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Lecanographa atlantica (Arthoniales, Lecanographaceae), a widespread and conspicuous but still undescribed lichen-forming fungus / Damien Ertz in Phytotaxa, vol. 472, n°2 (Année 2020)

Public [article]  inPhytotaxa > vol. 472, n°2 (Année 2020) . - pp. 147-158 Titre : Lecanographa atlantica (Arthoniales, Lecanographaceae), a widespread and conspicuous but still undescribed lichen-forming fungus Type de document : texte imprimé Auteurs : Damien Ertz, Auteur ; Pieter Van den Boom, Auteur Année de publication : 2020 Article en page(s) : pp. 147-158 Langues : Anglais (eng) Catégories : [Thèmes] Lichens [Thèmes] Taxonomie Mots-clés : diversité biologique  biologie insulaire  Lecanographa atlantica  phylogénie Résumé : "Lecanographa farinosa was considered to be a lichen inhabiting coastal rocks of the Mediterranean region and to possess psoromic and conpsoromic acids as major secondary metabolites. A revision of its type specimen from Germany proved that the species has been misunderstood. In this paper, L. farinosa is shown to have a thallus containing confluentic and 2’-O-methylmicrophyllinic acids and to have a different ecology and distribution. A revision of previous reports of L. farinosa from continental Portugal and the study of recent specimens of Lecanographa cf. farinosa from the Azores, Canary Islands, Cape Verde and continental Portugal revealed a new species described as L. atlantica. Moreover, reports of L. dialeuca from France (Brittany) and of L. subgrumulosa from the Azores are considered misidentifications of L. atlantica. This latter has thus a widespread distribution ranging from the Azores to the Atlantic coast of the European continent where it inhabits volcanic rocks near the sea. Lecanographa atlantica is characterized by a whitish to cream coloured thallus, usually rounded or oblong to shortly lirelliform and white pruinose ascomata with a widely exposed hymenial disc and thin margin, (3–)5–7-septate ascospores of (16–)18.9–23(–26) × (3–)3.4–4(–4.5) µm, and a chemistry including at least 2’-O-methylperlatolic acid but lacking confluentic and 2’-O-methylmicrophyllinic acids. Psoromic acid is sometimes present in L. atlantica but its origin is unclear. Phylogenetic analyses using nuLSU sequences place L. atlantica as sister to L. hypothallina." (source : auteurs) Type de publication : périodique Référence biblio : Ertz D., Van den Boom P., 2020 - Lecanographa atlantica (Arthoniales, Lecanographaceae), a widespread and conspicuous but still undescribed lichen-forming fungus. Phytotaxa, 472 (2) : 147-158. ID PMB : 71520 DOI : 10.11646/phytotaxa.472.2.5 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71520 [article]

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The lichen genus Porina in Macaronesia, with descriptions of two new species / Emmanuël Sérusiaux in The Lichenologist, vol. 39, n°1 (Année 2007)

Public [article]  inThe Lichenologist > vol. 39, n°1 (Année 2007) . - pp. 15-33 Titre : The lichen genus Porina in Macaronesia, with descriptions of two new species Type de document : texte imprimé Auteurs : Emmanuël Sérusiaux, Auteur ; Franz Berger, Auteur ; Maarten Brand, Auteur ; Emmanuël Berger, Auteur ; Pieter Van den Boom, Auteur Année de publication : 2007 Article en page(s) : pp. 15-33 Langues : Anglais (eng) Catégories : [ZG] France [ZG] Iles macaronésiennes [ZG] Irlande [ZG] Portugal [ZG] Royaume-Uni [Thèmes] Lichens Mots-clés : clé de détermination  Porina Résumé : "Detailed studies on the lichen genus Porina in Macaronesia have led to a reappraisal of the genuine identity of Porina atlantica (Erichsen) P. M. Jørg., a characteristic species that has previously been confused with P. guaranitica, P. heterospora, P. nucula, P. mastoidea or P. rhodostoma in the literature, and is here reported from Madeira, the Canary Islands, Ireland, France and Portugal. Two new species are described: P. effilata Brand & Sérus. sp. nov. (known from Madeira, the Canary Islands, Great Britain, Ireland and Portugal) and P. ocoteae Brand & Sérus. sp. nov. (restricted to La Palma, Canary Islands, and São Jorge in the Azores). Porina leptospora Nyl. is recognized at the species level, and P. isidiata Kalb & Hafellner is reduced into synonymy with P. atlantica. A key to all known species of Porina in Macaronesia is provided." (source : auteurs) Type de publication : périodique Référence biblio : Sérusiaux E., Berger F., Brand M., Berger E., Van den Boom P., 2007 - The lichen genus Porina in Macaronesia, with descriptions of two new species. The Lichenologist, 39 (1) : 15-33. ID PMB : 69882 DOI : 10.1017/S0024282907005993 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69882 [article]

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