ITALIC 7.0

Lepra trachythallina (Erichsen) Lendemer & R.C. Harris

Bryologist 120: 187, 2017.

Synonyms: Pertusaria laevigata (Nyl.) Arnold non (Th. Fr.) Anzi; Pertusaria trachythallina Erichsen; Variolaria trachythallina

Distribution: N - TAA (Nascimbene & al. 2022).

Description: Thallus crustose endosubstratic to thinly episubstratic, whitish to grey, continuous, smooth or uneven, not zoned. Apothecia lecanorine, immersed in soralia-like, 0.5-1(-2) mm wide thalline warts which are constricted at base and sometimes subglobose, 1-3 per wart, with a to 2 mm wide, pink, reddish or rarely finally black, granular, white-pruinose disc. Asci (1-)2-spored, the apex without a distinct ocular chamber, the outer sheath K/I+ blue, otherwise K/I–, with an inner extensible layer, Pertusaria-type. Ascospores often not well-developed, 1-celled, hyaline, ellipsoid, (38-)50-160 x 18-58 µm, the wall 5-7 µm thick. Photobiont chlorococcoid. Spot tests: thallus and/or medulla K+ yellow, C-, KC-, P+ yellow-orange. Chemistry: thamnolic acid.

Note: a cool-temperate, perhaps circumpolar lichen found on smooth bark of deciduous trees, especially Fagus, in humid montane forests. It is included as “Regionally Extinct” in the Italian red list of epiphytic lichens (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: very rare

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

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

Curtis Randall Björk CC BY-SA 4.0

New York, Lake Placid area, Heart Lake Photographed from specimen (Goward 82-38, UBC), on trunk Betula in open, Abies balsamea-Picea forest on ridge
1982-03-08

Curtis Randall Björk – CC BY-SA 4.0

New York, Lake Placid area, Heart Lake Date: 1982-03-08 Photographed from specimen (Goward 82-38, UBC), on trunk Betula in open, Abies balsamea-Picea forest on ridge