ITALIC 8.0

Biatoridium monasteriense J. Lahm ex Körb.

Parerga Lichenol.: 172, 1860.

Synonyms: Biatorella elegans (A. Massal.) Stizenb.; Biatorella monasteriensis (“J. Lahm”) J. Lahm; Biatoridium elegans (A. Massal.) Reinke; Biatoridium monasteriense Körb.; Chiliospora elegans A. Massal.

Distribution: N - Frl (Tretiach & Carvalho 1993), Ven (Nascimbene 2008, Nascimbene & al. 2008e), Emil (Nimis & al. 1996, Fariselli & al. 2020). C - Tosc (Tretiach & Carvalho 1993), Marc (Candotto & Tretiach 2013), Umb (Ravera & al. 2006, 2006b), Laz (Munzi & al. 2007), Mol (Nimis & Tretiach 1999, Caporale & al. 2008), Sar (Rizzi & al. 2011, Di Nuzzo & al. 2022). S - Pugl (Nimis & Tretiach 1999), Si (Ravera & al. 2023b).

Description: Thallus crustose, episubstratic, pale grey-green when dry, becoming bright green when wet, effuse, continuous or minutely areolate, usually granular, poorly delimited, without a distinct prothallus. Apothecia biatorine, 0.2-0.5 µm across, partly immersed to sessile, yellowish, pale pink or pale dull red-brown, translucent and almost colourless when wet, with an initially flat but soon convex disc and a distinct, paler, thin, finally excluded proper margin. Proper exciple 15-25 μm thick, of structura globulosa, the hyphae hyaline and thin-walled, I-; epithecium pale red-brown; hymenium colourless or pale yellow, 60-85 μm high, I+ blue; paraphyses separating and clearly visible in K, mostly simple, c. 1.5 μm thick at base, the apical cells 4-6 μm wide; hypothecium colourless or pale yellowish brown, of intricately interwoven hyphae, (25-)40-85 μm high, I+ parchily blue. Asci 100-150(-200)-spored, narrowly clavate, thick-walled, especially at apex, with a layered apical K/I+ blue dome and a K/I+ intensely blue inner cap, the outer wall I+ pale blue, Biatoridium-type (Hafellner 1994). Ascospores 1-celled, hyaline, globose, 3-3.5 μm. Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: a mild-temperate lichen found on deciduous trees with subacid (e.g. Quercus) to base-rich (Acer, Fraxinus, Sambucus) bark; much overlooked in the past, but locally not uncommon, especially in humid situations, e.g. along brooks.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than 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: very rare

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: 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

Index Fungorum GBIF

P.L. Nimis CC BY-SA 4.0

TSB 16582

P.L. Nimis - CC BY-SA 04

TSB 4214

P.L. Nimis - CC BY-SA 04

TSB 4214

P.L. Nimis - CC BY-SA 04

TSB 4219

P.L. Nimis - CC BY-SA 04

TSB 4219