Agaricales » Cystostereaceae » Rigidotubus

Rigidotubus tephroleucus

Rigidotubus tephroleucus J. Song, Y.C. Dai & B.K. Cui, in Song et al., Phytotaxa 333(2): 263 (2018)

 

Etymology: Tephroleucus (Lat.): referring to the grayish white pore surface.

Diagnosis: Rigidotubus tephroleucus is characterized by resupinate, tough basidiomata, grayish white pore surface, white sterile margin, a monomitic hyphal system with clamped generative hyphae, ovoid to ellipsoid and thin-walled basidiospores, 3.54.5 × 2.33 μm.

Basidiomata annual, resupinate, adnate, tough, without odor or taste when fresh, up to 20 cm long, 5 cm wide and 3 mm thick at centre. Pore surface grayish white when dry; pores round to angular, 24 per mm; dissepiments thin, entire to slightly lacerate; margin sterile, irregular, white, up to 3 mm wide. Subiculum white to buff when dry, membranous, up to 0.5 mm thick. Tubes concolorous with pore surface, tough, up to 2.5 mm long. Hyphal system monomitic; generative hyphae with clamp connections, all hyphae IKI, CB; tissues unchanged in KOH. Subiculum Generative hyphae hyaline, thin-walled, frequently branched, interwoven, 12 μm in diam. Tubes Generative hyphae hyaline, thin-walled, frequently branched, 0.52 μm in diam. Cystidia and cystidioles absent. Basidia clavate, with four sterigmata and a basal clamp connection, 812 × 35 μm in diam; basidioles dominant, similar in shape to basidia but smaller. Basidiospores ovoid to ellipsoid, thin-walled, hyaline, smooth, IKI, CB, 3.54.5 × 2.33 μm, L = 3.96 μm, W = 2.6 μm, Q = 1.491.52 (n=60/2). Rot type A white rot.

Index fungorum number: IF823703

 

 

Figure 1. Maximum parsimony (MP) tree of Rigidotubus and related genera based on ITS+28S sequence data. Branches are labeled with bootstrap value (MP/ML) higher than 50%, and posterior probabilities (BI) more than 0.95 respectively. Bold names = New species.

 

Figure 2. Basidiomata of Rigidotubus tephroleucus. Scale bar = 1.5 cm.

 

Figure 3. Microscopic structures of Rigidotubus tephroleucus (draw from the holotype). a Basidiospores. b Basidia. c Basidioles. d Hyphae from trama. e Hyphae from subiculum. Scale bars: ae = 10 μm.

Reference:

Song J., Xing J.-H., Ji X., Sun Y.-F., Cui B.-K., & Dai Y.C.. 2018. Rigidotubus tephroleucus gen. et sp. nov. (Cystostereaceae, Agaricales) evidenced by morphological characters and phylogenetic analyses. Phytotaxa, 333(2), 259. doi:10.11646/phytotaxa.333.2.10

 

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


Published by the State Key Lab of Mycology, Institute of Microbiology, Chinese Academy of Sciences and
Mushroom Research Foundation
Copyright © The copyright belongs to the Curators. All Rights Reserved.