Heterodermia speciosa (Wulfen) Trevis.

Atti Soc. Ital. Sc. Nat. Milano, 11: 614, 1868. Basionym: Lichen speciosus Wulfen in Jacquin - Coll. Bot., 3: 119, 1791.
Synonyms: Anaptychia speciosa (Wulfen) A. Massal.; Parmelia speciosa (Wulfen) Ach.; Physcia speciosa (Wulfen) Nyl.; Squamaria speciosa (Wulfen) Frege
Distribution: N - Frl (Tretiach 1993), Ven (Tretiach 1993, Lazzarin 1997, Nascimbene & al. 2007, 2009c), TAA (Nascimbene 2001b, Nascimbene & al. 2007b, 2022, Nimis & al. 2015), Lomb (Philippi 1983 Tretiach 1993,), Piem (Tretiach 1993, Isocrono & al. 2004), VA (Piervittori & Isocrono 1999), Emil (Fariselli & al. 2020), Lig (Brunialti & al. 2001). C - Tosc (Tretiach 1993), Marc, Abr (Nimis & Tretiach 1999, Gheza & al. 2021), Laz (Ravera & al. 2023b), Sar (Zedda 2002, Rizzi & al. 2011, Di Nuzzo & al. 2022). S - Camp (Aprile & al. 2003b), Cal (Tretiach 1993, Puntillo 1996), Si (Nimis & al. 1994).
Description: Thallus foliose, heteromerous, dorsiventral, narrow-lobed, adpressed, forming orbicular to irregular, 2-3(-4) cm wide rosettes, often coalescing with other thalli forming larger colonies. Lobes linear-elongate, dichotomously branched, (0.5-)1-2 mm wide, flat to slightly convex, slightly widening towards apices, with or without pale marginal cilia. Upper surface ivory white to cream-coloured, the lobe-tips sometimes darkening, with grey to bluish grey soredia in labriform soralia at the tip of lateral lobes. Lower surface white to tan, with a few, scattered, short and robust, usually black rhizines. Upper cortex prosoplectenchymatous; medulla white; lower cortex prosoplectenchymatous. Apothecia extremely rare in European material, lecanorine, 3-8 mm across, with a dark brown disc and a crenulate thalline margin. Asci 8-spored, clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, (25-)30-37 x (12-)14-18 µm, Pachysporaria-type. Pycnidia very rare, black, immersed. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: cortex K+ yellow, C-, KC-, P+ pale yellow; medulla K+ yellow, C-, KC-, P-. Chemistry: cortex with atranorin and chloroatranorin; medulla with atranorin, zeorin and an unidentified triterpene.
Note: a temperate species found on bark, epiphytic bryophytes, sometimes on mossy rocks in humid, mostly montane woodlands. It is included in the Italian red list of epiphytic lichens as “Near-threatened” (Nascimbene & al. 2013c).
Growth form: Foliose, narrow lobed
Substrata: bark
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)

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: 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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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples


P.L. Nimis CC BY-SA 04
TSB 5299


A. Aptrroot; Owner: A. Aptroot



Felix Schumm - CC BY-SA 4.0
[057], Österreich, Land Salzburg, Hohe Tauern, Krimmel, Weg am rechten Aachenufer bis zum Bahnhof, ca 1000 m, an Alnus. Leg. E. Putzler 04.08.1959, det. E. Putzler.



Felix Schumm - CC BY-SA 4.0
[057], Österreich, Land Salzburg, Hohe Tauern, Krimmel, Weg am rechten Aachenufer bis zum Bahnhof, ca 1000 m, an Alnus. Leg. E. Putzler 04.08.1959, det. E. Putzler.



Felix Schumm - CC BY-SA 4.0
[057], Österreich, Land Salzburg, Hohe Tauern, Krimmel, Weg am rechten Aachenufer bis zum Bahnhof, ca 1000 m, an Alnus. Leg. E. Putzler 04.08.1959, det. E. Putzler.



Felix Schumm - CC BY-SA 4.0
[057], Österreich, Land Salzburg, Hohe Tauern, Krimmel, Weg am rechten Aachenufer bis zum Bahnhof, ca 1000 m, an Alnus. Leg. E. Putzler 04.08.1959, det. E. Putzler.



Felix Schumm - CC BY-SA 4.0
[057], Österreich, Land Salzburg, Hohe Tauern, Krimmel, Weg am rechten Aachenufer bis zum Bahnhof, ca 1000 m, an Alnus. Leg. E. Putzler 04.08.1959, det. E. Putzler.



