ITALIC 8.0

Rinodina orculata Poelt & M. Steiner

Mitt. bot. Staatss. München, 8: 191, 1970.

Synonyms: Rinodina exigua f. corticicola Anzi; Rinodina trevisanii auct. p.p. non (Hepp) Körb.

Distribution: N - Frl (Giralt & Mayrhofer 1995), TAA (Mayrhofer & Sheard 2007, Nascimbene & al. 2007b, 2022), Lomb (Mayrhofer & Sheard 2007), Piem (Isocrono & al. 2004, Mayrhofer & Sheard 2007), VA (Piervittori & Isocrono 1999), Emil (Obermayer 2011, Fariselli & al. 2020).

Description: Thallus crustose, thinly episubstratic, usually discontinuous and consisting of small warts, whitish, grey-brown or reddish-brown, matt, without a clear prothallus. Apothecia lecanorine, sparse, adnate to sessile, 0.2-0.4(-0.6) mm across, with a brown to brow-black, flat to slightly convex disc, and a thick, entire to flexuose, finally often excluded thalline margin. Thalline exciple corticate, the cortex 5-10 μm thick, I+ faintly blue (reaction often difficult to observe); epithecium reddish brown; hymenium colourless, 60-80 μm high; paraphyses branched in upper part, the apical cells swollen, 3.5-5.5 μm wide; hypothecium colourless, 50-80 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, not constricted at septum, brown, ellipsoid, (12-)13-15(-18) x (6-)7-8(-9) μm, Physconia-type, with a well-developed torus and a relatively prolonged Physcia-type stage, the wall smooth to minutely warted, the torus well-developed, with an ontogeny of type A (apical wall thickening after septum formation). Photobiont chlorococcoid. Spot tests: K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.

Note: on the bark of conifers and subalpine shrubs, especially common on Rhododendron; certainly more widespread in the Alps, mostly near treeline.

Growth form: Crustose

Substrata: bark

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: rare

Oromediterranean belt: absent

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

P.L. Nimis CC BY-SA 4.0

TSB 21835

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

Herbarium: TSB (21835)
2001/11/29