Ochrolechia parella (L.) A. Massal.

Ric. Auton. Lich. Crost.: 30, 1852. Basionym: Lichen parellus L. - Mantissa Pl.: 132, 1767.
Synonyms: Gasparrinia pallescens var. parella (L.) Tornab.; Lecanora parella (L.) Ach.; Ochrolechia euganea Sambo?; Ochrolechia madeirensis Verseghy; Ochrolechia pallescens var. parella (L.) Körb.; Ochrolechia parella f. angulosa Verseghy; Ochrolechia parella f. striata Verseghy; Ochrolechia parella f. tenuis Verseghy; Ochrolechia parella var. albissima Zschacke; Ochrolechia parella var. immersa Szatala; Ochrolechia parella var. kretaeensis Verseghy; Parmelia parella (L.) Ach.; Pertusaria incarnata Leight.
Distribution: N - VG, Ven, TAA, Lomb, VA (Piervittori & Isocrono 1999), Emil (Tretiach & al. 2008, Fariselli & al. 2020), Lig (Brunialti & al. 1999). C - Tosc (Adamo & al. 1993, Tretiach & Nimis 1994, Adamo 1997, Pišút 1997, Putortì & Loppi 1999b, Benesperi 2006, 2011), Marc, Umb (Panfili 2000b, Ravera & al. 2006), Laz (Genovesi & al. 2011, Roccardi & al. 2014), Abr, Mol (Garofalo & al. 1999, Caporale & al. 2008, Nimis & Tretiach 1999), Sar (Kerstin & al. 1994, Nöske 2000, Kukwa 2011, Rizzi & al. 2011, Giordani & al. 2013, Cossu & al. 2015, Brackel & Berger 2019). S - Camp (Garofalo & al. 1999, Ricciardi & al. 2000, Aprile & al. 2002, Nimis & Tretiach 2004, Catalano & al. 2016), Pugl, Bas, Cal (Puntillo 1996), Si (Nimis & al. 1994, Ottonello & Salone 1994, Ottonello & al. 1994, 2011, Grillo & al. 1996, 1996b, Ottonello & Romano 1997, Grillo & Caniglia 2004, Brackel 2008b, Kukwa 2011).
Description: Thallus crustose, epilithic, rather thick (0.5-2 mm), smooth to wrinkled or cracked-areolate, dull, whitish, ochre-grey or very pale brown, forming patches to 30 cm across. Apothecia lecanorine, round to (more rarely) irregular, 2-6 mm across, with a first concave, then flat, pink-ochre, finely white-pruinose disc, and a very thick, smooth, prominent thalline margin. Cortex of the thalline margin well developed, in upper part up to 70 μm, with a well differentiated medulla; proper exciple well visible in section, superficially often forming a ring around the disc; epithecium pale brown, granular, the granules dissolving in K; hymenium colourless; paraphyses thin, densely branched and anastomosed; hypothecium colourless to yellowish. Asci (4-)6-8-spored with thick, amyloid walls, Pertusaria-type. Ascospores 1-celled, hyaline, broadly ellipsoid, 45-70(-85) x (12-)25-40(-50) µm. Photobiont: chlorococcoid. Thallus: K-, C- or C+ yellow, KC+ yellow, P-; disc of apothecia K-, C+ red, KC+ carmine red, P-. Chemistry: gyrophoric acid in the epithecium, variolaric acid in thallus, often with the murolic acid complex.
Note: closely related to O. pallescens, but silicicolous and much more common, especially in Tyrrhenian Italy, where it is locally very abundant. See also note on O. pallescens.
Growth form: Crustose
Substrata: rocks
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: very rare
Submediterranean belt: very rare
Padanian area: extremely rare
Humid submediterranean belt: very common
Humid mediterranean belt: common
Dry mediterranean belt: very rare

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


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



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11800)
2001/11/27


Caterina Azara; Owner: Caterina Azara
Italy, Sardegna, Capo Sandalo, Isola di S. Pietro
2010


