Polyporales » Polyporaceae » Cryptoporus

Cryptoporus volvatus

Cryptoporus volvatus (Peck) Shear 1902, in Cui, et al., Fungal Diversity 97, 137392 (2019)

Diagnosis: Basidiocarps annual, pileate, solitary, without odor or taste when fresh, hard corky upon drying. Pilei oblate spheroidal, projecting up to 4.5 cm, 3.5 cm wide and 2.5 cm thick at base. Pileal surface cream to deep. Hyphal system trimitic; generative hyphae bearing clamp connections; skeletal and binding hyphae IKI, CB+; tissues darkening in KOH. Generative hyphae infrequent, hyaline, thin-walled, occasionally branched, 23 µm in diam; skeletal hyphae dominant, hyaline, thick-walled to subsolid, branched, interwoven, 34.2 µm in diam; binding hyphae abundant, thick-walled, frequently branched, strongly interwoven, 1.22.5 µm in diam. Basidiospores cylindrical to oblong-ellipsoid, hyaline, thick-walled, smooth, IKI, CB+, (8.5–)9.211.5(–11.8) 9 (3.5–)4.15(–5.5) µm, L = 10.44 µm, W = 4.74 µm, Q = 2.172.26 (n=60/2).

Index Fungorum Number: IF185937

Notes: Cryptoporus volvatus has a widespread distribution in North America and East Asia whereas C. sinensis is so far known only from southern China. Further studies based on more specimens and multi-loci are needed to clarify whether the basidiospores size range of C. sinensis indicate a distinct species or belong to the natural size of C. volvatus.