ITALIC 8.0

Rinodina sicula H. Mayrhofer & Poelt

Bibl. Lichenol., 12: 143, 1979.

Synonyms: Rinodina orculariopsis H. Mayrhofer

Distribution: C - Sar (Mayrhofer & Sheard 2007). S - Cal (Mayrhofer & Sheard 2007), Si (Giralt & Llimona 1997).

Description: Thallus crustose, thinly episubstratic, rimose-areolate to areolate, grey-white to dark grey, often with a pale ochraceous tinge, mostly delimited by a black prothalline line. Apothecia lecanorine, abundant, adnate to sessile, up to 0.6 mm across, with a dark brown to black, flat to slightly convex disc, and an entire, persistent or rarely finally excluded thalline margin. Epithecium pale reddish brown, with an epipsamma of very small crystals, K-; hymenium colourless, not inspersed with oil droplets, 80-100 μm high; paraphyses slender, 1-1.5 μm thick at mid-level, the apical cells only slightly swollen, 2-3 μm wide; hypothecium colourless, up to 100 μm high. Asci 8-spored, clavate, the K/I+ blue tholus penetrated by a faintly amyloid apical cushion with parallel or diverging flanks, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, (14-)16-19(-21) x (7.5-)8-10(-11) μm, Physconia-type, with a well-developed torus and a finely warted wall, the ontogeny of type A (apical wall thickening after septum formation). Photobiont chlorococcoid. Spot tests: thallus K-, C+ pink, KC+ pink, P- (reactions best visible on a thick section under the microscope). Chemistry: gyrophoric, lecanoric, orsellinic acids and sometimes traces of zeorin.

Note: a Mediterranean to subatlantic early coloniser of compact siliceous rocks, forming inconspicuous patches amongst other crustose lichens; certainly overlooked, and more widespread, especially in Tyrrhenian Italy, but generally rare. Earlier records from Tuscany and Sardinia (see Nimis 1993: 637) refer to saxicolous forms of R. archaea (Mayrhofer & Sheard 2007). See also Giralt & Llimona (1997).

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Pioneer species

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: absent

Oromediterranean belt: absent

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: rare

Humid mediterranean belt: very 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

Index Fungorum GBIF

Harrie Sipman https://archive.bgbm.org/sipman/Zschackia/AegeanLichens/Rinodina.htm

Harrie Sipman - Source: https://archive.bgbm.org/sipman/Zschackia/AegeanLichens/Rinodina.htm

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

Herbarium: TSB (13070)
2001/11/29

Harrie Sipman - Source: https://archive.bgbm.org/sipman/Zschackia/AegeanLichens/Rinodina.htm

Source: Giralt M. & Llimona X. (1997) Mycotaxon 52: 175-224

Modified from: https://gzu.jacq.org/GZU000272931

GZU000272931 - Collector Hertel,I. & Hertel,H. s.n. Date 1978-05-01 Location Italy / Sicilia Label Prov. Messina, Monti Nebrodi: Südlicher Ausläufer des M. Trefinaite, SW-Hänge oberhalb Borgo Pietrapizzuta bzw. Borgo Morfia ; Alt. 980 m - 1100 m Habitat niedrige Silikatblöcke am Hang