Diplotomma venustum (Körb.) Körb.

Diplotomma venustum (Körb.) Körb.

Parerga Lichenol.: 179, 1860. Basionym: Diplotomma alboatrum var. venustum Körb. in Rabenh. - Flecht. Eur., 13: nr. 384, 1858.

Synonyms: Buellia alboatra var. venusta (Körb.) Th. Fr.; Buellia suevica Bertsch; Buellia venusta (Körb.) Lettau; Rhizocarpon alboatrum var. venustum (Körb.) Anzi; Rhizocarpon calcareum auct. ital. p.p.

Distribution: N - VG (Tretiach & al. 2007b), Frl, Ven, Lomb, Piem (Clerc & al. 1999), Emil (Fariselli & al. 2020), Lig (Bungartz & Nash 2004, Giordani & al. 2016). C - Tosc (Brackel 2015), Marc (Nimis & Tretiach 1999), Umb (Nimis & Tretiach 1999, Ravera & al. 2006), Laz (Nimis & Tretiach 2004), Abr (Recchia & Villa 1996, Nimis & Tretiach 1999, Gheza & al. 2021), Mol (Nimis & Tretiach 1999, Caporale & al. 2008). S - Camp (Aprile & al. 2003b, Nimis & Tretiach 2004), Pugl (Nimis & Tretiach 1999, Durini & Medagli 2002), Bas (Nimis & Tretiach 1999, Brackel 2011), Cal (Puntillo 1996), Si (Nimis & al. 1996b).

Description: Thallus crustose, episubstratic, white to pale grey, continuous to verrucose-areolate, very thick, forming up to 4 cm wide, orbicular patches. Cortex colourless, indistinctly paraplectenchymatous; medulla chalky white, I-. Apothecia lecideine, at first immersed then subsessile, 0.4-1.5 mm across, with an initially flat, then soon strongly convex, often slightly white-pruinose disc, a thin, soon excluded proper margin, and usually a pseudothalline margin in young apothecia. Proper exciple dark brown in section, not continuous with hypothecium; epithecium brown; hymenium colourless, K/I+ blue; paraphyses simple, 1-1.5 μm thick at mid-level, the apical cells 2.5-4.5 μm wide; hypothecium pale brown. Asci 8-spored, clavate to cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass), the wall I-, but the thin outer gel I+ blue, approaching the Bacidia-type. Ascospores 3-septate, brown, ellipsoid, often slightly curved, 16-22 x 7-10 μm. Photobiont chlorococcoid. Spot tests: medulla K+ yellow turning red (needle-like crystals), C-, KC-, P+ yellow, UV-. Chemistry: medulla with norstictic acid.

Note: this mild-temperate to Mediterranean lichen, at least when young, is a constant parasite on Protoparmeliopsis versicolor, reaching above treeline south of the Alps. Morphological and biological differences towards D. hedinii are so evident that the synonymisation of the two taxa proposed by Nordin (1996), based on samples from southern Sweden (!) and on chemical characters only, is not accepted here. See also note on D. hedinii and Roux & Gueidan (2002: 145-146).

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

paras Protoparmeliopsis versicolor

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: very rare

Oromediterranean belt: very rare

Montane belt: rare

Submediterranean belt: rather common

Padanian area: absent

Humid submediterranean belt: rather common

Humid mediterranean belt: rather rare

Dry mediterranean belt: rare

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

Felix Schumm – CC BY-SA 4.0

[14942], Germany, Baden-Württemberg, Kreis Esslingen, Weilheim, am Gipfel der Limburg, auf Kalksteinen, ca. 590 m. Leg. et det. Schumm 12.07.2009.

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

Herbarium: TSB (32041)
2001/12/09

A. Moro; Owner: Department of Life Sciences, University of Trieste

Sicilia, TP, Erice, dintorni della città
2008.04.05

A. Moro; Owner: Department of Life Sciences, University of Trieste

Sicilia, TP, Erice, dintorni della città
2008.04.05

A. Moro; Owner: Department of Life Sciences, University of Trieste

Sicilia, TP, Erice, dintorni della città
2008.04.05

A. Moro; Owner: Department of Life Sciences, University of Trieste

Sicilia, TP, Erice, dintorni della città
2008.04.05

A. Moro; Owner: Department of Life Sciences, University of Trieste

Sicilia, TP, Erice, dintorni della città
2008.04.05

Felix Schumm – CC BY-SA 4.0

[14942], Germany, Baden-Württemberg, Kreis Esslingen, Weilheim, am Gipfel der Limburg, auf Kalksteinen, ca. 590 m. Leg. et det. Schumm 12.07.2009.

Felix Schumm – CC BY-SA 4.0

[14942], Germany, Baden-Württemberg, Kreis Esslingen, Weilheim, am Gipfel der Limburg, auf Kalksteinen, ca. 590 m. Leg. et det. Schumm 12.07.2009.

Felix Schumm – CC BY-SA 4.0

[14942], Germany, Baden-Württemberg, Kreis Esslingen, Weilheim, am Gipfel der Limburg, auf Kalksteinen, ca. 590 m. Leg. et det. Schumm 12.07.2009.

Felix Schumm – CC BY-SA 4.0

[14942], Germany, Baden-Württemberg, Kreis Esslingen, Weilheim, am Gipfel der Limburg, auf Kalksteinen, ca. 590 m. Leg. et det. Schumm 12.07.2009.

Felix Schumm – CC BY-SA 4.0

[14942], Germany, Baden-Württemberg, Kreis Esslingen, Weilheim, am Gipfel der Limburg, auf Kalksteinen, ca. 590 m. Leg. et det. Schumm 12.07.2009.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010.

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

Herbarium: TSB (32041)
2001/12/09

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010

Felix Schumm – CC BY-SA 4.0

[16508],Germany, Baden-Württemberg, Kreis Göppingen, Gosbach- Bad Ditzenbach, Tierstein, 48,57461° N, 9,68471° E, 737 m, auf Kalkfelsen am Albrand. Leg. et det. Schumm 20.06.2010

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1278&lang=en

France, Provence, Mérindole

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1278&lang=en

France, Provence, Mérindole

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1278&lang=en

France, Provence, Mérindole

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1278&lang=en

France, Provence, Mérindole

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1278&lang=en

France, Provence, Mérindole

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