Porpidia cinereoatra (Ach.) Hertel & Knoph

in Hertel, Beih. Nova Hedwigia, 79: 437, 1984. Basionym: Lecidea cinereoatra Ach. - Lichenogr. Univ.: 167, 1810.
Synonyms: Haplocarpon cinereoatrum (Ach.) M. Choisy; Haplocarpon musivum (Körb.) Vězda; Huilia cinereoatra (Ach.) Hertel; Huilia macrocarpa var. convexa (Fr.) Hertel; Huilia musiva (Körb.) Vězda; Lecidea albocaerulescens auct. non (Wulfen) Ach.; Lecidea contigua (Hoffm.) Fr. non auct.; Lecidea convexa (Fr.) Th. Fr.; Lecidea macrocarpa var. convexa (Fr.) H. Magn.; Lecidea musiva Körb.; Lecidea ochrochlora Ach.; Porpidia herteliana Gowan; Porpidia musiva (Körb.) Hertel & Knoph
Distribution: N - VG (Castello 2002, Martellos & Castello 2004), Frl (Tretiach & Hafellner 2000), TAA (Caniglia & al. 2002, Nascimbene & al. 2022), Lomb (De Vita & Valcuvia 2004, Nascimbene 2006, Gheza & al. 2015), Piem (Isocrono & Falletti 1999, Isocrono & al. 2004, 2006), VA (Piervittori & Isocrono 1999, Piervittori & al. 2004, Isocrono & al. 2008, Favero-Longo & Piervittori 2009), Emil (Valcuvia & Delucchi 2001, Bouvet 2008, Fariselli & al. 2020), Lig (Brunialti & al. 1999). C - Tosc (UPS-L-135152), Umb (Panfili 2003), Laz, Abr (De Angelis & al. 2003, Gheza & al. 2021), Sar (Rizzi & al. 2011, Giordani & al. 2013, Neuwirth 2018, Brackel & Berger 2019). S - Camp (Nimis & Tretiach 2004), Cal (Puntillo 1996), Si (Poli & al. 1995, Grillo 1998, Czeczuga & al. 1999, Grillo & Caniglia 2004, Iacolino & Ottonello 2006).
Description: Thallus crustose, epilithic, usually thick, cracked to verrucose-areolate, the areoles 0.5-1.5(-2) mm across, flat to convex, whitish to ash grey, sometimes delimited by a black prothallus. Medulla white, I-. Apothecia lecideine, 0.5-1.5 mm across, isolated or in small clusters and sometimes confluent, most often immersed in the thallus, with a black, flat to convex, grey-blue pruinose to finally epruinose disc, and a thin proper margin which is often excluded in old apothecia. Proper exciple dark brown with a paler brown medulla, the excipular hyphae 3-5 mm thick; epithecium olive-brown to olive-green; hymenium colourless; paraphyses conglutinated, richly branched and anastomosing; hypothecium dark. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a pore, the sides of which stain I/KI+ deep blue, Porpidia-type. Ascospores 1- celled, hyaline, ellipsoid, 12-18 x 6-10 µm. Photobiont chlorococcoid. Spot tests: thallus and medulla K-, C-, KC-, P-. Chemistry: confluentic acid.
Note: on siliceous rocks wetted by rain, especially low boulders and large pebbles in rainy-humid areas, with a wide altitudinal range.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: rather rare
Submediterranean belt: rare
Padanian area: absent
Humid submediterranean belt: rather common
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
Herbarium samples
Index Fungorum GBIF

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=158&lang=en
France, Commana



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (17311)
2001/11/29


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=158&lang=en
France, Commana


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=158&lang=en
France, Commana


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=158&lang=en
France, Commana


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


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=158&lang=en
France, Hôpital Camfrout