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).