Rinodina obnascens (Nyl.) H. Olivier

Bull. Acad. Int. Géogr. Bot., 12: 380, 1903. Basionym: Lecanora obnascens Nyl. - Flora, 69: 462, 1886.
Synonyms:
Distribution: N -TAA (Nascimbene & al. 2021), Lig. C - Tosc, Laz, Sar. S - Bas (Nimis & Tretiach 1999), Si (Pišút 1995, Iacolino & Ottonello 2006).
Description: Thallus crustose, thinly episubstratic, dark reddish grey to brown-black, rimose-areolate, isidiate-blastidiate, forming small islands on the thalli of (mainly) aspicilioid lichens. Areoles to 0.7 mm wide, developing on a black hypothallus, flat, with marginal, blackish, isidioid blastidia which may cover the whole thallus surface. Apothecia lecanorine, sessile and constricted at base, 0.3-0.8 mm across, with a dark brown to black, mostly flat disc, a smooth to blastidiate thalline margin, and a more or less evident parathecial ring. Thalline exciple 60-70 µm laterally, the cortex c. 10 µm thick, without an epinecral layer, without crystals; proper exciple to 10 μm wide laterally, 25-40 μm wide in upper part; epithecium dark red-brown, K-; hymenium colourless, 70-90 μm high, not inspersed with oil droplets; paraphyses 1.5-2(-3) μm thick at mid-level, the apical cells 3.5-6 μm wide; hypothecium colourless, up to 150 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 13-21 x 7-12 μm, Milvina-type, the torus well developed, the walls ornamented. Pycnidia black, immersed. Conidia bacilliform, 3-4 x c. 1 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a Mediterranean-Atlantic lichen found on weakly inclined to horizontal surfaces of siliceous rocks wetted by rain, starting the life-cycle especially on Aspiciliella intermutans, but sometimes on other lichens, e.g. Rhizocarpon-species; mostly Tyrrhenian in Italy, but also reported from the Alps.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by isidia, or isidia-like structures (e.g. schizidia)
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
paras Aspicilia spp. and other crustose lichens

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: extremely rare
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: rather rare
Humid mediterranean belt: rare
Dry mediterranean belt: extremely rare

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples
INDEX FUNGORUM GBIF


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11756)
2001/12/18



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11756)
2001/12/18
on the host, Aspicilia intermutans



Andrea Moro; Owner: Department of Life Sciences, University of Trieste
Italy, Lazio, Roma, Ruines of ancient Tusculum, above Frascati
18/03/2017


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


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


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


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


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


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


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



Felix Schumm - CC BY 4.0
[VZ1964], Hispania. Prov Albacete, Bienservida, Canada del Conejo, 850 m. Ad saxa schistosa. in thallo lichenis (Aspicilia intermutanbs) parasitans. Leg. J. Egea et X. Llimona, 27.5.1978, det. J. Egea. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1964.



Felix Schumm - CC BY 4.0
[VZ1964], Hispania. Prov Albacete, Bienservida, Canada del Conejo, 850 m. Ad saxa schistosa. in thallo lichenis (Aspicilia intermutanbs) parasitans. Leg. J. Egea et X. Llimona, 27.5.1978, det. J. Egea. EX A. VEZDA LICHENES SELECTI EXSICCATI NR. 1964.