Rhizocarpon tavaresii Räsänen
Arch. Soc. Zool.-Bot. Fenn. Vanamo, 3: 85, 1949.
Synonyms: Diplotomma geographicum f. tenellum (Müll. Arg.) Jatta?; Rhizocarpon geographicum f. tenellum Müll. Arg.?
Description: Thallus crustose, episubstratic, areolate, bright yellow-green, dull, forming 1-5 cm wide patches delimited by a thin dark prothallus, the areoles contiguous, angular, (0.1-)0.3-0.6 mm wide, often subdivided into smaller units by cracks, mostly flat, sometimes forming a crescent-shaped collar around the apothecia. Cortex c. 35 μm thick; medulla white, I+ blue. Apothecia lecideine, black, developing between the areoles, 0.2-0.6(-0.7) mm across, angular, with a slightly concave to flat disc and a thin proper margin. Proper exciple brown and K+ brownish red in outer part, paler within; epithecium greenish, poorly delimited against the hymenium, K+ intensifying green or purple-red; hymenium greenish, (65-)120-160 μm high; paraphysoids strongly coherent, richly branched and anastomosing, the apical cells clavate; hypothecium brown, 50-100 μm high, K-. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus that is K/I- in lower part and K/I+ blue near the apex, lacking an ocular chamber, Rhizocarpon-type. Ascospores muriform, with 15-20 cells visible in optical view, dark brown, oblong-ellipsoid, (25-)28-40 x (13-)16-20(-22) μm. Photobiont chlorococcoid. Spot tests: medulla K-, C-, KC-, P+ orange-red or P+ yellow. Chemistry: cortex with rhizocarpic acid, medulla with stictic or psoromic acids.
Growth form: Crustose
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: absent
Subalpine belt: absent
Montane belt: absent
Dry submediterranean belt: absent
Humid submediterranean belt: rather rare
Padanian area: absent
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
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Occurrence data
Predictive map
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome,loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome,800 m. Ad saxa basaltica. Leg. A. Vezda, 08.02.1994. EX A.VEZDA: LICHENES RARIORES EXSICCATI NR. 69.
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome,loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome,800 m. Ad saxa basaltica. Leg. A. Vezda, 08.02.1994. EX A.VEZDA: LICHENES RARIORES EXSICCATI NR. 69.
Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (18195)
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome,
loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome,
800 m. Ad saxa basaltica. Leg. A. V zda, 08.02.1994. EX A.
V ZDA: LICHENES RARIORES EXSICCATI NR. 69.
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome,
loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome,
800 m. Ad saxa basaltica. Leg. A. V zda, 08.02.1994. EX A.
V ZDA: LICHENES RARIORES EXSICCATI NR. 69.
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome,
loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome,
800 m. Ad saxa basaltica. Leg. A. V zda, 08.02.1994. EX A.
V ZDA: LICHENES RARIORES EXSICCATI NR. 69.
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome,
loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome,
800 m. Ad saxa basaltica. Leg. A. V zda, 08.02.1994. EX A.
V ZDA: LICHENES RARIORES EXSICCATI NR. 69.
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome,
loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome,
800 m. Ad saxa basaltica. Leg. A. V zda, 08.02.1994. EX A.
V ZDA: LICHENES RARIORES EXSICCATI NR. 69.
Growth form: Crustose
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: absent
Subalpine belt: absent
Montane belt: absent
Dry submediterranean belt: absent
Humid submediterranean belt: rather rare
Padanian area: absent
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome,loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome,800 m. Ad saxa basaltica. Leg. A. Vezda, 08.02.1994. EX A.VEZDA: LICHENES RARIORES EXSICCATI NR. 69.
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome,loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome,800 m. Ad saxa basaltica. Leg. A. Vezda, 08.02.1994. EX A.VEZDA: LICHENES RARIORES EXSICCATI NR. 69.
Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (18195)
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome, loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome, 800 m. Ad saxa basaltica. Leg. A. V zda, 08.02.1994. EX A. V ZDA: LICHENES RARIORES EXSICCATI NR. 69.
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome, loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome, 800 m. Ad saxa basaltica. Leg. A. V zda, 08.02.1994. EX A. V ZDA: LICHENES RARIORES EXSICCATI NR. 69.
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome, loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome, 800 m. Ad saxa basaltica. Leg. A. V zda, 08.02.1994. EX A. V ZDA: LICHENES RARIORES EXSICCATI NR. 69.
Felix Schumm - CC BY-SA 4.0
[VZR69], Insulae Canarienses, Gran Canaria: distr. San Bartolome, loco El Sequen dicto in Barranco de Tirajana, supra urbem San Bartolome, 800 m. Ad saxa basaltica. Leg. A. V zda, 08.02.1994. EX A. V ZDA: LICHENES RARIORES EXSICCATI NR. 69.
