ITALIC 8.0

Lepra graeca (Erichsen) Hafellner

in Hafellner & Türk, Stapfia, 104: 171, 2016. Basionym: Pertusaria graeca Erichsen. - Rabenh. Krypt.-Flora, 9, 5, 1: 624, 1936.

Synonyms: Pertusaria graeca Erichsen

Distribution: C - Sar.

Description: Thallus crustose, episubstratic, whitish grey, 1-2 mm thick, with an uneven to verrucose-papillate surface, without a distinct prothallus. Sterile warts papilliform, isidia-like, 0.5-1 mm thick and high, constricted at base, with a regularly round, somehow paler apical part; fertile warts larger, 1.5-3 mm wide, up to 1 mm high, convex, some of them bearing apothecia, some sometimes bearing soralia. Apothecia immersed at the top of fertile warts, often confluent, forming a round to irregularly shaped, 1-1.5 mm wide, reddish but white-pruinose disc surrounded by a slightly raised thalline margin. Epithecium almost colourless to pale grey; hymenium colourless, 270-480 µm high; paraphyses 1.5-2 µm thick richly branched and anastomosing; hypothecium colourless. Asci 1-spored, broadly cylindrical, the apex without a distinct ocular chamber, the outer sheath K/I+ blue, otherwise K/I–, with an inner extensible layer, Pertusaria-type. Ascospores 1-celled, hyaline, narrowly ellipsoid, 160-280 x 50-80 µm, the wall 5-9 µm thick, smooth. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; upper part of medulla and apothecial disc K+ brownish yellow, P+ yellow turning red. Chemistry: fumarprotocetraric acid, sometimes with variable amounts of succinprotocetraric or protocetraric acids.

Note: an eu-Mediterranean epiphytic species known from Corsica, Sardinia and Greece, much misunderstood in the past, whose ecology and distribution are very poorly known. It could prove to be just an epiphytic form of L. mammosa. The indicator values reflect the situation observed in Sardinia. It is included in the Italian red list of epiphytic lichens as “Data Deficient” (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: very 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

Index Fungorum GBIF

Erichsen C.F.E. 1936. Pertusariaceae. - In: Dr. L. Rabenhorsts Kryptogamenflora von Deutschland, Österreich und der Schweiz. Bd. IX, Abt. 5, T. 1. Akad. Verlagsges., Leipzig, pp. 321-512, 513-728. - Public Domain