ITALIC 8.0

Japewia gyrophorica Palice, Malíček & Vondrák

in Vondrák & al., Preslia, 95, 3: 336, 2023.

Synonyms:

Distribution:

Description: Thallus crustose, episubstratic, grey-, reddish- to dark chocolate brown when dry, olive- or reddish brown when wet, sorediate-blastidiate, forming small patches among other crustose lichens, which later may merge, covering extensive areas. Initially the thallus is formed by up to 0.15-0.2 mm wide, dispersed, brownish areoles/granules, which rather soon proliferate, forming delimited, brown soralia that finally merge into a more-less continuous, exceptionally up to 1 mm thick crust. Mature external soredia/blastidia enveloped by a distinct fungal cover of tightly and irregularly arranged, c.3 μm thick, elongate hyphae (not forming a pseudoparenchyma) forming an unevenly brown-pigmented outer wall, the hyphae occasionally showing slightly enlarged, 3.5-5 μm wide, dark-capped terminal cells. The sorediate-blastidiate surface often erodes, exposing the inner layer of much paler, greenish white to almost white younger soredia. Soredia 15-45 μm in diam., eventually gathered into up to 60-65 μm consoredia. Photobiont chlorococcoid, Trebouxialike, the cells 5-12(-18) μm in diam, the algal daughter cells soon visibly separated by hyphae. Spot tests: K-, C+ fleeting red, P-, UV- or UV+ faintly bluish-white. Chemistry: gyrophoric acid.

Note: a recently-described species known only in the sterile state, growing on acid bark (rarely also on lignum) in montane, humid forests. The species is hitherto known from several stations in eastern Europe, but is probably more widespread, being easily confused with sterile specimens of the chemically and morphologically similar Placynthiella dasaea. For further details see Vondrák & al. (2023). To be looked for in Italy.

Growth form: Crustose

Substrata: bark and lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model

Source:Vondrák J., Svoboda S., Košnar J., Malíček J., Šoun J., Frolov I., Svensson M., Novotný P., Palice Z. 2023. Preslia 95(3): 311-345.