Felix Schumm - CC BY-SA 4.0
[057], Österreich, Land Salzburg, Hohe Tauern, Krimmel, Weg am rechten Aachenufer bis zum Bahnhof, ca 1000 m, an Alnus. Leg. E. Putzler 04.08.1959, det. E. Putzler.



Felix Schumm - CC BY-SA 4.0
[057], Österreich, Land Salzburg, Hohe Tauern, Krimmel, Weg am rechten Aachenufer bis zum Bahnhof, ca 1000 m, an Alnus. Leg. E. Putzler 04.08.1959, det. E. Putzler.



Felix Schumm - CC BY-SA 4.0
[17937], Dominikanische Republik, Prov. La Vega, SE von Constanza am Weg nach Valle Noevo, nahe den Saltos de Aguas Blancas, 18.84852° N, 70.68464° W, 1590 m. Leg. F. Schumm & J.-P. Frahm 02.03.2012



Felix Schumm - CC BY-SA 4.0
[17937], Dominikanische Republik, Prov. La Vega, SE von Constanza am Weg nach Valle Noevo, nahe den Saltos de Aguas Blancas, 18.84852° N, 70.68464° W, 1590 m. Leg. F. Schumm & J.-P. Frahm 02.03.2012



Felix Schumm - CC BY-SA 4.0
[17937], Dominikanische Republik, Prov. La Vega, SE von Constanza am Weg nach Valle Noevo, nahe den Saltos de Aguas Blancas, 18.84852° N, 70.68464° W, 1590 m. Leg. F. Schumm & J.-P. Frahm 02.03.2012



Felix Schumm - CC BY-SA 4.0
[17937], Dominikanische Republik, Prov. La Vega, SE von Constanza am Weg nach Valle Noevo, nahe den Saltos de Aguas Blancas, 18.84852° N, 70.68464° W, 1590 m. Leg. F. Schumm & J.-P. Frahm 02.03.2012


Felix Schumm - CC BY-SA 4.0
[057], Österreich, Land Salzburg, Hohe Tauern, Krimmel, Weg am rechten Aachenufer bis zum Bahnhof, ca 1000 m, an Alnus. Leg. E. Putzler 04.08.1959, det. E. Putzler
at: atranorin, z: zeorin, 1: 6 - acetoxyhopane-16 ,22-diol, 2:16 -acetoxyhopane-6 ,22-diol, 3: leucotylin



P.L. Nimis CC BY-SA 04
TSB 5299



P.L. Nimis CC BY-SA 04
TSB 5299



P.L. Nimis CC BY-SA 04
TSB 9721



P.L. Nimis CC BY-SA 04
TSB 9721



Felix Schumm – CC BY-SA 4.0
Image from: F. Schumm (2008) - Flechten Madeiras, der Kanaren und Azoren. Beck, OHG - ISBN: 978-3-00-023700-3


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou


Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1080&lang=en
France, Forêt du Cranou



Felix Schumm - CC BY-SA 4.0
[ABL13658], Brazil, São Paulo, Botucatu, Botanical garden on campus. On bark in park. 22°53'09'' S, 48°29'56'' W, 850 m. Leg. M. Cáceres & A. Aptroot (no 13658), 13 Sept. 2012, det. A. Aptroot 2012.



Felix Schumm - CC BY-SA 4.0
[ABL13658], Brazil, São Paulo, Botucatu, Botanical garden on campus. On bark in park. 22°53'09'' S, 48°29'56'' W, 850 m. Leg. M. Cáceres & A. Aptroot (no 13658), 13 Sept. 2012, det. A. Aptroot 2012.



Felix Schumm - CC BY-SA 4.0
[ABL13658], Brazil, São Paulo, Botucatu, Botanical garden on campus. On bark in park. 22°53'09'' S, 48°29'56'' W, 850 m. Leg. M. Cáceres & A. Aptroot (no 13658), 13 Sept. 2012, det. A. Aptroot 2012.


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Friedergrieß


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Friedergrieß


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Friedergrieß


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Plansee



Felix Schumm - CC BY 4.0
[VZ1743], URSS. Caucasus Magnus, regio montis Elbrus, Verch, Baksan, in valle torrentis Adyrsu, 1900 m. Supra muscos ad saxa in ripa torrentis. Leg. A. Vezda, 25.6.1980. EX A. VEZDA LICHENES SELECTI EXSICCATI NR.1743.



Felix Schumm - CC BY 4.0
[VZ1743], URSS. Caucasus Magnus, regio montis Elbrus, Verch, Baksan, in valle torrentis Adyrsu, 1900 m. Supra muscos ad saxa in ripa torrentis. Leg. A. Vezda, 25.6.1980. EX A. VEZDA LICHENES SELECTI EXSICCATI NR.1743.


Triin Aimla; Owner: University of Tartu