ITALIC 8.0

Umbilicaria subpolyphylla Oxner

Flora Lischaĭnikiv Ukraïni, 2, 1: 497, 1968

Synonyms: Umbilicaria iberica Sancho & Krzew.

Distribution: S - Si (Christensen 2022).

Description: Thallus foliose-umbilicate, heteromerous, dorsiventral, monophyllous, up to 3(-5) cm wide attached by a central holdfast, the margins revolute, entire or somewhat lacerate. Upper surface dull, smooth to weakly wrinkled, grey-brown to dark brown, subumbonate in central part, slightly radially wrinkled, white areolate-scabrid and pruinose. Lower surface sooty black, sometimes with a paler marginal zone, or white-mottled, smooth, without rhizinomorphs, completely or patchily covered in dark brown, 3-5(-8)-celled, spherical to ellipsoid thalloconidia measuring (11.5-)13-21(-31) x (8.5)12-17(-24.5) μm. Upper cortex palisade-plectenchymatous; medulla white, one-layered, the plectenchyma scarcely branched, the hyphae loose, with many open intercellular spaces. Apothecia rather rare, sparse, black, sessile to substipitate, 0.7-1.5 mm across, actinodisc. Epithecium dark brown, up to 15 µm high; hymenium colourless, up to 75 µm high; paraphyses usually simple, up to 2.5 µm thick; hypothecium dark. Asci 8-spored, clavate, thick-walled, with an amyloid apical dome, Umbilicaria-type. Ascospores 1-celled, hyaline, ellipsoid, 11-13 x 6-7.5 µm. Pycnidia occasional to frequent, dark brown to black, 0.1-0.2 mm in diam. Conidia bacilliform, 3.5-5 x c. 1 µm. Photobiont chlorococcoid. Spot tests: medulla K-, C+ red, KC- or KC+ red, P-. Chemistry: medulla with gyrophoric and umbilicaric acids (major), and lecanoric acid (minor).

Note: a southern European species ranging from the Iberian Peninsula to Crimea, growing on siliceous rocks in sunny to rather shaded situations, from the montane to the oromediterranean belt. Some South Italian records of U. polyphylla may belong to this species (see Christensen 2022).

Growth form: Foliose, umbilicate

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by conidia and thalloconidia

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: very rare

Montane belt: very rare

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:

1

2

3

4

5

6

(info)

Predictive model

Index Fungorum GBIF

Antonio Valero; Owner: Antonio Valero

Spain
2010
as U. polyphylla

Antonio Valero; Owner: Antonio Valero

Spain
2010
as U. polyphylla

Antonio Valero; Owner: Antonio Valero

Spain
2010
as U. polyphylla

Antonio Valero; Owner: Antonio Valero

Spain
2010
as U. polyphylla

Giovanna Potenza

Italy, Basilicata, M. Volturino

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_U/Umbilicaria_subpolyphylla.htm

France, sur rocher siliceux - session AFL 2005 - Lozère