ITALIC 7.0

Umbilicaria meizospora (Harm.) E.A. Davydov & D. Masson

Lichenologist, 54: 3, 2022. Basionym: Umbilicaria hirsuta var. meizospora Harm. - Lich. Fr., 4: 697, 1910 (1909)

Synonyms: Gyrophora hirsuta var. meizospora (Harm.) H. Olivier; Gyrophoropsis meizospora (Harm.) M. Choisy; Umbilicaria crustulosa subsp. crustulosa var. badiofusca Frey

Distribution: N - Lomb, Piem (Isocrono & al. 2004), VA (Borlandelli & al. 1996, Piervittori & Isocrono 1997, 1999).

Description: Thallus foliose-umbilicate, dorsiventral, monophyllous, sometimes deeply dissected and appearing polyphyllous, orbicular in outline, 3-5(-10) cm wide, rarely wider. Upper surface grey with a violet hue, darker towards the margins, dull, even or slightly radially wrinkled and distinctly areolate around the umbilicus, scabrous and rimose at margin, which are often down-turned, and sometimes deeply incised. Lower surface brown-black to black, smooth to slightly areolate towards the margins, with numerous elongate to wart-like, dark rhizinomorphs, which usually lack around the umbilicus; thalloconidia absent. Upper cortex c. 30 µm thick; medulla white; lower cortex c. 40 µm thick. Apothecia common, omphalodisc, sessile to depressed, black, to 4(-5) mm across, with a central sterile button, occasionally appearing subgyrose. Epithecium and hypothecium brown; hymenium colourless. Asci 8-spored, clavate, thick-walled, with an amyloid apical dome, Umbilicaria-type. Ascospores first simple and hyaline, then muriform and brown 18-22 x 13-17 µm. Pycnidia numerous in marginal zone of upper surface, immersed, bottled-shaped, with a dark brown wall and a black ostiole. Conidia bacilliform, c. 3-4 x 0.8-1 µm. Photobiont chlorococcoid. Spot tests: K-, C+ red, KC+ red, P-. Chemistry: medulla with gyrophoric acid, and small amounts of lecanoric and hiascic acids.

Note: a species of the mountains of Southern Europe; for further details see Davydov & Masson (2022).

Growth form: Foliose, umbilicate

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: rare

Subalpine belt: rather rare

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

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:

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6

(info)

Predictive model

Index Fungorum GBIF

Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.