Caterina Azara; Owner: Caterina Azara
Italy, Sardegna, Capo Sandalo, Isola di S. Pietro
2010


Manilio Prignano; Owner: Manilio Prignano
Italia, Toscana, Selva di Malano
2010


Manilio Prignano; Owner: Manilio Prignano
Italy, Sicilia, Isola di Salina
2010


Manilio Prignano; Owner: Manilio Prignano
Italy, Sicilia, Isola di Salina
2010


Manilio Prignano; Owner: Manilio Prignano
Italy, Sicilia, Isola di Salina
2010


Manilio Prignano; Owner: Manilio Prignano
Italy, Sicilia, Isola di Salina
2010


Manilio Prignano; Owner: Manilio Prignano
Italy, Sicilia, Isola di Salina
2010


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Toscana, Colline del Chianti
2010


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Toscana, Colline del Chianti
2010


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Sicilia, Agrigento, Bugheber, Pantelleria
2010


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Sicilia, Agrigento, Bugheber, Pantelleria
2010


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Sicilia, Agrigento, Bugheber, Pantelleria
2010


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Toscana
2010



Andrea Moro; Owner: Department of Life Sciences, University of Trieste
Italy, Lazio, Roma, Ruines of ancient Tusculum, above Frascati
18/03/2017



Andrea Moro; Owner: Department of Life Sciences, University of Trieste
Italy, Lazio, Roma, Ruines of ancient Tusculum, above Frascati
18/03/2017



Domenico Puntillo; Owner: Domenico Puntillo
Italy



Felix Schumm – CC BY-SA 4.0
[1879], Frankreich, Bretagne, Pointe de Saint Mathieu, westlich von Brest, auf Feldmäuerchen aus Urgestein. Leg. F. Schumm & Claude Comte, 22.08.1971
Unusual form



Felix Schumm – CC BY-SA 4.0
[1879], Frankreich, Bretagne, Pointe de Saint Mathieu, westlich von Brest, auf Feldmäuerchen aus Urgestein. Leg. F. Schumm & Claude Comte, 22.08.1971
Unusual form



Felix Schumm – CC BY-SA 4.0
[1879], Frankreich, Bretagne, Pointe de Saint Mathieu, westlich von Brest, auf Feldmäuerchen aus Urgestein. Leg. F. Schumm & Claude Comte, 22.08.1971
Unusual form



Felix Schumm – CC BY-SA 4.0
[1879], Frankreich, Bretagne, Pointe de Saint Mathieu, westlich von Brest, auf Feldmäuerchen aus Urgestein. Leg. F. Schumm & Claude Comte, 22.08.1971
Unusual form



Felix Schumm – CC BY-SA 4.0
[1879], Frankreich, Bretagne, Pointe de Saint Mathieu, westlich von Brest, auf Feldmäuerchen aus Urgestein. Leg. F. Schumm & Claude Comte, 22.08.1971
Unusual form



Felix Schumm – CC BY-SA 4.0
[1879], Frankreich, Bretagne, Pointe de Saint Mathieu, westlich von Brest, auf Feldmäuerchen aus Urgestein. Leg. F. Schumm & Claude Comte, 22.08.1971
Unusual form



Felix Schumm – CC BY-SA 4.0
[1879], Frankreich, Bretagne, Pointe de Saint Mathieu, westlich von Brest, auf Feldmäuerchen aus Urgestein. Leg. F. Schumm & Claude Comte, 22.08.1971
Unusual form



Felix Schumm – CC BY-SA 4.0
[1879], Frankreich, Bretagne, Pointe de Saint Mathieu, westlich von Brest, auf Feldmäuerchen aus Urgestein. Leg. F. Schumm & Claude Comte, 22.08.1971
Unusual form


Nere Sorrentino
Spain


Nere Sorrentino
Spain


Nere Sorrentino
Spain


Nere Sorrentino
Spain


Nere Sorrentino
Spain



P.L. Nimis CC BY-SA 04
TSB 15389



P.L. Nimis CC BY-SA 04
TSB 37034



P.L. Nimis CC BY-SA 04
TSB 37034