Trapelia placodioides Coppins & P. James

Trapelia placodioides Coppins & P. James

Lichenologist, 16: 257, 1984.

Synonyms:

Distribution: N - VG, TAA (Thor & Nascimbene 2007, Lang 2009, Nascimbene & al. 2022), Piem (Isocrono & al. 2006, Gheza & Nascimbene 2024), Lig (Ravera & al. 2022). C - Tosc (Brackel 2015). S - Camp (Nimis & Tretiach 2004).

Description: Thallus crustose, episubstratic, rimose-areolate in central parts, almost placodioid at margins, whitish to pale pinkish grey, matt, slightly pruinose, sometimes delimited by a whitish prothallus. Soralia frequent, usually arising at the margins of areoles, flat, pale green to pale greenish brown, irregular in shape, remaining small and not obscuring the thallus, with farinose, 20-30 µm wide soredia. Cortex c. 1-3 μm thick, poorly differentiated, of rounded cells; medulla white. Apothecia very rare, lecideine, 0.2-0.8 mm across, round, with a flat, brown-red to blackish brown disc and a thin, soon excluded proper margin, sometimes surrounded by a collar of disrupted thallus (pseudothalline margin) when young. Proper exciple of colourless hyphae embedded in a colourless to weakly pigmented gel; epithecium brown; hymenium colourless; paraphyses coherent, strongly branched and anastomosing in upper part, not thickened at apex; hypothecium colourless to very pale brown. Asci 8-spored, cylindrical-clavate, unitunicate, thin-walled, the apical dome K/I-, or weakly K/I+ blue, Trapelia-type. Ascospores 1-celled, hyaline, ellipsoid, 14-24 x 8-12 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C+ red, P-, UV+ white. Chemistry: gyrophoric acid.

Note: on base- rich or slightly calciferous siliceous substrata, sometimes also on walls, in humid areas, with optimum below the montane belt; probably more widespread, but never common.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

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

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: rare

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

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/

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

Herbarium: TSB (10938)
2001/12/11

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

Herbarium: TSB (10938)
2001/12/11
upper surface with soredia

Curtis Randall Björk, - CC BY-SA 4.0

Vancouver Island, British Columbia, Canada
2018

Felix Schumm – CC BY-SA 4.0

[11827], Germany, Nordrhein-Westfalen, Eifel, Nettersheim, Urfttal bei Nettersheim, auf Bahndammschotter. Leg. Schumm, Follmann & Dürhammer 23.10.2004, det. Schumm 29.10.2004, test. Aptroot 2011.

Felix Schumm – CC BY-SA 4.0

[11827], Germany, Nordrhein-Westfalen, Eifel, Nettersheim, Urfttal bei Nettersheim, auf Bahndammschotter. Leg. Schumm, Follmann & Dürhammer 23.10.2004, det. Schumm 29.10.2004, test. Aptroot 2011.

Felix Schumm – CC BY-SA 4.0

[11827], Germany, Nordrhein-Westfalen, Eifel, Nettersheim, Urfttal bei Nettersheim, auf Bahndammschotter. Leg. Schumm, Follmann & Dürhammer 23.10.2004, det. Schumm 29.10.2004, test. Aptroot 2011.

Felix Schumm – CC BY-SA 4.0

[5735], USA, Pennsylvania, Loleta Trail near east branch of Millstone Creel. Loleta Recreation Area, Allegheny Nat'l Forest, 10 km s.e. of Marienville on State Rd. 24041; Millstone Tp., Elk Co. At trailside. Leg. S.R. Olszewski 26.07.1997 [as No. 04500b], det. S.R. Olszewski 30.07.1997.

Felix Schumm – CC BY-SA 4.0

[5735], USA, Pennsylvania, Loleta Trail near east branch of Millstone Creel. Loleta Recreation Area, Allegheny Nat'l Forest, 10 km s.e. of Marienville on State Rd. 24041; Millstone Tp., Elk Co. At trailside. Leg. S.R. Olszewski 26.07.1997 [as No. 04500b], det. S.R. Olszewski 30.07.1997.

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

Felix Schumm – CC BY-SA 4.0

[5735], USA, Pennsylvania, Loleta Trail near east branch of Millstone Creel. Loleta Recreation Area, Allegheny Nat'l Forest, 10 km s.e. of Marienville on State Rd. 24041; Millstone Tp., Elk Co. At trailside. Leg. S.R. Olszewski 26.07.1997 [as No. 04500b], det. S.R. Olszewski 30.07.1997.

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/

Felix Schumm CC BY-SA 4.0

[5735], USA, Pennsylvania, Loleta Trail near east branch of Millstone Creel. Loleta Recreation Area, Allegheny Nat'l Forest, 10 km s.e. of Marienville on State Rd. 24041; Millstone Tp., Elk Co. At trailside
Leg. S.R. Olszewski 26.07.1997 [as No. 04500b], det. S.R. Olszewski 30.07.1997.

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Commana

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Commana

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Commana

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Commana

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Tregarvan

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Tregarvan

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Commana

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, St. Cadou, Eglise

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Roscanvel

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Roscanvel

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Roscanvel

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Roscanvel

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Roscanvel

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Roscanvel

Alain Gerault - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Le Loc'h

Alain Gerault - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Le Loc'h

Alain Gerault - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=608&lang=en

France, Le Loc'h

Ulrich Kirschbaum

Central Europe; Germany: Hesse.

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