Boletales » Boletaceae

Parvixerocomus

Parvixerocomus G. Wu & Zhu L. Yang, in Wu et al., Fungal Diversity 81(1): 124 (2015)

 

Etymology:Parvixerocomusrefers to the Xerocomus like small basidioma.

 

Diagnosis: This genus differs from all other genera of Boletaceae by its small basidiomata (usually <4 cm in diam.) with yellow hymenophoral tubes and pores which stain blue when bruised, ovoid to ellipsoid smooth spores, and an epithelioid pileipellis.

 

Basidioma stipitate-pileatewith tubular hymenophore, small. Pileus convex to applanate, subtomentose, dry; context yellowish to yellow, staining blue immediately when injured. Hymenophore subdecurrent, often with teeth on the apex of stipe; Hymenophoral surface yellowish to yellow, staining blue immediately when injured; pores irregular, angular to nearly round, often compound; tubes concolorous with hymenophoral surface, staining blue immediately when injured. Stipe central, light brown, brownish red to reddish brown, surface often pruinose; Basal mycelia cream to grayish yellowish. Pileipellis an epithelium composed of submoniliform to moniliform hyphae with cystidioid terminal cells. Pleuro- and cheilocystidia subfusiform-ventricose or clavate, with subacute apex or with long beak. Basidiospores smooth, ovoid to ellipsoid, yellowish to brownish yellow. Clamp connections absent.

 

Index Fungorum number: IF811420

 

Type species: Parvixerocomus pseudoaokii G. Wu, K. Zhao & Zhu L. Yang 2015, in Wu et al., Fungal Diversity 81(1): 124 (2015)

 

Species

Parvixerocomus aokii (Hongo) G. Wu, N.K. Zeng & Zhu L. Yang 2015

Parvixerocomus pseudoaokii G. Wu, K. Zhao & Zhu L. Yang 2015

 

Key References

Wu G, Zhao K, Li Y-C, Zeng N-K, Feng B, Halling RE, Yang Z-L (2016) Four new genera of the fungal family Boletaceae. Fungal Divers, 81(1):124

 

About Basidiomycota

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

 

Supported by 

Thailand Science Research and Innovation (TSRI)

project entitled:

"Macrofungi diversity research from the Lancang-Mekong Watershed and surrounding areas"

(Grant No. DBG6280009)

Contact

  • Email: basidio.org@yahoo.com
  • Addresses:
    Mushroom Research Foundation, 292 Moo 18, Bandu District,
    Muang Chiangrai 57100, Thailand
  • The State Key Lab of Mycology, Institute of Microbiology, Chinese Academy of Sciences, No.3 1st Beichen West Rd., Chaoyang District, Beijing 100101, P.R. China


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