Hydnophlebia gorgonea Telleria, M. Duenas & M.P. Martin

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 : 51

3. Hydnophlebia gorgonea Telleria, M. Duenas & M.P. Martin sp. nov. Figs 6, 7

Diagnosis.

Morphologicaly this species is similar to Hydnophlebia canariensis , but can be distinguished by the strands, well developed in H. canariensis and poorly so in H. gorgonea . Spores ellipsoid to broadly ellipsoid 5−7 × 4−4.5 µm (L/W = 1.4).

Type.

Cape Verde. São Vicente: Mindelo, Ribeira da Vinha, 16°51'49"N; 25°00'09"W, 10 m alt., on Phoenix atlantica , 26 September 2010, M.T. Telleria, 19111Tell. (holotype: MA- Fungi 86659), LSU sequence KF528140, ITS sequence KF483049.

Etymology.

Named after Gorgades, an ancient name for the Cape Verde Islands, Atlantic Ocean.

Description.

Basidiome resupinate, effuse, membraneous, easily separable, light orange-yellow (70. l. OY) to brilliant orange-yellow (67. brill. OY). Hymenophore hydnoid, aculei conical, 0.6−1 mm long. Margin fimbriate, white, with poorly developed strands.

Hyphal system monomitic; subicular hyphae 6−8 µm wide, with clamps, thin- to thick-walled, loosely interwoven, hyaline, encrusted with colorless crystals; strand hyphae 12−15 µm wide, without clamps, thick-walled, sometimes gelatinous and also encrusted; aculei hyphae 3.5−4.5 µm wide, without clamps, thin-walled, colorless, growing perpendicular to the substrate; subhymenial hyphae 4.5−8 µm wide, without clamps, thin-walled, colorless, loosely interwoven, and short- to long-celled. Cystidia cylindrical to ventricose, sometimes capitate, thin-walled, 45−55 × 4−6 µm. Basidia cylindrical to subclavate, 22−24 × 6−8 µm, with 4 sterigmata, basal clamp absent. Spores ellipsoid to broadly ellipsoid 5−7 × 4−4.5 µm (L/W = 1.4), thin-walled, colorless, smooth.

Ecology and distribution.

This species is known from only two localities of São Vicente Island, Cape Verde Archipelago, on decayed wood of Phoenix atlantica and Prosopis juliflora in arid habitats.

Other specimens examined.

Cape Verde. São Vicente: Mindelo, Ribeira da Vinha, 16°51'49"N 25°00'09"W, 10 m alt., on Prosopis juliflora , 26 September 2010, M.T. Telleria, 19110Tell. (MA- Fungi 86658), LSU sequence KF528139, ITS sequence KF483048; M. Dueñas, 13327MD (MA- Fungi 86642), LSU sequence KF528122, ITS sequence KF483031. São Vicente: Ermida , 16°50'26"N; 24°57'23"W, 100 m alt., on Prosopis juliflora , 26 September 2010, M.T. Telleria, 19133Tell. (MA- Fungi 86664), LSU sequence KF528145, ITS sequence KF483054.