Dermatocarpon meiophyllizum Vain.

Acta Soc. Fauna Fl. Fenn., 49, 2: 14, 1921.
Synonyms: Dermatocarpon bachmannii Anders var. inundatum Klem.; Dermatocarpon leptophyllum auct.ital. p.p.; Dermatocarpon meiophyllum Vain.
Distribution: N - Ven, TAA, Lomb. C - Sar. S - Camp (Ricciardi & al. 2000).
Description: Thallus foliose-umbilicate, monophyllous, (4-)15-20(-30) mm wide, rather thick (0.4-0.8 mm thick when dry), attached by a central holdfast. Upper surface pale to dark brown; lower surface usually darker brown than upper surface, smooth or finely granulose. Upper cortex hyaline, except the brown outermost part, with an epinecral layer of compressed hyphae. Medulla white, of 2-4 μm thick hyphae; lower cortex colourless except the brown outermost part, consisting of 7-9 cell layers. Perithecia black, completely immersed, without involucrellum, the wall colourless except in the brown uppermost part. Hamathecium or periphyses and periphysoids, interascal filaments absent; hymenial jelly hemiamyloid. Asci 8-spored, clavate, the wall thickened above, not amyloid. Ascospores 1-celled, hyaline, ellipsoid, (11-)14-18(-23) x (5-)6-8(-10) μm. Pycnidia common, more or less spherical, black. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: cortex and and medulla K-, C-, KC-, P-, UV-. Chemistry: no lichen substances.
Note: on periodically inundated siliceous rocks, especially in the splash zone of lake shores or along creeks, in seepage tracks on slightly sloping faces. For further information see Orange (1998).
Growth form: Foliose, umbilicate
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Periodically submerged (e.g. in creeks)

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: very rare
Oromediterranean belt: very rare
Montane belt: extremely rare
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: extremely rare
Humid mediterranean belt: absent
Dry mediterranean belt: absent


pH of the substrata:

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5

Solar irradiation:

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5

Aridity:

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Eutrophication:

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Poleotolerance:

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0

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Altitudinal distribution:

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5





Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Clearwater Valley, Dawson Falls Date: 2012-04-03 On river shore boulder in waterfall sprayzone



Elena Pittao; Owner: Derpartment of Life Sciences, University of Trieste CC BY-SA 4.0
Herbarium: TSB (8129)
02/02/2017



Elena Pittao; Owner: Derpartment of Life Sciences, University of Trieste CC BY-SA 4.0
Herbarium: TSB (8129)
02/02/2017



Elena Pittao; Owner: Derpartment of Life Sciences, University of Trieste CC BY-SA 4.0
Herbarium: TSB (8129)
02/02/2017



Elena Pittao; Owner: Derpartment of Life Sciences, University of Trieste CC BY-SA 4.0
Herbarium: TSB (8129)
02/02/2017