Tremella erythrina X.Z. Liu & F.Y. Bai
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|Tremella erythrina X.Z. Liu & F.Y. Bai|
Tremella erythrina X.Z. Liu & F.Y. Bai sp. nov. Figures 3, 5
CHINA. Guangxi Province, Chongzuo city, Longzhou county, Qiang village, Nonggang National Nature Reserve, 106°54'E, 22°27'N, R.L. Zhao, M.Q. He, G.F. Mou, J.L. Qin, H.J. Wang & X.Y. Zhu, 30 July 2017, GX20170141 (HMAS 255317).
Erythrina refers to the colour of the basidioma.
Basidiomata sessile, cerebriform to foliose, with undulate broad lobes, lobes hollow, firm gelatinous, up to 1.3-1.8 cm in diameter, broadly attached to substrate, red and brownish orange when fresh and brownish orange when dry. Hyphae smooth, thin- or thick-walled, slender, hyaline, 1.0-3.0 μm, with clamp connections, branched with frequent anastomoses. Haustoria rare, small, subglobose, 1.5-2.0 μm in diameter, with single hyphae. Hyphidia present, smooth, thin-walled, 2.0-4.0 μm, branched. Probasidia mostly broadly ellipsoid. Mature basidia, globose to subglobose or broadly ellipsoid to ovoid, 12.0-18.0 μm × 13.0-19.0 μm, mostly four-celled, occasionally two-celled, without stalks, frenquently longitudianllly cruciate-septate. Basidiospores, smooth, thin-walled, ellipsoid to ovoid, apiculate, 7.0-10.0 μm × 5.0-7.0 μm, L = 8.2 ± 0.8 μm, W = 6.1 ± 0.6 μm, Q = 1.1-1.7 (n = 40).
Additional specimens examined.
CHINA. Guangxi Province, Chongzuo city, Longzhou county, Nonggang village, Nonggang National Nature Reserve, 106°56'E, 22°28'N, H.S. Ma, 16 September 2017, GX20170916001 (HMAS 279591).
Two specimens representing T. erythrina clustered in a well-supported clade and were closely related to T. samoensis . These two species showed 97.6%-97.8% and 93.7%-96.0% sequence identities in the D1/D2 domain and ITS region, respectively. Basidia in T. erythrina are larger than those of T. samoensis (12.0-18.0 μm × 13.0-19.0 μm in T. erythrina vs 12.0-18.0 μm × 8.0-12.0 μm in T. samoensis ) ( Chen 1998; Malysheva et al. 2015). Moreover, hyphidia are present and located in the hymenial structure and derived from the same generative hyphae with basidia in T. erythrina , whereas hyphidia are lacking in T. samoensis ( Chen 1998; Malysheva et al. 2015).
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