Termitomyces clypeatus

Termitomyces clypeatus R. Heim

Index fungorum number: 306766

Pileus 6-10 cm diam., at first pointed conical then broadly convex to plane, with a dark prominent spiniform perforatorium; surface greyish brown to ochraceous brown, dark at the center and paler towards the margin when mature, fibrillose and silky, margin at first incurved then straight, often splitting. Lamellae free, white to cream, 0.8-1.0 cm wide, crowded with lamellulae. Stipe 6.5-12 cm long, 1-2 cm wide, central, cylindrical to subcylindrical, occasionally forming slightly thickening at stipe base, surface white with longitudinal fibrillose, solid. Annulus absent. Pseudorhiza 3-10 cm long, 0.3-1.0 cm thick, tapering towards the base, surface white to cream, smooth, solid. Spore deposit not found. Basidiospores 5-8 x 3-6 μm, ovoid to ellipsoid; smooth and thin-walled, inamyloid. Basidia 12-20 x 5-8 μm, clavate to subcylindric, bearing four sterigmata, inamyloid. Hymenophoral trama regular, up to 100 μm wide, inamyloid. Cheilocystidia crowded, 17-18 x 9-10 μm, clavate to pyriform, smooth and thin-walled, inamyloid. Pleurocystidia crowded, 23-42 x 9-30 μm, similar to cheilocystidia Pileipellis a repent epicutis of narrow, radial hyphae, 2.0-4.0 μm diam.

Specimen examined: Sukhothai: Mueang, Ban Kluai (TERM062).

Fig 1. Phylogenetic tree based on ITS1-5.8S-ITS2 of Termitomyces sequences in this study and from GenBank (blue letter) using the Maximum parsimony method. Agaricus abruptibulbus is used as an outgroup. Numbers at the node are bootstrap scores of 1000 replicates.