ITALIC 8.0

Chaenotheca subroscida (Eitner) Zahlbr.

Cat. Lich. Univ., 1: 578, 1922. Basionym: Cyphelium subroscidum Eitner - Jahrb. schles. Ges. vaterl. Kultur, 88: 53, 1911.

Synonyms:

Distribution: N - Ven (Nascimbene 2011), TAA (Nascimbene & al. 2010, 2014, 2922, Nascimbene 2014, Nascimbene & Marini 2015, Trindade & al. 2021).

Description: Thallus crustose, thinly episubstratic, finely granulose to patchily flat-verrucose in older parts, appearing almost sorediate, pale grey (the verrucose parts pale brown), the granules 0.05-0.1 mm wide. Apothecia stalked, pin-like, (0.6-)0.8-1.3(-1.6) mm high, the stalk slender, (0.04-)0.06-0.08 mm thick, black in lower part, densely covered in a greenish yellow pruina in upper part, consisting of periclinally arranged, medium brown hyphae. Capitulum lenticular, 0.2-0.3(-0.4) mm across, yellow-pruinose on lower side, with a well-developed, brown mazaedium. Exciple well-developed, of periclinally arranged, sclerotized, brown hyphae; hypothecium medium brown, with a convex upper surface. Asci cylindrical, distinctly stipitate, formed from hooked ascogenous hyphae which mostly carry 2-3 asci each, dissolving early, with 1-seriately arranged spores. Ascospores 1-celled, brown to pale brown, globose, (4.5-)5-7(-8.5) µm wide, the wall with irregular cracks delimiting polygonal areas. Photobiont chlorococcoid, with globose cells. Spot tests: thallus K-, C-, KC-, P-. Chemistry: thallus without lichen substances or with pseudoplacodiolic acid; yellow pruina on the ascocarps consisting of vulpinic acid.

Note: a rare species growing on the trunks of old conifers, more rarely on Betula, in upland areas, reported from the Eastern Alps. It is included in the Italian red list of epiphytic lichens as “Data Deficient” (Nascimbene & al. 2013c).

Growth form: Crustose

Substrata: bark and lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: very rare

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

Author: Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php

Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/

Courtesy: Anita Stridvall

Leif Stridvall - Source: http://www.stridvall.se/lichens/gallery/

Courtesy: Anita Stridvall