ITALIC 8.0

Ochrolechia dalmatica (Erichsen) Boqueras

in Boqueras & al., Cryptogamie, Mycol., 20: 313, 1999. Basionym: Pertusaria dalmatica Erichsen - Rabenh. Krypt.-Flora, 9, 5, 1: 540, 1936.

Synonyms:

Distribution: N - Emil (Boqueras & al. 1999, Fariselli & al. 2020). C - Sar. S - Camp (Brunialti & al. 2013, Ravera & Brunialti 2013).

Description: Thallus crustose. episubstratic, sorediate, continuous to usually areolate-verrucose or bullate-tuberculate, grey-white, grey or grey-brown. sometimes delimited by a whitish prothallus, the tubercles usually not separated from one another, large, irregular in shape, convex, rarely small and separated. Soralia circular to irregular, mostly arising at the tip of warts, with a more brown hue than the thallus, at first well-delimited and concave with a distinct, raised thalline rim, finally convex and sometimes confluent, bearing granular soredia. Apothecia extremely rare, lecanorine, up to 3 mm across, with a concave to flat, brown, faintly pruinose disc, a distinct parathecial ring and a thick, raised thalline margin. Thalline exciple corticate, the cortex well-differentiated, expanding at the base; proper exciple well-developed; epithecium pale brown, C+ red; hymenium colourless, up to c. 300 µm high; paraphyses thin, slender, densely branched and anastomosing; hypothecium pale yellowish brown. Asci 4-6-spored, with thick, amyloid walls, without recognizable apical structures, Pertusaria-like. Ascospores 1-celled, hyaline, ellipsoid, 50-69 x 25-35 µm. Photobiont chlorococcoid. Spot tests: thallus and apothecial margin K- C+ yellow, KC+ yellow, P-; thalline medulla C-; epithecium, soredia, and upper part of proper exciple C+ red. Chemistry: cortex with variolaric acid; epithecium, soredia, and upper part of proper exciple with gyrophoric acid (major) and lecanoric acid (minor).

Note: a poorly understood, rarely collected lichen, which badly deserves further study. Indicator values are tentative. It is included in the Italian red list of epiphytic lichens as “Data Deficient” (Nascimbene & al. 2013c). The record from Venezia Giulia reported by Nimis (1993: 510) was due to a misidentification.

Growth form: Crustose

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)

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: extremely rare

Padanian area: absent

Humid submediterranean belt: very rare

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

Herbarium samples

Index Fungorum GBIF

Harrie Sipman https://archive.bgbm.org/sipman/Zschackia/AegeanLichens/Ochrolechia.htm

Harrie Sipman

Greece
Source: https://archive.bgbm.org/sipman/Zschackia/AegeanLichens/Ochrolechia.htm