Abstract
Two new species of Lactarius from Dinghu Mountain, Guangdong Province in southern China were described based on both morphological characters and phylogenetic analysis of internal transcribed spacer (ITS) sequences. Lactarius verrucosporus sp. nov. is characterized by reddish brown pileus with white and decurved margin, pale cream lamellae, globose to subglobose basidiospores with isolated warts, thin pileipellis composed of globose subterminal cells and inflated terminal elements. Lactarius nigricans sp. nov. is recognized by greyish brown pileus, beige lamellae, amyloid basidiospores with high ridges, subcylindrical to subfusiform caulocystidia, thick pileipellis with long terminal cells. Both molecular and morphological analysis consistently confirm that L. verrucosporus and L. nigricans belong to Lactarius subgenera Russularia and Plinthogalus, respectively, and both species are distinct from all described species of these two subgenera. The morphological differences of these two novel species with their closely related taxa are discussed.
References
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https://doi.org/10.1007/s11557-016-1198-4
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https://doi.org/10.7872/crym/v38.iss1.2017.101
Buyck, B., Hofstetter, V., Eberhardt, U., Verbeken, A. & Kauff, F. (2008) Walking the thin line between Russula and Lactarius: the dilemma of Russula subsect. Ochricompactae. Fungal Diversity 28: 15–40.
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Das, K. & Chakraborty, D. (2015) Lactarius vesterholtii, a new species from India. Mycotaxon 129 (2): 477–484.
https://doi.org/10.5248/129.477
Das, K. & Verbeken, A. (2012) New Species of Lactarius Subg. Plinthogalus and New Records of Lactifluus Subg. Gerardii (Russulaceae) from Sikkim, India. Taiwania 57 (1): 37–48.
Das, K., Ghosh, A., Li, J.W., Qiu, L.H., Baghela, A., Halama, M., Hembrom, M.E., Mehmood, T., Parihar, A., Pencakowski, B., Bielecka, M., Reczynska, K., Sasiela, D., Singh, U., Song, Y., ?wierkosz, K., Szczesniak, K., Uniyal, P., Zhang, J.B. & Buyck, B. (2017) Fungal Biodiversity Profiles 31–40. Cryptogamie Mycologie 38 (3): 1–54.
https://doi.org/10.7872/crym/v38.iss3.2017.353
Das, K., Sharma, J.R., Basso, M.T. & Bhatt, R.P. (2005) Lactarius in Kumaon Himalaya 4: A new species of subgenus Piperites. Mycotaxon 91: 1–7.
Das, K., Verbeken, A. & Nuytinck, J. (2015) Morphology and phylogeny of four new Lactarius species from Himalayan India. Mycotaxon 130 (1): 105–130.
https://doi.org/10.5248/130.105
Das, K., Verbeken, A., Chakraborty, D., Avchar, R. & Baghela, A. (2018) Morphological and Phylogenetic Evidence for Two New Lactarius Species (Russulales, Basidiomycota) from India. Cryptogamie, Mycologie.
Drummond, A.J. & Rambaut, A. (2007) Beast: Bayesian evolutionary analysis by sampling trees. BMC Evolutionary Biology 7: 214.
https://doi.org/10.1186/1471-2148-7-214
Eberhardt, U. (2000) Moleculare Analysen zur Verwandtschaft der agaricoiden Russulaceen im Vergleich mit Mykorrhiza-und Fruchtkörpermerkmalen. PhD dissertation, University of Tübingen, Germany.
Heilmann-Clausen, J. (1998) The genus Lactarius. Fungi of northern Europe.
Kanad, D. & Annemieke, V. (2011) Three new species of Lactarius (Russulaceae) from Sikkim, India. Cryptogamie, Mycologie 32 (4): 365–381.
https://doi.org/10.7872/crym.v32.iss4.2011.365
Kuo, M., Methven, A.S., Minnis, A.M. & Halling, R.E. (2013) Studies of North American macrofungi, 1. Validation of Lactarius rubidus comb. nov. and Leccinellum quercophilum sp. nov. Mycotaxon 124 (1): 323–332.
https://doi.org/10.5248/124.323
Latha, K.D., Raj, K.A., Farook, V.A., Sharafudheen, S.A., Parambil, N.K. & Manimohan, P. (2016) Three new species of Russulaceae from India based on morphology and molecular phylogeny. Phytotaxa 246 (1): 61–77.
https://doi.org/10.11646/phytotaxa.246.1.5
Le, H.T., Nuytinck, J., Verbeken, A., Lumyong, S. & Desjardin, D.E. (2007) Lactarius in Northern Thailand: 1. Lactarius subgenus Piperites. Fungal Diversity 24, 173–224.
Le, H.T., Stubbe, D., Verbeken, A., Nuytinck, J., Lumyong, S. & Desjardin, D.E. (2007) Lactarius in Northern Thailand: 2. Lactarius subgenus Plinthogali. Fungal Diversity 27 (1): 61–94.
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