ITALIC 8.0

Cetrelia olivetorum (Nyl.) W.L. Culb. & C.F. Culb.

Contr. U.S. Nat. Herb., 34: 515, 1968. Basionym: Parmelia olivetorum Nyl. - Not. Sällsk. Fauna Fl. Fenn. Förh., n. ser., 5: 180, 1866.

Synonyms: Parmelia cetrarioides var. rubescens (Th. Fr.) Du Rietz; Parmelia olivaria f. subvenosa Gyeln.; Parmelia rubescens (Th. Fr.) Vain.; Pseudoparmelia aradensis Gyeln.

Distribution: N - VG (Carvalho 1997), Frl (Tretiach & Molaro 2007), Ven (Nascimbene & Caniglia 1997, 2002, 2003c, Lazzarin 1997, Caniglia & al. 1999, Nascimbene 2005c, 2008c, 2011, Nascimbene & al. 2005b, 2006c, 2007, 2009c, 2010b, 2013b, Thor & Nascimbene 2007, Brackel 2013), TAA (Nascimbene & Caniglia 2000b, Nascimbene 2005b, 2006b, 2008b, Stofer 2006, Nascimbene & al. 2007b, 2022, Lang 2009, Nimis & al. 2015), Lomb, Piem (Griselli & al. 2003, Isocrono & al. 2004), Emil (Fariselli & al. 2020), Lig (Putortì & al. 1999b, Giordani & Brunialti 2000, Brunialti & al. 2001). C - Tosc (Brackel 2015), Abr (Recchia & Villa 1996, Stofer 2006, Gheza & al. 2021). S - Pugl (Nimis & Tretiach 1999), Si (Grillo & Caniglia 2004, 2006).

Description: Thallus foliose, heteromerous, dorsiventral, broad-lobed, loosely attached, forming wide-spreading, usually orbicular 6-20(-40) cm wide rosettes. Lobes broad and rotund, (0.5-)1-1.5(-2) cm wide, with raised, wavy margins, greenish grey (sometimes tinged brown), with punctiform pseudocyphellae on upper surface, which are rather small and usually not raised, often concentrated in the submarginal parts of lobes; pseudocyphellae on the lower surface not developed, or appearing as very small white dots. Soralia primarily marginal, elongated, usually smooth, with fine to rather coarse soredia. Lower surface black, rather regularly ridged, with scattered, simple, black rhizines and a brown, rhizine-free zone along the margin. Upper and lower cortices prosoplectenchymatous, the upper one with a non-pored epicortex, of densely agglutinated hyphae with tiny lumina; medulla white, with isolichenan, I-. Apothecia very rare, lecanorine. Asci 8-spored, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 12-15 x 7-10 µm. Pycnidia unknown. Photobiont chlorococcoid. Spot tests: cortex K+ (weakly) yellow, C-, KC-, P-; medulla and soralia K+ yellow, C+ strongly blood-red, KC+ reddish, P-, UV-. Chemistry: cortex with atranorin and chloroatranorin (in lower amounts than in soralia); soralia (and medulla) with atranorin, olivetoric acid, anziaic acid, and 4-O-demethylmicrophyllinic acid, sometimes with a fatty acid.

Note: a species with the olivetoric acid syndrome, found on bark of broad-leaved trees and on epiphytic, more rarely silicicolous mosses in humid, old forests, locally still locally abundant in montane Abies-Fagus forests, especially in the Eastern Alps. Here the species, which is certainly widespread in Italy, is still treated in a broad sense: several records before 2007 could refer to the other species of the complex. The species was included in the Italian red list of epiphytic lichens as “Near-threatened” (Nascimbene & al. 2013c).

Growth form: Foliose, broad lobed

Substrata: bark

Photobiont: green algae other than Trentepohlia

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: very 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:

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

Index Fungorum GBIF

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

Herbarium: TSB (29405)
2001/12/09
soralia

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

Herbarium: TSB (29405)
2001/12/09

Andrea Moro; Owner: Department of Life Sciences, University of Trieste

Italia, Friuli-Venezia Giulia, UD, Comune di Sauris, Bosco della Stua presso il Lago
2008.26.08

Juri Nascimbene; Owner: Department of Life Sciences, University of Trieste

Italy, Trentino-Alto Adige, Trento, Villa Welsperg, Centro Visitatori del Parco di Paneveggio; altitude: 1030 m
03.04.2009