Tremella erythrina X.Z. Liu & F.Y. Bai

Zhao, Ying, Liu, Xin-zhan & Bai, Feng-yan, 2019, Four new species of Tremella (Tremellales, Basidiomycota) based on morphology and DNA sequence data, MycoKeys 47, pp. 75-95 : 83

Tremella erythrina X.Z. Liu & F.Y. Bai sp. nov. Figures 3, 5

Type.

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).

Etymology.

Erythrina refers to the colour of the basidioma.

Description.

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).

Habitat.

On decaying wood of deciduous tree, in forest dominated by Anacardiaceae , Palmae , Hypericaceae , and Sterculiaceae .

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).

Notes.

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).