Porpidia macrocarpa (DC.) Hertel & A.J. Schwab

in Hertel, Beih. Nova Hedwigia, 79: 437, 1984. Basionym: Patellaria macrocarpa DC. in Lamarck & de Candolle - Fl. Franç., éd. 3, 2: 347, 1805.
Synonyms: Haplocarpon macrocarpum (DC.) M. Choisy; Huilia macrocarpa (DC.) Hertel; Lecidea baderi Müll. Arg.; Lecidea contigua auct. p.p.; Lecidea contigua var. platycarpa (Ach.) Fr.; Lecidea contortula Stirt.; Lecidea macrocarpa (DC.) Steud.; Lecidea macrocarpa f. oxydata (Körb.) Vain.; Lecidea macrocarpa var. steriza (Ach.) Vain.; Lecidea phylliscina Nyl.; Lecidea platycarpa Ach.; Lecidea steriza (Ach.) Vain.; Lecidea tenebrans Nyl.; Lecidea vinorubens Werner
Description: Thallus crustose, endolithic or thinly epilithic, continuous to rimose-areolate, white, yellowish white, or pale grey, rarely ochre-coloured, sometimes delimited by a dark prothallus. Medulla white, I-. Apothecia lecideine, more or less round, sometimes clustered, slightly constricted at base, 1-4 mm across, with a black, flat to convex, sometimes slightly pruinose disc, and a more or less persistent, usually entire, thick and tumid (0.15-0.25 mm thick), raised proper margin. Proper exciple black to dark brown in outer part, paler and K- within (rarely K+ yellow), with 3-9 µm wide hyphae; epithecium brown or olivaceous brown; hymenium colourless, I+ blue, 90-130(-150) µm high; paraphyses sparingly branched and anastomosing; hypothecium pale to usually dark brown. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a pore, the sides of which are strongly amyloid, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, (16-)18-25(-28) x (5-)7-11(-14) µm. Photobiont chlorococcoid. Spot tests: thallus K- or K+ yellow, C-, KC-, P- or P+ orange. Chemistry: stictic acid (major), constictic, norstictic and cryptostictic acids (all minor or trace), or without lichen substances.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rather rare
Subalpine belt: rather common
Montane belt: rather rare
Dry submediterranean belt: very rare
Humid submediterranean belt: rather rare
Padanian area: absent

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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Rarity

absent
extremely rare
very rare
rare
rather rare
rather common
common
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extremely common
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Occurrence data
Predictive map
Model ImageCurrent prediction (1981-2010)
Model ImageFuture prediction (2071-2100) SSP 1-2.6
Model ImageFuture prediction (2071-2100) SSP 5-8.5
Predictive maps according to Francesconi et al. 2025

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13599)
2001/11/29


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, Audierne


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, Commana


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, Morgat


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, Roscanvel


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, Lostmarc'h


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, La Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, La Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, La Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, La Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, La Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, La Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, La Fraternitè


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=160&lang=en
France, La Fraternitè


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany: Hesse.


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


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


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


Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in op. Recoaro Ton.
As Lecidea platycarpa


Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in op. Recoaro Ton.
As Lecidea platycarpa