ITALIC 8.0

Bacidia caesiomarginata (Kernst.) Lettau

Hedwigia, 52(3-4): 133, 1912. Basionym: Bilimbia caesiomarginata Kernst. - Verh. Kaiserl.-Königl. zool.-bot. Ges. Wien, 44: 216, 1894.

Synonyms: Bilimbia subtrachona f. obtegens Arnold

Distribution:

Description: Thallus crustose, thinly episubstratic, finely small-verrucose to granulose, grey-white. Apothecia lecideine, usually abundant, dull black but often bluish-pruinose, 0.5-1.2 mm across, sessile and constricted at base, with an initially urceolate, then flat to finally strongly convex disc and an initially thick and raised, often bluish-pruinose, finally excluded proper margin. Proper exciple blue-black to brown in outer part, paler to colourless within, up to 70 µm wide laterally, of radially arranged, up to 2.5 µm thick hyphae; epithecium olive-brown or blue-green; hymenium colourless or pale brown, 50-60 µm high, hemiamyloid; paraphyses simple, up to 2 µm thick at mid-level, the apical cells capitate, up to 4 µm wide; hypothecium olive-brown in upper part, paler in lower part. Asci 8-spored, clavate to cylindrical-clavate, the apical dome K/I+ dark blue with a pale, conical-pointed apical cushion (axial mass), the wall I-, but the thin outer gel I+ blue, Bacidia-type, 40-50 x 9-12 µm. Ascospores (1-)3-septate, hyaline, cylindrical, 14-20 x 2.5-3 µm. Photobiont chlorococcoid, the cells 8-15 µm wide. Spot tests: thallus K-, C-, KC-, P-. Chemistry: unknown, but thallus probably without lichen substances.

Note: a rather poorly known species growing on more or less calciferous soil and terricolous mosses, more rarely on calciferous rocks in the alpine-subalpine belts, with several records from the Eastern Alps (Austria, Germany). To be looked for in the Italian Alps. The species might not belong to Bacidia in the strict sense.

Growth form: Crustose

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

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model

DOLICHENS

CC BY-NC 4.0 - Source: https://lichenportal.org/portal/taxa/index.php?taxon=133094 - Wisconsin State Herbarium, Lichens (WIS)

Catalog Nr.: WIS-L-0090056 Det.: A. Vĕzda - Leg.: K. Kalb Nr: 1014 Date: 1965-09-08 Locality: Austria, Tyrol, Ötztaler Alpen - Ötz Valley (Leiers Valley), above the Erlanger Hut above Umhusen, 2550 m, over mosses

CC BY-NC 4.0 - Source: https://lichenportal.org/portal/taxa/index.php?taxon=133094 - Wisconsin State Herbarium, Lichens (WIS)

Catalog Nr.: WIS-L-0090056 Det.: A. Vĕzda - Leg.: K. Kalb Nr: 1014 Date: 1965-09-08 Locality: Austria, Tyrol, Ötztaler Alpen - Ötz Valley (Leiers Valley), above the Erlanger Hut above Umhusen, 2550 m, over mosses

CC BY-NC 4.0 - Source: https://lichenportal.org/portal/taxa/index.php?taxon=133094 - Wisconsin State Herbarium, Lichens (WIS)

Catalog Nr.: WIS-L-0090056 Det.: A. Vĕzda - Leg.: K. Kalb Nr: 1014 Date: 1965-09-08 Locality: Austria, Tyrol, Ötztaler Alpen - Ötz Valley (Leiers Valley), above the Erlanger Hut above Umhusen, 2550 m, over mosses

Source: Vězda A. (1961) Acta Musei Silesiae Ser. A 10: 103-111 Systematische Studien uber die Flechtengattung Bacidia De Not. emend. Zahlbr.-I. Neue oder wenig bekannte Arten.

Source: Vězda A. (1961) Acta Musei Silesiae Ser. A 10: 103-111 Systematische Studien uber die Flechtengattung Bacidia De Not. emend. Zahlbr.-I. Neue oder wenig bekannte Arten.