Protoparmelia oleagina (Harm.) Coppins

in Coppins & al., Lichenologist, 24: 368, 1992. Basionym: Lecanora oleagina Harm. - Lich. France: 1023, 1913.
Synonyms: Lecanora furva H. Magn.?
Description: Thallus crustose, episubstratic, dull olivaceous brown, epruinose, continuous to rimose-areolate, densely covered in 0.07-0.15 mm wide and up to 0.4 mm high blastidia-like granules with a one cell-layer thick, rudimentary cortex, the upper granules forming by budding from those beneath. Apothecia very rare, lecanorine, up to 0.7 mm across, sessile, with a slightly concave to flat, olivaceous grey disc and a thick thalline margin even with disc. Epithecium brownish; hymenium colourless, c. 55 μm high; paraphyses coherent, branched in upper part, c. 2 μm thick at mid-level, the apical cell c. 3 μm wide; hypothecium colourless; algal layer incomplete below hypothecium. Asci 8-spored, clavate, approaching the Lecanora-type, with a well-developed amyloid tholus and a distinct, non-amyloid axial mass. Ascospores 1-celled, hyaline, oblong, 9.5-15 x 3-3.5 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-; thallus sections release oily exudates in K. Chemistry: traces of lobaric acid and unidentified substances.
Growth form: Crustose
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)

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: absent
Montane belt: extremely rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: absent
Padanian area: absent

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Rarity

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P.L. Nimis CC BY-SA 04
TSB 34263


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34263)
2001/12/04


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Oberallgäu


Wolfgang von Brackel - CC BY-4.0
Germany, Brandenburg


Felix Schumm - CC BY-SA 4.0
VZR460], Belgium. Prov. Luxembourg,Bosteubois ( ad occidentem a Nasogne, 5°22.7' orient., 50°08.8' septentr.) 400 m. Ad corticem arborum (Quercus robur) in silva mixta. Leg & det. P. v. d. Boom. Ex A. Vezda: Lichenes Rariores Exsiccati Nr. 460.


Felix Schumm - CC BY-SA 4.0
VZR460], Belgium. Prov. Luxembourg,Bosteubois ( ad occidentem a Nasogne, 5°22.7' orient., 50°08.8' septentr.) 400 m. Ad corticem arborum (Quercus robur) in silva mixta. Leg & det. P. v. d. Boom. Ex A. Vezda: Lichenes Rariores Exsiccati Nr. 460.


Felix Schumm - CC BY-SA 4.0
VZR460], Belgium. Prov. Luxembourg,Bosteubois ( ad occidentem a Nasogne, 5°22.7' orient., 50°08.8' septentr.) 400 m. Ad corticem arborum (Quercus robur) in silva mixta. Leg & det. P. v. d. Boom. Ex A. Vezda: Lichenes Rariores Exsiccati Nr. 460.