Hydnophlebia meloi 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 : 51-54

4. Hydnophlebia meloi Telleria, M. Duenas & M.P. Martin sp. nov. Figs 6, 8

Diagnosis.

Similar to Hydnophlebia omnivora but differs in having subglobose spores, 4−5.5 × 3−4 µm (L/W = 1.2), instead of ellipsoid, 5−6.5 × 3−4 µm (L/W = 1.6). This is the only species in the genus with subglobose spores.

Type.

Cape Verde. Fogo: Mosteiros, Miradouro, 15°01'41"N; 24°19'13"W, 283 m alt., on Sarcostemma daltonii , 24 September 2010, M.T. Telleria, 19071Tell. (holotype: MA- Fungi 86654), LSU sequence KF528135, ITS sequence KF483044.

Etymology.

Named after Ireneia Melo, colleague and friend, Portuguese mycologist from the Botanical Garden of the University of Lisbon.

Description.

Basidiome resupinate, effuse, membraneous to ceraceous, yellowish white (92. y White) to pale orange-yellow (73. p. OY) in dry specimens. Hymenophore hydnoid, aculei conical, 0.5−1 mm long, in dried specimens usually broken. Margin fimbriate, yellowish white, with strands.

Hyphal system monomitic; subicular hyphae 6−7.5 µm wide, with clamps, thick-walled, loosely interwoven; strand hyphae 6−7.5 µm wide, with clamps occasionally double, thick-walled, sometimes encrusted with colorless crystals; aculei hyphae 3.5−4.5 µm wide, without clamps, thin-walled, growing perpendicular to the substrate; sub hymenial hyphae 3.5−4.5 µm wide, without clamps, thin-walled, loosely interwoven, short- to long-celled. Cystidia cylindrical, thin-walled, 40−55 × 3−4 µm. Basidia cylindrical to subclavate, 18−26 × 5−7 µm, with 4 sterigmata, basal clamp absent. Spores subglobose 4−5.5 × 3−4 µm (L/W = 1.2), thin-walled, colorless, smooth.

Distribution.

Rocky steep slopes, on Sarcostemma daltonii , endemic climbing herb of Cape Verde Archipelago. Only known from the type locality in Fogo Island.

Other specimens examined.

Cape Verde. Fogo: Mosteiros, Miradouro, 15°01'41"N; 24°19'13"W, 283 m alt., on Sarcostemma daltonii , 24 September 2010, M.T. Telleria, 19072Tell. (MA- Fungi 90746).