ITALIC 7.0

Acarospora lavicola J. Steiner

Denkschr. math.-naturw. Cl. K. Akad. Wiss. Wien, 71: 95, 1902.

Synonyms:

Distribution: C - Sar. S - Si.

Description: Thallus crustose, episubstratic, sulphur yellow, sometimes finely white-pruinose, areolate. Areoles flat, 0.4-1.5 x 0.2-0.5 mm, scattered to usually contiguous, mostly angular. Cortex 30-50 µm thick; algal layer uneven, interrupted by hyphal bundles; medulla white. Apothecia aspicilioid or lecanorine, immersed in the thallus, mostly round, 0.3-0.6(-0.8) mm across, with a dark brown disc and a more or less evident thalline margin. Epithecium brownish; hymenium colourless, up to 120 μm high, K/I+ blue turning reddish; paraphyses coherent, hardly swollen at apex; hypothecium colourless. Asci 100-200-spored, clavate, the apical dome K/I-. Ascospores 1-celled, hyaline, broadly ellipsoid to subglobose, 3.5-4.5 x 2-3.5 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV+ orange. Chemistry: rhizocarpic acid.

Note: a xeric subtropical species of igneous rocks in dry-warm areas, ranging from Macaronesia through southern Europe to Arabia. The species could be confused with forms of A. heufleriana which are poor in norstictic acid, previously treated as A. heufleriana var. massiliensis (Roux in litt.).

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Subcontinental: restricted to areas with a dry-subcontinental climate (e.g. dry Alpine valleys, parts of Mediterranean Italy)

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: extremely rare

Dry mediterranean belt: extremely rare

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

Felix Schumm; Owner: CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php (Courtesy: Anita Stridvall)

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

Herbarium: TSB (9638)
2001/11/21

Domenico Puntillo; Owner: Domenico Puntillo

Italy, Herb. Puntillo 4030

Felix Schumm; Owner: CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987

Felix Schumm – CC BY-SA 4.0

Image from: F. Schumm (2008) - Flechten Madeiras, der Kanaren und Azoren. Beck, OHG - ISBN: 978-3-00-023700-3

Felix Schumm – CC BY-SA 4.0

Image from: F. Schumm (2008) - Flechten Madeiras, der Kanaren und Azoren. Beck, OHG - ISBN: 978-3-00-023700-3

Felix Schumm - CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987.

Felix Schumm - CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987.

Felix Schumm - CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987.

Felix Schumm - CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987.

Felix Schumm - CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987.

Felix Schumm - CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987.

Felix Schumm - CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987.

Felix Schumm - CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987.

Felix Schumm - CC BY-SA 4.0

[TSB_9638], Italy, Sardinia, Prov. Nuoro, Torre Argentina N of Bosa, on tuff, c. 20 m. Leg. P.L. Nimis & M. Tretiach, 07.1987.

Manuel Gil

Spain, Canary Islands, Lanzarote