[article]
| Titre : |
Naming and describing the diversity in the Usnea cornuta aggregate (lichenized Ascomycota, Parmeliaceae) focusing on Brazilian specimens |
| Type de document : |
texte imprimé |
| Auteurs : |
Alice Gerlach, Auteur ; Rosa Mara Borges da Silveira, Auteur ; Carlos Rojas, Auteur ; Philippe Clerc, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
pp. 272-302 |
| Langues : |
Anglais (eng) |
| Catégories : |
[ZG] Amérique centrale
[ZG] Amérique du sud
[ZG] Brésil
[ZG] Europe
[Thèmes] Clé de détermination
[Thèmes] Lichens
|
| Mots-clés : |
systématique Usnea cornuta Usnea flabelliformis Usnea rubropallens Usnea stipitata Usnea tenuicorticata Usnea brasiliensis Usnea macaronesica Usnea subpectinata Usnea trachyclada The multispecies coalescent (MSC) comparaison d'espèce aire de répartition |
| Résumé : |
"This study is a reassessment of the Usnea cornuta aggregate diversity mainly in Brazil. Based on previous multi-locus species delimitation analyses using the multispecies coalescent model (MSC), we carried out a posteriori morphological and anatomical studies. The following corticolous new species are described: Usnea arianae with norstictic or fatty or lobaric acids, convex and efflorescent soralia and a lax medulla; U. flabelliformis with protocetraric acid, fan-shaped main branches and a high medulla/cortex ratio; U. rubropallens with protocetraric acid and a faint orange cortical/subcortical pigment; U. stipitata with constictic acid, stipitate soralia and a high medulla/cortex ratio; and U. tenuicorticata with protocetraric acid, a thin cortex and a high medulla/cortex ratio. The newly described species were found to occur so far only in the Americas, except U. arianae which shows an amphi-atlantic distribution in Europe and on the American continent. Seven species already described belonging to the U. cornuta aggr. in Brazil are further treated here: Usnea boomiana with caperatic acid and large, concave soralia, new to South America; U. brasiliensis with protocetraric acid, minute and irregular soralia; U. cornuta with mainly salazinic acid and minute soralia fusing into consoralia; U. macaronesica (syn. nov.: U. subglabrata) with barbatic acid, large excavate soralia and a lax medulla; Usnea subpectinata, a so far european species resurrected from the U. cornuta synonymy, with stictic acid and numerous isidiofibrils, new to South America; and U. trachyclada with thamnolic acid and K+ bright yellow stipitate soralia. Full descriptions with morphological, anatomical and chemical features, geographical distributions, and illustrations are provided for each species along with an identification key." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Gerlach A., Borges da Silveira R., Rojas C., Clerc P., 2020 - Naming and describing the diversity in the Usnea cornuta aggregate (lichenized Ascomycota, Parmeliaceae) focusing on Brazilian specimens. Plant and Fungal Systematics, 65 (2) : 272-302. |
| ID PMB : |
71522 |
| DOI : |
10.35535/pfsyst-2020-0024 |
| En ligne : |
https://pfsyst.botany.pl/Naming-and-describing-the-diversity-in-the-Usnea-cornut [...] |
| Format de la ressource électronique : |
document |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71522 |
in Plant and Fungal Systematics > vol. 65, n°2 (Année 2020) . - pp. 272-302
[article]
|
Naming and describing the diversity in the Usnea cornuta aggregate (lichenized Ascomycota, Parmeliaceae) focusing on Brazilian specimens in Plant and Fungal Systematics, vol. 65, n°2 (Année 2020)
