Gloeodontia halocystidiata 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 : 43-44

publication ID	https://doi.org/ 10.11646/phytotaxa.67.1.3
DOI	https://doi.org/10.5281/zenodo.5067440
persistent identifier	https://treatment.plazi.org/id/CF1F87A5-8552-4F3C-FF36-EDF3FF3F6462
treatment provided by	Felipe
scientific name	Gloeodontia halocystidiata Gorjón
status	sp. nov.

Treatment

Gloeodontia halocystidiata Gorjón View in CoL sp. nov.

Species ab aliis congeneribus affinis sed differt frequentia halocystidiorum.

Etymology: — halus (Latin), referring to the halo present in the apex of some cystidial elements.

Type: — BRAZIL. Roraima: Alto Alegre - Amajari, Maracá Ecological Station , 26 Sep 2008, on dead trunks, leg. M.A. Jesus, LPM 4631 (holotypus) .

MycoBank: MB 800945

Basidiome resupinate, effused, hymenophore creamish brown, odontioid with conical to flattened aculei, margin not differentiate. Hyphal system dimitic, generative hyphae with clamps, 2–3 µm in diam., skeletal hyphae thick-walled, 2–4 µm in diam., smooth or encrusted, hyaline or yellowish brown. Gloeocystidia long tubular, walls slightly thickened towards the base, variable in length up to 100–120 µm, 5–8 µm in diam., apex obtuse or with a schizopapilla, with oily contents in KOH, yellowish in Melzer’s reagent. Skeletocystidia arising from skeletal hyphae, variably encrustated with hyaline crystals, usually 30–40 × 6–8 µ m. Halocystidia with a resinous brown globule about 8–12 µm in diam. Core of aculei mainly composed of skeletal hyphae and halocystidia while the hymenium on aculei is formed as a palisade of gloeocystidia and basidia. Skeletocystidia occurs primarily at the base of the aculei or the hymenium between the aculei. Basidia clavate, 10–15 × 3–4 µm, with four sterigmata, and a basal clamp. Basidiospores ovoid to ellipsoid, 3.5–4 × 2–2.5 µm, thin-walled, seemingly smooth or slightly rugose, ornamentations difficult to observe, amyloid ( Figs. 6, 7 View FIGURE 5–8 , 19 View FIGURE 17–22 ).

The species is characterized by an odontioid hymenophore, dimitic hyphal system, presence of gloeocystidia and encrusted skeletocystidia, and above all by the presence of halocystidia capped with a globule of brown resinous matter. Halocystidia are easily distinguishable elements in the core of the aculei. Gloeodontia Boidin seems to be the appropriate genus considering macro- and micromorphology, even though halocystidia were not described in the genus. Presence of halocystidia can be regarded as a variation at the species level as it occurs in some species of other corticioid genera like Peniophorella P. Karst. , Resinicium Parmasto or Hyphodontia sensu lato J. Erikss.

Additional specimens examined: — BRAZIL, Roraima: Alto Alegre - Amajari, Maracá Ecological Station , 26 Sep 2008, on dead trunks, leg. M.A. Jesus, LPM 4539, 4541, 4542, 4553, 4575, 4577, 4630, 4632, 4633 .