ITALIC 8.0

Athallia raesaenenii (Bredkina) ined.

provisionally placed here, ICN Art. 36.1b. Basionym: Caloplaca raesaenenii Bredkina - Nov. sist. Niz. Rast., 23: 170, 1986.

Synonyms: Caloplaca geophila Räsänen nom. illegit.; Caloplaca raesaenenii Bredkina; Caloplaca thuringiaca Søchting & Stordeur

Distribution: N - TAA (Stordeur 2003).

Description: Thallus crustose, endosubstratic or thinly episubstratic, of very small, dispersed, greenish grey areoles that may coalesce into a more or less continuous, irregular crust. Apothecia zeorine to biatorine, at first slightly immersed, then sessile, 0.2-0.6 mm across, with an initially concave, then flat, orange disc, a thin, often slightly paler proper margin, and a poorly developed, grey thalline margin often present only on the underside of the apothecia. Proper exciple prosoplectenchymatous, 35-40 μm wide; epithecium brownish orange, finely granular, K+ purple-red, C-; hymenium colourless, 45-60 µm high; paraphyses simple or rarely slightly branched in upper part, 1-1.5 µm thick at mid-level, the apical cells swollen, 4-5.5 µm wide; hypothecium colourless, without oil droplets, often subtended by an algal layer. Asci 8-spored, clavate, functionally unitunicate, apically thickened with a broad internal beak, the inner part of apex and external cap I+ blue, Teloschistes-type. Ascospores 2-celled, polarilocular, hyaline, ellipsoid, 10-13 x 6-6.5 µm, the equatorial thickening (“septum”) 3-4.5 µm, c. 1/3 of spore length. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-; apothecia K+ purple-red, C-. Chemistry: thallus without lichen substances; apothecia with parietin (major), teloschistin, fallacinal, parietinic acid, and emodin (minor).

Note: a submediterranean-Turanic to west-Pontic species described from Germany. The Italian record is from gypsum soil and plant debris (especially at the base of Artemisia annua-stems) in a rather dry area, but the species also occurs on tree bark. The species was provisionally recombined into Athallia by Roux. For further details see Vondrák & al. (2009, 2016).

Growth form: Crustose

Substrata: bark, soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)

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: 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

Jan Vondrak https://botanika.prf.jcu.cz/lichenology/index.php?pg=8&cat=32&idx=9106

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder

On decayed plant debris. Central Europe; Germany: Rheinland-Pfalz. (Coll/ident. F. Richter).

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder

On decayed plant debris. Central Europe; Germany: Rheinland-Pfalz. (Coll/ident. F. Richter).