ITALIC 8.0

Leproplaca obliterans (Nyl.) Arup, Frödén & Søchting

in Arup & al., Nord. J. Bot., 31: 72, 2013. Basionym: Placodium obliterans Nyl. - Flora, 57: 7, 1874.

Synonyms: Caloplaca obliterans (Nyl.) Blomb. & Forssell; Gasparrinia obliterans (Nyl.) Dalla Torre & Sarnth.; Lecanora obliterans (Nyl.) Nyl.; Physcia obliterans (Nyl.) Arnold; Placodium cirrochroum var. obliterans (Nyl.) A.L. Sm.

Distribution: N - Ven, TAA, Lomb, Piem (TSB 32645), VA (Piervittori & Isocrono 1999, Matteucci & Vanacore Falco 2015), Lig (TSB 33430). C - Tosc (Tretiach & al. 2008). S - Camp (Jatta 1909-1911), Si (Jatta 1909-1911).

Description: Thallus crustose, episubstratic, ochraceous yellow or pale to dark orange, continuous to areolate, forming irregular patches, often delimited by a thin, dendritic, pale orange prothallus. Areoles irregular, often minutely lobed, flat to convex, scattered to crowded, epruinose, up to 1(-1.5) mm long and to 0.3 mm wide, the central ones with concave and eroded, 0.1-0.5 mm wide, yellow to yellow-orange soralia. Apothecia rather rare, up to 0.5 mm across, with a flat to slightly convex, orange disc and a thin, concolorous or slightly paler thalline margin. Epithecium brownish orange, K+ red; hymenium colourless, 50-65 μm high; paraphyses sparingly branched in upper part, the apical cells up to 5 μm thick; hypothecium colourless, 40-50 μm high. Asci 8-spored, clavate, functionally unitunicate, apically thickened with a broad internal beak, the inner part of apex and external cap I+ blue, Teloschistes-type. Ascospores 1-septate, polarilocular, hyaline, ellipsoid, 10-14 x 4-6 μm, the septum 2-4 μm thick (c. 1/3 of spore length). Photobiont chlorococcoid. Spot tests: thallus and apothecia K+ red, C-, KC-, P-. Chemistry: thallus and apothecia with parietin (major), fallacinal, emodin, teloschistin and parietinic acid (minor), corresponding with chemosyndrome A of Søchting (1997).

Note: a cool-temperate to boreal-montane, circumpolar species found under overhangs of basic siliceous rocks, especially calcareous schists, mostly in upland areas; most frequent in the Alps, but also present in the Mediterranean mountains.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

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

In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: rare

Oromediterranean belt: absent

Montane belt: rather common

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:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF

Jan Vondrak https://botanika.prf.jcu.cz/lichenology/index.php?pg=8&cat=32&idx=16279

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (32645)
2001/11/14

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php (Courtesy: Anita Stridvall)

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php (Courtesy: Anita Stridvall)

Jan Vondrak - Source: https://botanika.prf.jcu.cz/lichenology/index.php?pg=8&cat=32&idx=16279