ITALIC 8.0

Rhizocarpon dinothetes Hertel & Leuckert

Herzogia, 5: 27, 1979.

Synonyms:

Distribution: C - Sar (Brackel & Berger 2019).

Description: Thallus crustose, areolate, greenish yellow, shiny, forming more or less orbicular, 3-8 mm wide patches on the thalli of Protoparmelia-species. Medulla white, I-. Apothecia lecideine, black, constricted at base, round, 0.4-0.7 mm across, mostly developing inbetween the areoles, with an initially flat, then strongly convex disc, and an initially thick and wavy, finally thinner proper margin. Exciple well-developed, with a 30-40 μm wide, purple-black rim, colourless within; epithecium brown-black, K+ purple; hymenium colourless, c. 130 μm high; paraphysoids strongly conglutinated, richly branched and anastomosing, sometimes slightly capitate; hypothecium brown-black. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus, lacking an ocular chamber, Rhizocarpon-type. Ascospores muriform or submuriform, dark brown, usually with 3 transverse septa and 1-2 longitudinal septa (with 4-16 cells visible in optical view), 13.5-24.5 x 8.5-11.5 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: cortex with rhizocarpic acid.

Note: on siliceous rocks near and above treeline, starting the life-cycle on the thalli of Protoparmelia badia; probably present also in the Italian Alps, and to be looked for there.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

paras Protoparmelia

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

Herbarium samples

Index Fungorum GBIF

Einar Timdal http://nhm2.uio.no/lav/web/index.html - CC BY-NC

Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC