Rinodina canariensis Matzer, H. Mayrhofer & P. Clerc

Nord. J. Bot., 14: 105, 1994.
Synonyms:
Distribution: C - Tosc (Matzer & al. 1994). S - Si (Matzer & al. 1994).
Description: Thallus crustose, episubstratic, up to c. 0.6 mm thick, continuous, rimose or areolate, the areoles usually inflated, smooth, pale to dark grey or ochraceous, often partly white-pruinose, sometimes with an evident dark hypothallus, often starting the life-cycle on other silicicolous crustose lichens, later usually autonomous. Medulla white in upper part, yellow to reddish brown and often K+ and C+ purple-red in lower part, I- throughout. Apothecia lecanorine, 0.6-1(-1.4) mm across, subimmersed to sessile, with a flat to convex, black, epruinose or whitish-pruinose disc, and an entire, persistent thalline margin. Epithecium dark brown, rarely olivaceous or bluish green and in this case reacting N+ red, often covered with a coarsely granular epipsamma; hymenium colourless, 100-130(-150) μm high; paraphyses 1-2 μm thick at mid-level, the apical cells 4-5 μm wide, with a dark brown cap; hypothecium colourless, up to 200 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, fusiform, often curved, (15-)18-30(-32) x 9-14 μm, similar to the Pachysporaria-type, but tending towards the Physcia-type, with a finely scabrid wall and a well-developed torus, the ontogeny of type A (apical wall thickening after septum formation). Pycnidia black, immersed, rather rare. Conidia bacilliform, 3-8 x 1-1.5 μm. Photobiont chlorococcoid. Spot tests: cortex K+ yellow, C+ red, KC+ red, P+ faintly yellow; medulla K+, and C+ purple-red in lower part. Chemistry: atranorin and variable amounts of chloroatranorin, gyrophoric, lecanoric and orsellinic acids, rarely with zeorin; medulla with an unknown pigment.
Note: a Mediterranean-Macaronesian lichen found on base-rich volcanic rocks, such as andesite and basalt, more or less confined to coastal localities and to low coastal mountains, starting the life-cycle on several species of crustose lichens, especially Acarospora heufleriana, Lecanora praepostera, Ochrolechia parella, and Pertusaria pluripuncta.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
paras crustose lichens

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: very 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


P.L. Nimis CC BY-SA 4.0
TSB 19296



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (19296)
2002/05/13


Manuel Gil
Spain, Canary Islands, Lanzarote


Manuel Gil
Spain, Canary Islands, Lanzarote