ITALIC 7.0

Rhizocarpon lusitanicum (Nyl.) Arnold

Flora, 53: 478, 1871. Basionym: Lecidea lusitanica Nyl. - Flora, 47: 605, 1865.

Synonyms:

Distribution: C - Sar.

Description: Thallus crustose, areolate, parasitic in the thalli of Lepra-species, forming 1-3 mm wide, dull yellowish green patches on the thallus of the host (grey-white when young and edokapylic). Medulla white, I- or I+ very faintly blue. Areoles flat, 0.2-0.3 mm across. Apothecia lecideine, black, developing inbetween the areoles, 0.2-0.9(-1) mm across, superficial, adpressed, often confluent, with a convex, rugose disc, soon immarginate. Exciple poorly developed, of conglutinated, parallel hyphae; epithecium purple-brown-black, granulose, K+ intensely purple; hymenium colourless, c. 150 μm high, I+ blue; paraphysoids strongly conglutinate, richly branched and anastomosing, apically clavate; hypothecium dark reddish brown, K-. Asci 4-6(-8)-spored, clavate, fissitunicate, with a well-developed tholus, lacking an ocular chamber, Rhizocarpon-type. Ascospores 3-septate to submuriform, dark brown, with 5-9 cells in optical view, ellipsoid, 14-28 x 7-15 μm, distinctly halonate. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: cortex with rhizocarpic acid.

Note: a southern European species of siliceous rocks which starts the life-cycle on the thalli of Pertusaria-species below the montane belt; to be looked for in other parts of Tyrrhenian Italy.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

paras Pertusaria spp.

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: extremely rare

Humid mediterranean belt: very 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

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R/Rhizocarpon_lusitanicum.htm

France, 10/10/2014 - Pont de Muzille, Valle-di-Rostino - Corse - (20) - Sur thalle de Pertusaria

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R/Rhizocarpon_lusitanicum.htm

France, 10/10/2014 - Pont de Muzille, Valle-di-Rostino - Corse - (20) - Sur thalle de Pertusaria

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R/Rhizocarpon_lusitanicum.htm

France, 10/10/2014 - Pont de Muzille, Valle-di-Rostino - Corse - (20) - Sur thalle de Pertusaria

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R/Rhizocarpon_lusitanicum.htm

France, 10/10/2014 - Pont de Muzille, Valle-di-Rostino - Corse - (20) - Sur thalle de Pertusaria

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R/Rhizocarpon_lusitanicum.htm

France, 10/10/2014 - Pont de Muzille, Valle-di-Rostino - Corse - (20) - Sur thalle de Pertusaria

P.L. Nimis CC BY-SA 04

TSB 9716

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (9716)
2001/12/01

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (9716)
2001/12/01
on the host, Pertusaria sp.