Cladonia gumboskii Aptroot, M.F. Souza & Spielmann, 2021

Aptroot, André, Souza, Maria Fernanda & Spielmann, Adriano Afonso, 2021, Two new crustose Cladonia species with strepsilin and other new lichens from the Serra de Maracaju, Mato Grosso do Sul, Brazil, Cryptogamie, Mycologie 20 (8), pp. 137-148 : 143

publication ID	https://doi.org/ 10.5252/cryptogamie-mycologie2021v42a8
DOI	https://doi.org/10.5281/zenodo.12214686
persistent identifier	https://treatment.plazi.org/id/03F987C6-FFDD-BB59-FEDA-FE84EB5AFA0A
treatment provided by	Felipe
scientific name	Cladonia gumboskii Aptroot, M.F. Souza & Spielmann
status	sp. nov.

Treatment

Cladonia gumboskii Aptroot, M.F. Souza & Spielmann View in CoL , sp. nov.

( Fig. 1 View FIG )

MYCOBANK. — MB 83946.

DIAGNOSIS. — Saxicolous Cladonia with microsquamulose much incised thallus containing lichexanthone and strepsilin, thin, paraplectenchymatous upper cortex, and sessile, almost black, strongly concave pycnidia.

TYPE. — Brazil. Santa Catarina, São Bento do Sul, APA Rio Vermelho, on siliceous rock near river, 1.IV.2019, A.Aptroot 78841 (holo-, CGMS; iso-, ABL).

ADDITIONAL MATERIAL STUDIED. — Brazil. Mato Grosso do Sul: Aquidauana, Vila Piraputanga, alt. 250 m, 20°29’S, 55°29’W, on exposed sandstone rock, 26.XI.2019, A.Aptroot 80481; same details, 80505; Mato Grosso: Cuiaba, Chapada dos Guimarães, on sandstone, 12-18.IX.2020, A.Aptroot & M.F. Souza 81722; São Paulo: Piquete, on rock, I.2007, L.Canêz 2458; Rio Grande do Sul: Canguçu, Florida, on soil, 16.VII.2019, A.Aptroot 79345; Piratini, Cerro do Ubaldo, 17.VII.2019, A.Aptroot 79484 (para-, CGMS); Paraná: Curitiba. S.Eliasaro s.n. (para-, JOI).

ETYMOLOGY. — Named after Emerson Gumboski,specialist of Brazilian Cladonia and the first to recognize that this was a remarkable species.

ECOLOGY AND DISTRIBUTION. — On exposed siliceous rock; only known from Brazil.

DESCRIPTION

Thallus crustose, mineral grey, consisting of scattered to dense, c. 0.2-0.4 mm diam., mostly appressed squamules, corticate. Squamules flat, crenate, contiguous or somewhat overlapping, sometimes ascending at the tips, sometimes mozaic-forming. Thallus 140-210 µm thick, upper cortex hyaline, 1-2 cells thick, c. 5-8 µm, paraplectenchymatous. Ascomata not observed. Pycnidia common, usually centrally in the thalli, almost black, sessile on the thallus, c. 0.2 mm diam., strongly concave.Conidia not seen.Chemistry.Thallus UV+ bright yellow, C+ blue green, P-, K-. TLC: lichexanthone and strepsilin.