Dendrothele nakasoneae Gorjón, 2012

Gorjón, Sergio P. & Jesus, Maria Aparecida De, 2012, Some new species and new records of corticioid fungi (Basidiomycota) from the Brazilian Amazon, Phytotaxa 67 (1), pp. 38-54 : 41-42

Dendrothele nakasoneae Gorjón sp. nov.

Species ab aliis congeneribus affinis sed saepe differt parva et incrustata propagatio hypharum et hyphidiis capitatis exiguis.

Etymology: —Named to honor Dr. Karen K. Nakasone ( USA), in recognition of her contributions to the taxonomy of corticioid fungi.

Type: — BRAZIL. Manaus, Praça de São Sebastião (in front of Teatro Amazonas), on bark of living Licania tomentosa (Benth.) Fritsch (Chrysobalanaceae) , 17 Apr 2012, leg S. P. Gorjón, SPG 3473 (holotypus).

MycoBank: MB 800943

Basidiome resupinate, white to pale cream, hymenial surface smooth, margin abrupt. Hyphal system monomitic, hyphae simple-septate, about 2–3 µm in diam, usually encrusted, hyphae often laterally with a small needle-like encrusted projection. Hymenium composed of basidia, gloeocystidia, protruding capitate hyphidia, and unbranched hyphidia. Capitate hyphidia variable in length, often arising in two or three from the same hyphal segment, capitate apex about 3–3.5 µm in diam. Other hyphidia abundant in the hymenial layer, about 2 µm in diam., sinuous, unbranched. Gloeocystidia ovoid to irregularly tubular or with protuberances, with abundant oily contents, yellowish in Melzer's reagent. Basidia tubular to clavate, 50–60 × 9–12 µm, with four sterigmata, collapsing after discharging the basidiospores. Basidiospores ellipsoid to ovoid, 10–12 × 8–10 µm, smooth, thin-walled, with abundant oily contents, IKI-, acyanophilous. ( Figs. 3 , 17 ).

The species is characterized by the simple-septate, usually encrusted hyphae some of them with small needle-like encrusted projections, small hyphidia with capitate apex, gloeocystidia, and ellipsoid to ovoid basidiospores. It is a common species on bark of living L. tomentosa , a species from northeast Brazil, but frequently cultivated in gardens and streets of Manaus. Dendrothele capitulata Boidin & Lanquetin , described from Guadeloupe in the Lesser Antilles, has simple-septate hyphae and larger, capitate cystidia but differing in larger subglobose basidiospores ( Boidin et al. 1996).

Additional specimens examined: — BRAZIL, Amazonas, Manaus city, Praça de São Sebastião (in front of Teatro Amazonas), on bark of living L. tomentosa , 17 Apr 2012, leg S. P. Gorjón, SPG 3457, 3472, 3474; Manaus city, Av. Fernao Dias, on bark of living L. tomentosa , 17 Apr 2012, leg. S. P. Gorjón, SPG 3476; Manaus city, Av. Paraíba, on bark of living L. tomentosa , 15 Apr 2012, leg. M. A. Jesus, LPM 7445; Manaus, INPA Campus, Bosque da Ciência, on bark of living L. tomentosa , 5 Apr 2012, leg. S. P. Gorjón, SPG 3458.

Figures

FIGURE 1–4. 1. Ceraceopsis verruculosa. 2. Dendrothele andina. 3. Dendrothele nakasoneae. 4. Dendrothele ornata. a. Basidiospores. b. Basidia. ca. Capitate hyphidia. d. dendrohyphidia. en. needle-like encrusted projections. g. Gloeocystidia. h. Hyphae (generative). hc. Host cells. hp. Hyphal pegs. i. Hyphidia. p. Probasidia. sh. Subicular hyphae.

FIGURE 17–22. Basidiomes of type specimens. 17. Dendrothele nakasoneae. 18. Dendrothele ornata. 19. Gloeodontia halocystidiata. 20. Gloiothele incrustata. 21. Gloiothele larssonii. 22. Peniophora wallacei. Bar 1 cm