ITALIC 7.0

Dermatocarpon leptophyllodes (Nyl.) Zahlbr.

Cat. Lich. Univ., 1: 219, 1921. Basionym: Endocarpon leptophyllodes Nyl. - Flora, 59: 576, 1876.

Synonyms: Dermatocarpon diffractum (Th. Fr.) Blomb. & Forssell; Dermatocarpon lorenzianum Anders; Dermatocarpon miniatum var. diffractum Th. Fr.; Dermatocarpon phonolithicum Anders

Distribution: N - VA (Piervittori & al. 2004). S - Cal (Puntillo 1996).

Description: Thallus foliose, monophyllous, consisting of 1-4 mm wide, subumbilicate, usually densely aggregated lobes, forming over 3 cm wide patches. Upper surface grey, lower surface brown to dark brown, smooth. Upper cortex composed of cells aarranged in irregular vertical columns; epinecral layer (best visible along margins) of broken, air-filled cells; medulla white, I-. Perithecia black, immersed in the thallus, without involucrellum, 0.2-0.3 mm high and 0.16-1.26 mm wide. Exciple colourless except in the brown uppermost part; hamathecium of periphyses and periphysoids, interascal filaments absent; hymenial gel hemiamyloid. Asci 8-spored, cylindrical-clavate, fissitunicate, the wall thickened above, not amyloid. Ascospores 1-celled (to rarely 1-septate when overmature), hyaline. ellipsoid to narrowly ellipsoid, 13-21 x 5-8 µm. Pycnidia common, black, immersed. Conidia bacilliform. Photobiont chlorococcoied. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a temperate to southern boreal-montane species found on periodicaly inundated surfaces of basic siliceous rocks. The species is not easily recognised as belonging to Dermatocarpon, the thallus consisting of tightly arranged squamiform lobes (but with the pseudoparenchymatic lower cortex which is typical for the genus). For further details see Orange (1998).

Growth form: Squamulose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Periodically submerged (e.g. in creeks)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: very rare

Oromediterranean belt: extremely rare

Montane belt: extremely rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

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4

5

6

(info)

Predictive model

Herbarium samples

Curtis Randall Björk CC BY-SA 4.0

Clearwater Valley, BC, First Canyon Uplands On cliffs of pillow basalt on south-facing slope, dry, lightly forested
2011-05-05

Curtis Randall Björk – CC BY-SA 4.0

Clearwater Valley, BC, First Canyon Uplands Date: 2011-05-05 On cliffs of pillow basalt on south-facing slope, dry, lightly forested