Ramonia subsphaeroides (Tav.) Vězda

Ramonia subsphaeroides (Tav.) Vězda

Folia Geobot. Phytotaxon., 1: 165, 1966. Basionym: Gyalecta subsphaeroides Tav. - Portugaliae Acta Biol., B, 3: 59, 1950.

Synonyms:

Distribution: C - Umb (Ravera & al. 2016), Laz (Nascimbene & Ravera 2014).

Description: Thallus crustose, endosubstratic or thinly episubstratic, pale grey-green, continuous to cracked, very thin, often poorly evident. Apothecia 0.2-0.4 mm across, at first immersed in the thallus and almost perithecioid, later adnate and urceolate, with a finally expanded, concave, pinkish to brownish disc, and a thick, prominent, sometimes crenulate, whitish or yellowish white proper margin. Proper exciple well developed laterally, the outer part of small, thin-walled, angular cells, the inner part with rectangular cells ending in periphysoids; hymenium colourless, I+ blue at least in upper part; paraphyses slender, simple, slightly swollen at apex; hypothecium colourless. Asci 8-spored, cylindrical-clavate, with a single, thin, K/I- wall layer, and an amyloid exoascus without a ring structure. Ascospores 8-10-septate, hyaline, acicular, (45-)50-60 x 4-5 µm, surrounded by a gelatinous halo. Photobiont trentepohlioid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a Mediterranean-Atlantic epiphytic species, mostly found on Quercus in shaded and humid stands, known from a few localities only. The species likely belongs to Karstenia (see Cannon & al. 2024).

Growth form: Crustose

Substrata: bark

Photobiont: Trentepohlia

Reproductive strategy: mainly sexual

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: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: extremely rare

Humid mediterranean belt: extremely 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

Felix Schumm; Owner: CC BY-SA 4.0

[TSB 40943], Italy, Lazio, Prov. Roma, San Vittorino, on Quercus ilex, 170 m. Leg. et det. S. Ravera, 11.03.2014 (ex IS)

Felix Schumm; Owner: CC BY-SA 4.0

[TSB 40943], Italy, Lazio, Prov. Roma, San Vittorino, on Quercus ilex, 170 m. Leg. et det. S. Ravera, 11.03.2014 (ex IS)

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

Herbarium: TSB (16187)
2002/05/13

Felix Schumm - CC BY-SA 4.0

[TSB 40943], Italy, Lazio, Prov. Roma, San Vittorino, on Quercus ilex, 170 m. Leg. et det. S. Ravera, 11.03.2014 (ex IS)

Felix Schumm - CC BY-SA 4.0

[TSB 40943], Italy, Lazio, Prov. Roma, San Vittorino, on Quercus ilex, 170 m. Leg. et det. S. Ravera, 11.03.2014 (ex IS)

Felix Schumm - CC BY-SA 4.0

[TSB 40943], Italy, Lazio, Prov. Roma, San Vittorino, on Quercus ilex, 170 m. Leg. et det. S. Ravera, 11.03.2014 (ex IS)

Felix Schumm - CC BY-SA 4.0

[TSB 40943], Italy, Lazio, Prov. Roma, San Vittorino, on Quercus ilex, 170 m. Leg. et det. S. Ravera, 11.03.2014 (ex IS)

Felix Schumm - CC BY-SA 4.0

[TSB 40943], Italy, Lazio, Prov. Roma, San Vittorino, on Quercus ilex, 170 m. Leg. et det. S. Ravera, 11.03.2014 (ex IS)

Felix Schumm - CC BY-SA 4.0

[TSB 40943], Italy, Lazio, Prov. Roma, San Vittorino, on Quercus ilex, 170 m. Leg. et det. S. Ravera, 11.03.2014 (ex IS)

Felix Schumm - CC BY-SA 4.0

[TSB 40943], Italy, Lazio, Prov. Roma, San Vittorino, on Quercus ilex, 170 m. Leg. et det. S. Ravera, 11.03.2014 (ex IS)

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Ramonia_subsphaeroides.htm

France, livier et Danièle Gonnet - 5/10/2019 - Bocognano, alt. 618 m - Corse - (20) - sur le rhytidome des vieux Quercus ilex

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Ramonia_subsphaeroides.htm

France, livier et Danièle Gonnet - 5/10/2019 - Bocognano, alt. 618 m - Corse - (20) - sur le rhytidome des vieux Quercus ilex

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Ramonia_subsphaeroides.htm

France, livier et Danièle Gonnet - 5/10/2019 - Bocognano, alt. 618 m - Corse - (20) - sur le rhytidome des vieux Quercus ilex

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Ramonia_subsphaeroides.htm

France, livier et Danièle Gonnet - 5/10/2019 - Bocognano, alt. 618 m - Corse - (20) - sur le rhytidome des vieux Quercus ilex

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Ramonia_subsphaeroides.htm

France, livier et Danièle Gonnet - 5/10/2019 - Bocognano, alt. 618 m - Corse - (20) - sur le rhytidome des vieux Quercus ilex

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Ramonia_subsphaeroides.htm

France, livier et Danièle Gonnet - 5/10/2019 - Bocognano, alt. 618 m - Corse - (20) - sur le rhytidome des vieux Quercus ilex

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Ramonia_subsphaeroides.htm

France, livier et Danièle Gonnet - 5/10/2019 - Bocognano, alt. 618 m - Corse - (20) - sur le rhytidome des vieux Quercus ilex

Source: Frisch, A., Klepsland, J., Palice, Z., Bendiksby, M., Tønsberg, T. & Holien, H. 2020. New and noteworthy lichens and lichenicolous fungi from Norway. Graphis Scripta 32 (1): 1–47. Oslo. ISSN 2002-4495. - CC BY-4.0

Ramonia subsphaeroides (O-L-221293). a. Exciple, b. Ascospores in KOH, c. Ascospore in water, d. Apothecium (TRH-L-18900). Scales = a 50 μm, b 10 μm, c 7.5 μm, d 0.2 mm. Photos: J. Klepsland (a–c), A. Frisch (d).

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