensive nomenclatural repository and knowledge base for fungal taxonomy. Nucleic Acids Research 51 (D1): D708–D716. https://doi.org/10.1093/nar/gkac926
  28. White, T.J., Bruns, T., Lee, S. & Taylor, J. (1990) Amplification and direct sequencing of fungal ribosomal RNA genes for phylogenetics. In: Innis, M.A., Gelfand, D.H., Sninsky, J.J. & White, J.W. (Eds.) PCR protocols: a guide to methods and applications. Academic Press, New York, pp. 315–322. https://doi.org/10.1016/B978-0-12-372180-8.50042-1
  29. Xiang, C.Y., Gao, F.L., Jakovlić, I., Lei, H.P., Hu, Y., Zhang, H., Zou, H., Wang, G.T. & Zhang, D. (2023) Using PhyloSuite for molecular phylogeny and tree-based analyses. iMeta 2 (1): 1–42. https://doi.org/10.1002/imt2.87
  30. Zhang, A.Q., Jin, R., Zhang, X., Tarafder, E. & Xu, J.Z. (2025) Two new species of genus Leucoagaricus and Leucocoprinus (Agaricaceae, Agaricales) from China. MycoKeys 125: 33–49. https://doi.org/10.3897/mycokeys.125.160410
  31. Zhang, D., Gao, F.L., Jakovlić, I., Zou, H., Zhang, J., Li, W.X. & Wang, G.T. (2020) PhyloSuite: An integrated and scalable desktop platform for streamlined molecular sequence data management and evolutionary phylogenetics studies. Molecular Ecology Resources 20 (1): 348–355. https://doi.org/10.1111/1755-0998.13096
  32. Zhang, M., Xie, D.C., Wang, C.Q., Deng, W.Q. & Li, T.H. (2022) New insights into the genus Gyroporus (Gyroporaceae, Boletales), with establishment of four new sections and description of five new species from China. Mycology 13 (3): 223–242. https://doi.org/10.1080/21501203.2022.2094012
  33. Zhang, M., Wang, C.Q., Bai, H.F. & Deng, W.Q. (2024) A Contribution to the Phylogeny and Taxonomy of Hydnum (Cantharellales, Basidiomycota) from China. Journal of Fungi 10 (2): 98. https://doi.org/10.3390/jof10020098
  34. Zhang, M., Huang, Y.X., Xian, W.X., Li, T.H., Zhou, P., Wang, C.Q. & Deng, W.Q. (2025) Species diversity, taxonomy, distribution and multi-gene phylogeny of chanterelles in China. Mycosphere 16 (1): 3753–3950. https://doi.org/10.5943/mycosphere/16/1/30
  35. Zhang, W.X., Deng, W.Q., Wang, C.Q., Zhou, P., Lin, M. & Zhang, M. (2025) Three new species of Gerronema (Agaricales, Basidiomycota) from southern China. MycoKeys 114: 239–258. https://doi.org/10.3897/mycokeys.114.145299

How to Cite

Yang, X., Duan, X., Zhang, M., Deng, W., Yue, H. & Wang, C. (2026) Rhizocybe pleurotoides (Lyophyllaceae, Agaricales), a new species from South China. Phytotaxa 759 (2): 185–194. https://doi.org/10.11646/phytotaxa.759.2.7