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.
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.
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
Montane belt: very rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: rare
Padanian area: absent

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Rarity

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Predictive map

Felix Schumm - CC BY-SA 4.0
[VZR101], Hibernia. Westerness, ad septentriones a Loch Sunart, 4-5 km ad occid. a Strontian ad merid. a Woodland, 5-40 m. Ad corticem arborum. Leg. B. Coppins, P. James & J. Poelt. EX A. VEZDA: LICHENES RARIORES EXSICCATI NR. 101.


P.L. Nimis - CC BY-SA 04
TSB 4214


P.L. Nimis - CC BY-SA 04
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P.L. Nimis - CC BY-SA 04
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P.L. Nimis - CC BY-SA 04
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P.L. Nimis CC BY-SA 4.0
TSB 16582


Felix Schumm - CC BY-SA 4.0
[VZR101], Hibernia. Westerness, ad septentriones a Loch Sunart, 4-5 km ad occid. a Strontian ad merid. a Woodland, 5-40 m. Ad corticem arborum. Leg. B. Coppins, P. James & J. Poelt. EX A. VEZDA: LICHENES RARIORES EXSICCATI NR. 101.