Psorotichia schaereri (A. Massal.) Arnold

Psorotichia schaereri (A. Massal.) Arnold

Flora, 52: 265, 1869. Basionym: Pannaria schaereri A. Massal. - Ric. Auton. Lich. Crost.: 114, 1852.

Synonyms: Collema subbadium Nyl.; Collemopsis caesia Nyl.; Collemopsis schaereri (A. Massal.) Cromb.; Psorotichia caesia (Nyl.) Forssell; Pyrenopsis schaereri (A. Massal.) Nyl.; Trachyderma schaereri (A. Massal.) Trevis.

Distribution: N - VG, Ven (Schultz 2014), TAA, Lomb, Piem (Isocrono & al. 2004), Lig (Giordani & al. 2016). C - Tosc (Brackel 2015), Abr (Jatta 1909-1911). S - Camp (Nimis & Tretiach 2004, Garofalo & al. 2010), Pugl (Jatta 1909-1911), Si (Nimis & al. 1996b, Grillo 1998, Grillo & Caniglia 2004).

Description: Thallus crustose, areolate, homoiomerous, pseudoparenchymatous throughout, the hyphae 4-9 µm thick. Areoles irregularly shaped, 0.2-1 mm wide, c. 0.2-0.25 mm thick, contiguous, dull dark green to black, rarely pruinose, densely covered by isidia-like granules. Apothecia at first immersed then sessile, 1 or rarely 2 per areole, 0.25-0.5 mm across, with an initially punctiform, later expanded, reddish brown disc surrounded by a thick, granulose thalline margin. Proper exciple thin, 7.5-10(-15) µm wide, cupuliform, prosoplectenchymatous; epithecium orange-brown, 10-15 µm high; hymenium hyaline, (75-)90-110(-150) µm high, I+ blue; paraphyses branched and anastomosing, with cylindrical cells, 2-3 µm thick, only slightly constricted at septa; hypothecium colourless, up to 40 µm high. Asci 8-spored, cylindrical-clavate, with a rather thick, not amyloid wall, without apical amyloid thickenings, 65-80 x 14-23 µm. Ascospores 1-celled., hyaline, ellipsoid, (9-)15-20(-25) x 6-10 µm. Pycnidia immersed, globose to broadly pyriform, 50-90 µm across. Conidia broadly to narrowly ellipsoid, (2-)3-4 x 1-2 µm. Photobiont cyanobacterial, chroococcoid, of a few cells measuring 5-8(-10) x 5-7 µm, surrounded by a gelatinous sheath which is yellowish brown near the thallus surface. Spot tests: all negative. Chemistry: without lichen substances.

Note: on sunny seepage tracks of limestone, dolomite, calcareous sandstone and basic siliceous rocks, sometimes also on small pebbles and on walls, incl. those of mortar, from the lowlands to the subalpine belt.

Growth form: Crustose

Substrata: rocks

Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)

Reproductive strategy: mainly sexual

On otherwise dry surfaces with short periods of water seepage after rain

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: extremely rare

Montane belt: very rare

Submediterranean belt: rare

Padanian area: absent

Humid submediterranean belt: rather rare

Humid mediterranean belt: rare

Dry mediterranean belt: extremely 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

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

Herbarium: TSB (32362)
2001/12/10

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Felix Schumm – CC BY-SA 4.0

[16648], Germany, Rheinland-Pfalz, Burgruine Diemerstein bei Frankenstein, 49.444392° N, 7.962653° E, 275 m. Leg. Schumm 02.09. 2010 (BLAM-Exkursion). Det. Matthias Schultz 2010

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Psorotichia_schaereri.htm

France, 30/03/2018 - Lamothe-Landerron, alt. 32 m - Gironde - (33) - au pied des murs de l'église

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Psorotichia_schaereri.htm

France, 30/03/2018 - Lamothe-Landerron, alt. 32 m - Gironde - (33) - au pied des murs de l'église

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Psorotichia_schaereri.htm

France, 30/03/2018 - Lamothe-Landerron, alt. 32 m - Gironde - (33) - au pied des murs de l'église

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Psorotichia_schaereri.htm

France, 30/03/2018 - Lamothe-Landerron, alt. 32 m - Gironde - (33) - au pied des murs de l'église

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Psorotichia_schaereri.htm

France, 30/03/2018 - Lamothe-Landerron, alt. 32 m - Gironde - (33) - au pied des murs de l'église

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Psorotichia_schaereri.htm

France, 30/03/2018 - Lamothe-Landerron, alt. 32 m - Gironde - (33) - au pied des murs de l'église

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Psorotichia_schaereri.htm

France, 30/03/2018 - Lamothe-Landerron, alt. 32 m - Gironde - (33) - au pied des murs de l'église

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Psorotichia_schaereri.htm

France, 30/03/2018 - Lamothe-Landerron, alt. 32 m - Gironde - (33) - au pied des murs de l'église

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