ITALIC 8.0

Acarospora placodiiformis H. Magn. nom.illegit.

Göteb. K. Vetensk. Samh. Handl., Ser. B, Math. Naturv. Skr., 6, 17: 18, 1956. nom. illegit. non Acarospora placodiiformis (Nyl.) H. Olivier (1909)

Synonyms:

Distribution: N - Emil (Nimis & al. 1996, Fariselli & al. 2020).

Description: Thallus crustose-placodioid to subsquamulose, greenish-yellow, but usually densely covered with a thick layer of white, granular pruina (the granules c. 40 μm wide), areolate, with radiating marginal lobes, forming up to 5 cm wide patches, often starting the life-cycle on terricolous species of Diploschistes, later autonomous. Areoles convex, contiguous; marginal lobes c. 2 mm broad. Medulla thick, white. Apothecia lecanorine, rounded, semi-immersed in the areoles and not constricted at base, 1-5 mm across, with a slightly concave to flat, dark reddish brown to almost black, somehow shiny, smooth disc, and a thick thalline margin. Epithecium brown; hymenium colourless, 100-150(-200) µm high, IKI+ blue; paraphyses numerous, coherent, simple to sparsely branched in upper part, 1-1.5 µm thick at base; hypothecium colourless. Asci 50-100-spored, clavate, with a distinct apical dome, K/I-. Ascospores 1-celled, hyaline, subglobose, 4-6 x 4-5 µm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV- or UV+ orange. Chemistry: rhizocarpic acid and an unknown terpenoid.

Note: a xeric subtropical species found on weathered gypsum in open situations, mostly below the montane belt. To be looked for in gypsum outcrops of Southern Italy (e.g. in Sicily).

Growth form: Crustose placodiomorph

Substrata: rocks, soil, terricolous mosses, and plant debris

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)

paras Diploschistes

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

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 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

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

Herbarium: TSB (20701)
2001/11/22

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

Herbarium: TSB (6909)
2001/11/21

Felix Schumm; Owner: CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm; Owner: CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm - CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm - CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm - CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm - CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm - CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm - CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm - CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm - CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995

Felix Schumm - CC BY-SA 4.0

[TSB 20701], Italia, Emilia-Romagna, Prov. Ravenna, Zattaglia, SW slopes of Monte Mauro, c. 400 m, on gypsum. Leg. P.L. Nimis & M. Tretiach, 13.05.1995