Amylosporia hattorii (Y.C. Dai & B.K. Cui) B.K. Cui, C.L. Zhao & Y.C. Dai, in Cui, et al., Fungal Diversity 97: 164 (2019)
Diagnosis: Basidiocarps annual, resupinate to effused-reflexed, adnate, soft corky to corky, without odor or taste when fresh, becoming corky to fragile upon drying, up to 15 cm long, 4 cm wide and 1.2 mm thick at center. Pore surface cream to buff when fresh becoming cinnamon-buff when bruised, pale yellowish brown upon drying; pores round to angular, 3–5 per mm; dissepiments thin, entire. Sterile margin cream to cream buff, up to 1 mm wide. Subiculum thin, cream to buff, corky, azonate, up to 0.2 mm thick. Tubes concolorous with the pore surface, corky to fragile, up to 1 mm long.
Hyphal system dimitic; generative hyphae bearing clamp connections; skeletal hyphae weakly IKI+, CB+; tissues unchanged in KOH.
Generative hyphae infrequent, hyaline, thin-walled, rarely branched, 1.5–3.4 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a narrow lumen to subsolid, occasionally branched, interwoven, 2.5–4.8 µlm in diam.
Generative hyphae infrequent, hyaline, thin walled, rarely branched, 1.4–3.2 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a narrow lumen to subsolid, occasionally branched, interwoven, 2.2–4.5 µm in diam. Cystidia absent; fusoid cystidioles present, 18–25 9 6–9 µm. Basidia barrel-shaped, with four sterigmata and a basal clamp connection, 20–32 9 10–15 µm; basidioles pear-shaped, distinctly smaller than basidia.
Basidiospores ellipsoid, truncate, hyaline, thick-walled, smooth, weakly IKI+, CB+, (9–)10–12 (–14) 9 (4.5–)5.5–7.5(–8) µm, L = 11 µm, W = 6.5 µm, Q = 1.65–1.76 (n = 90/3).
Index Fungorum Number: IF825658
Notes: Amylosporia hattorii was firstly described in Perenniporia Murrill from tropical China (Dai et al. 2011a, b). It is characterized by an annual growth habit, amyloid and cyanophilous skeletal hyphae, and ellipsoid, truncate and amyloid basidiospores. In the current study, it is transferred to the new genus Amylosporia. Amylosporia differs from Perenniporia by its both amyloid skeletal hyphae and amyloid basidiospores.
Figure 1. Basidiocarps of Amylosporia hattorii
Figure 2. Microscopic structures of Amylosporia hattorii (drawn from Dai 10285). a. Basidiospores; b. Basidia and basidioles; c. Cystidioles; d. Hyphae from trama. Bars: a–d = 10 µm
Cui, Bao-Kai & Li, Hai-Jiao & Ji, Xing & Zhou, Jun-Liang & Song, Jie & Si, Jing & Yang, Zhu-Liang & Dai, Yu-Cheng. (2019). Species diversity, taxonomy and phylogeny of Polyporaceae (Basidiomycota) in China. Fungal Diversity 97, 137–392.
Dai, Y.C., Cui, B.K., Yuan, H.S., He, S.H., Wei, Y.L., Qin, W.M., Zhou, L.W. and Li, H.J. (2011a). Wood-inhabiting fungi in southern China. 4 Polypores from Hainan Province. In Annales Botanici Fennici ,48, 219-231.
Dai, Y. C., Zhou, L. W., & Steffen, K. (2011b). Wood-decaying fungi in eastern Himalayas 1. Polypores from Zixishan Nature Reserve, Yunnan province, China. Mycosystem, 30(5), 674-679.