Parmeliella testacea P.M. Jørg.

Parmeliella testacea P.M. Jørg.

Opera Bot., 45: 70, 1978.

Synonyms:

Distribution: N - Lomb, Lig. C - Tosc (Loppi & al. 2002c, Benesperi & al. 2007, Tretiach & al. 2008, Loppi & Nascimbene 2010), Umb (Ravera 1998, Ravera & al. 2006), Abr (Ravera & al. 2021), Sar (Zedda 2002). S - Camp (Nascimbene & al. 2010b, Garofalo & al. 2010, Ravera & Brunialti 2013), Cal (Puntillo 1996, Incerti & Nimis 2006).

Description: Thallus squamulose, heteromerous, 150-200 μm thick, chestnut brown to grey-brown, sorediate, forming 5-10 cm wide rosettes, rather loosely attached, rarely delimited by a blue-black prothallus. Squamules c. 2 x 2-3 mm, developing on a dark hypothallus, the marginal ones elongate, enlarged and somehow radiating, to 5 mm long. Soralia mainly marginal, convex, knob-like and resembling isidia, breaking down into blue-grey, granular soredia. Upper cortex fragile, paraplectenchymatous, 150-200 μm thick; medulla white. Apothecia rare, biatorine, 1-1.5 mm across, with a flat, red-brown disc and a rather thick, paler, persistent proper margin. Proper exciple pseudoparenchymatous; epithecium brownish; hymenium colourless, I+ persistently deep blue; paraphyses simple, not or slightly thickened at apices; hypothecium colourless. Asci 8-spored, subcylindrical to clavate, with a I+ blue tholus and an internal, more intensely I+ blue ring-structure. Ascospores 1-celled, hyaline, broadly ellipsoid, 16-20 x 9-10 μm, without an epispore. Photobiont cyanobacterial (Nostoc the cells in clusters). Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a mild-temperate lichen found on bark of ancient deciduous trees in mature forests, mostly in old plantations of Castanea; mainly Tyrrhenian in Italy, but also known from the Insubrian district. It is included in the Italian red list of epiphytic lichens under the “Least Concern” category (Nascimbene & al. 2013c).

Growth form: Squamulose

Substrata: bark

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

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

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: extremely rare

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: very rare

Humid mediterranean belt: extremely rare

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

P.L. Nimis CC BY-SA 04

TSB 9078

Pier Luigi Nimis - CC BY-SA 4.0

TSB 9078

Pier Luigi Nimis - CC BY-SA 4.0

TSB 9078

Pier Luigi Nimis - CC BY-SA 4.0

TSB 9078

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

Herbarium: TSB (9078)
2001/12/13

Pier Luigi Nimis - CC BY-SA 4.0

TSB 9078

Pier Luigi Nimis - CC BY-SA 4.0

TSB 9078

Pier Luigi Nimis - CC BY-SA 4.0

TSB 9078

Pier Luigi Nimis - CC BY-SA 4.0

TSB 9078

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Parmeliella_testacea.htm

France, 24/3/2014 - Miluccia : bocca di Feliciolu, - Corse

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Parmeliella_testacea.htm

France, 24/3/2014 - Miluccia : bocca di Feliciolu, - Corse

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Parmeliella_testacea.htm

France, 24/3/2014 - Miluccia : bocca di Feliciolu, - Corse

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Parmeliella_testacea.htm

France, 24/3/2014 - Miluccia : bocca di Feliciolu, - Corse

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_4/Parmeliella_testacea.htm

France, 24/3/2014 - Miluccia : bocca di Feliciolu, - Corse

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=356&lang=en

France, Forêt du Cranou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=356&lang=en

France, Forêt du Cranou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=356&lang=en

France, Forêt du Cranou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=356&lang=en

France, Forêt du Cranou

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=356&lang=en

France, Forêt du Cranou

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