Hydnophlebia omnivora (Shear) Hjortstam & Ryvarden, Synopsis Fungorum 26: 10-23. 2009

Telleria, M. Teresa, Duenas, Margarita & Martin, Maria P., 2017, Three new species of Hydnophlebia (Polyporales, Basidiomycota) from the Macaronesian Islands, MycoKeys 27, pp. 39-64 : 54-55

5. Hydnophlebia omnivora (Shear) Hjortstam & Ryvarden, Synopsis Fungorum 26: 10-23. 2009 Figs 6, 9

Basionym.

Hydnum omnivorum Shear, J. Agric. Res. 30: 476. 1925

Type.

USA, C.L.S. Type on Osage Orange [ Macura pomifera ], near Paris, Texas. C.R. Shear coll. Sept. 1903, no. 5267. In herbarium BPI! (holotype).

Description.

Basidiome effuse in small and poorly developed patches, cream-coloured in dry specimens. Hymenophore, according to Burdsall (1985), hydnoid, aculei conical to subcylindrical, 0.6-1 mm long; broken or poorly developed in type material. Margin floccose to fibrillose, white, with strands poorly developed.

Hyphal system monomitic; subicular hyphae 8-11 µm wide, with clamps occasionally double, thick-walled, loosely interwoven; strand hyphae 5-9 µm wide, with a few clamps, thick-walled, colorless; aculei hyphae 4−5 µm wide, without clamps, thin-walled, growing perpendicular to the substrate; subhymenial hyphae 5−6 µm wide, without clamps, thin-walled, densely interwoven, short-celled. Cystidia cylindrical, slightly tapered to apex, thin-walled, 40−70 × 4−5 µm. Basidia cylindrical to subclavate, 17−21 × 6−7 µm, with 4 sterigmata, basal clamp absent. Spores ellipsoid, 5−6.5 × 3−4 µm (L/W = 1.6), thin-walled, colorless, smooth.

Ecology and distribution.

Described from Texas ( Shear 1925). According to Burdsall (1985) this species is distributed in the arid regions of southwestern United States, and probably into southern California and northern Mexico. Also reported from Florida ( Ginns and Lefebvre 1993) and Uruguay ( Martínez and Nakasone 2005).

Remarks.

Molecular analyses indicate that this species is related to H. meloi . Morphologically they can be distinguised by the shape and size of spores, subglobose 4−5.5 × 3−4 µm in H. meloi , and ellipsoid 5−6.5 × 3−4 µm in H. omnivora .