ITALIC 8.0

Candelariella oleaginescens Rondon

in Vezda, Sched. ad Lich. Sel. Exs., 14: no. 341, 1966.

Synonyms:

Distribution: C - Emil (Fariselli & al. 2020).

Description: Thallus (which might belong to a host lichen) crustose, episubstratic, grey, turning olive- green when wet, of subsquamulose 0.1-0.2 mm thick, 0.3-1.5 mm wide, scattered to contiguous areoles. Apothecia lecanorine, 0.3-0.7 mm across, with a concave to slightly convex, pale yellow to livid yellow disc (turning olive-green when wet), and a bright yellow, entire or crenulate, sometimes flexuose, persistent proper margin, often surrounded by a greyish thalline margin. Epithecium yellow-brown, granulose, 10-15 μm high; hymenium colourless, 45-60 μm high, I+ blue; paraphyses mostly simple, c. 2 μm thick at mid-level, the apical cells not markedly swollen; hypothecium colourless, 60-90 μm high. Asci 8–spored, clavate, with an apical dome which is I+ blue only in the internal, lower part, interrupted in the centre by an I+ paler blue strip, Candelaria-type. Ascospores 1-celled (rarely a few 1-septate), hyaline, straight to slightly curved, 15-25 x 4-7 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: pulvinic acid derivatives in the apothecia.

Note: this rather poorly known, probably Mediterranean-Macaronesian species, characterised by a grey to brown thallus and 8-spored asci, occurs on calcareous rocks, most often not far from the coast; it might have been overlooked in Italy. It can be easily confused with C. plumbea, that has a much thicker thallus with darker, wider, subsquamulose areoles, or even more with small-areolate specimens of Candelariella aurella called subsp. glebulosa Asta, Clauzade & Cl. Roux ex Cl. Roux. These three taxa (plus parasitic forms of C. aurella growing on lichens with a grey thallus) would be well-worthy of a molecular analysis.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Taxon bound to maritime-coastal situations

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: very 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

Manuel Gil

Spain, Canary Islands, Lanzarote, Guatisea

Smithsonian Institution - Source: https://lichenportal.org/cnalh/collections/individual/index.php?occid=2779360 – CC BY-SA-NC

France, Provence-Alpes-Côte d'Azur, Bouches-du-Rhône, Marseille, in collibus Marseilleveyre, prope puits de Lierre.
Vezda, Lich. Sel. Exs. 341, ISOTYPE

Smithsonian Institution - Source: https://lichenportal.org/cnalh/collections/individual/index.php?occid=2779360 – CC BY-SA-NC

France, Provence-Alpes-Côte d'Azur, Bouches-du-Rhône, Marseille, in collibus Marseilleveyre, prope puits de Lierre.
Vezda, Lich. Sel. Exs. 341, ISOTYPE

Smithsonian Institution - Source: https://lichenportal.org/cnalh/collections/individual/index.php?occid=2779360 – CC BY-SA-NC

France, Provence-Alpes-Côte d'Azur, Bouches-du-Rhône, Marseille, in collibus Marseilleveyre, prope puits de Lierre.
Vezda, Lich. Sel. Exs. 341, ISOTYPE

Harrie Sipman – Source http://www.bgbm.fu-berlin.de/sipman/Zschackia/AegeanLichens/CaloplacaAC.htm - As Caloplaca oasis

Smithsonian Institution - Source: https://lichenportal.org/cnalh/collections/individual/index.php?occid=2779360 – CC BY-SA-NC

France, Provence-Alpes-Côte d'Azur, Bouches-du-Rhône, Marseille, in collibus Marseilleveyre, prope puits de Lierre.
Vezda, Lich. Sel. Exs. 341, ISOTYPE

Manuel Gil

Spain, Canary Islands, Lanzarote

Manuel Gil

Spain, Canary Islands, Lanzarote

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=860&lang=en

France, Aber

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=860&lang=en

France, Aber

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=860&lang=en

France, Aber

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=860&lang=en

France, Aber