ITALIC 8.0

Parmelina clandestina Barcenas-Peña, Divakar, A. Crespo, Núñez-Zapata, Lumbsch & Grewe

J. of Fungi, 9, 12, no. 1180: 8, 2023.

Synonyms:

Distribution: N - Frl (Barcenas-Peña & al. 2023). C - Tosc (Barcenas-Peña & al. 2023).

Description: Thallus foliose, heteromerous, forming regular rosettes. Lobes pale mineral grey to blue-grey, more or less shiny, usually pruinose, rounded at apices, smooth, faintly maculate, 2-7 mm wide, with undulate to incised margins and characteristically rounded, eciliate axils, the central parts of thallus with a dense cover of cylindrical, frequently branched, 0.5-1.5 mm tall isidia, concolorous with thallus in lower part, brown to black at tips; lower surface brown at margin, otherwise black, with black, mostly simple, 1-2 mm long rhizines. Upper cortex of tightly packed, anticlinally oriented hyphae, with a pored epicortex, the cell walls with isolichenan; medulla white; algal layer continuous; lower cortex paraplectenchymatous, with rounded and thick-walled cells. Apothecia very rare, lecanorine, up to 4 mm across, with a brown disc and a usually isidiate thalline margin. Epithecium brownish; hymenium and hypothecium colourless. Asci 8-spored, Lecanora-type. Ascospores 1-celled, hyaline, short-ellipsoid, 9-13 x 5-7 μm. Pycnidia rare, appearing as black dots. Photobiont chlorococcoid. Spot tests: upper cortex K+ yellow, C-, KC-, P-; medulla K-, C+ red, KC+ red, P- or P+ faintly yellow, UV-. Chemistry: upper cortex with atranorin, medulla with lecanoric acid.

Note: a cryptic epiphytic species, which can be distinguished from the sympatric P. tiliacea only by genome data of single-nucleotide polymorphisms (SNPs) produced by RAD sequencing, hitherto known from Germany, Italy, Morocco, Portugal, Slovenia, Spain, Turkey, and the UK. For further details see Barcenas-Peña & al. (2023).

Growth form: Foliose, broad lobed

Substrata: bark

Photobiont: green algae other than Trentepohlia

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

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: very rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

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5

(info)

Solar irradiation:

1

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4

5

(info)

Aridity:

1

2

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5

(info)

Eutrophication:

1

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5

(info)

Poleotolerance:

0

1

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3

(info)

Altitudinal distribution:

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6

(info)

Predictive model

Source: Barcenas-Peña A., Divakar P.K., Crespo A., Núñez-Zapata J., Lumbsch H.T., Grewe F. 2023. Reference-based restriction-site-associated DNA sequencing data are useful for species delineation in a recently diverged asexually reproducing species complex (Parmeliaceae, Ascomycota). J. of Fungi, 9, 12:1180.

holotype