Polyporales » Polyporaceae » Murinicarpus

Murinicarpus subadustus

Murinicarpus subadustus (Z.S. Bi & G.Y. Zheng) B.K. Cui & Y.C. Dai 2019, in Cui, et al., Fungal Diversity 97, 137392 (2019)

Diagnosis: Basidiocarps annual, with a distinct lateral to central stipe, solitary, soft corky when fresh, hard corky upon drying. Pilei circular, up to 5 cm in diam and 8 mm thick at base. Pileal surface grayish to grayish brown, glabrous; margin undulating, blunt, more or less reflexed when dry. Pore surface grayish white when fresh, ochraceous when dry; pores round to angular, 34 per mm; dissepiments thin, entire to slightly lacerate. Context cream to ochraceous, soft corky, up to 3 mm thick. Tubes cream to pale straw color, corky when dry, up to 5 mm long. Stipe bearing a grayish to blackish cuticle, glabrous, slender, up to 3 cm long, and 5 mm in diam. Hyphal structure. Hyphal system dimitic; generative hyphae bearing clamp connections; skeletal hyphae dextrinoid, strongly CB+; tissues unchanged in KOH. Generative hyphae infrequent, hyaline, thin-walled, 34.5 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen, rarely branched, interwoven, 4.56.5 µm in diam. Generative hyphae infrequent, hyaline, thin-walled, branched, 2.53.8 µm in diam; skeletal hyphae dominant, hyaline, thick-walled with a wide to narrow lumen, occasionally branched, subparallel along the tubes, 34.3 µm in diam. Cystidia present, hyaline, thick-walled, slightly dextrinoid, CB+, usually covered with crystals, 2540 × 1218 µm; cystidioles occasionally present, fusiform. Basidia barrel-shaped, with four sterigmata and a basal clamp connection, 1520 × 6.58.5 µm; basidioles in shape similar to basidia, but slightly smaller. Spores. — Basidiospores ellipsoid, non-truncate, hyaline, thick-walled, smooth, IKI, CB+, (5.5–)68(–8.5) × (4–)4.55(–5.5) µm, L = 7.05 µm, W = 4.95 µm, Q = 1.421.44 (n = 60/2).

Index Fungorum Number:  IF825662

Notes: Type materials of Wrightoporia subadusta and Perenniporia cystidiata were studied. Both represent the same species. This species has dimitic hyphal structure with strongly dextrinoid and cyanophilous skeletal hyphae, its basidiospores are hyaline, thick-walled, and distinctly cyanophilous, but negative in Melzers reagent. These characters match the concept of Perenniporia. However, this species has stipe and cystidia, which are different from other species of Perenniporia. Moreover, Murinicarpus subadustus is distant from the Perenniporia sensu stricto clade in the phylogenetic analysis. Therefore, the new genus is set up and the new combination is proposed. Perenniporia stipitata Ryvarden and M. subadusta share similar character by having lateral stipe basidiocarps, but P. stipitata has smaller pores (810 per mm) and smaller basidiospores (56 9 34 µm, Dai et al. 2002).


Figure 1. A basidiocarp of Murinicarpus subadustus



Figure 2. Microscopic structures of Murinicarpus subadustus (drawn from Cui 8459). a. Basidiospores; b. Basidia and basidioles;c. Cystidioles; d. Cystidia; e. Hyphae from trama. Bars: a = 5 µm; be = 10 µm



Cui, B.K., & Zhao, C.L., & Dai, Y.C. (2011). Melanoderma microcarpum gen. et sp. nov. (Basidiomycota) from China. Mycotaxon 116, 295302

Cui, B.K., & Li, H.J., & Ji, X., & Zhou, J.L., & Song, J. & Si, J., & Yang, Z.L., & Dai, Y.C. (2019). Species diversity, taxonomy and phylogeny of Polyporaceae (Basidiomycota) in China. Fungal Diversity 97, 137392

Dai, Y.C., & Niemela, T., &, Kinnunen, J. (2002). The polypore genera Abundisporus and Perenniporia (Basidiomycota) in China, with notes on Haploporus. Annales Botanici Fennici 39, 169182


About Basidiomycota

The webpage Basidiomycota provides an up-to-date classification and account of all genera of the phylum Basidiomycota.


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