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Serusiaux E.,University of Liege | van den Boom P.,Arafura 16 | Ertz D.,Jardin botanique national de Belgique
Fungal Biology | Year: 2010

The generic segregates of the widespread fruticose genus Ramalina (mostly based on empirical data on morphology, cortex anatomy and secondary metabolites) are studied using maximum parsimony, maximum likelihood and Bayesian analyses of nuclear LSU and ITS sequences. The species examined include the three species aggregates within Niebla from the western coasts of North America, all species except one assumed to belong to the same genus from Macaronesia and the Mediterranean basin, the type species of Dievernia and Ramalina, and representatives of the genus Fistulariella. The genus Niebla is strongly supported when restricted to species from the New World, and all species referred to it from Macaronesia and the Mediterranean basin belong to Ramalina (R. bourgeana, R. crispatula, R. cupularis, R. hamulosa, R. portosantana, R. rosacea, R. subwebbiana and R. webbii). No support is found for the genera Dievernia and Fistulariella. The internal topology of the large genus Ramalina is unresolved and needs further studies. © 2010 The British Mycological Society. Source

Diederich P.,Musee National DHistoire Naturelle | Lawrey J.D.,George Mason University | Sikaroodi M.,George Mason University | Van Den Boom P.P.G.,Arafura 16 | Ertz D.,Jardin botanique national de Belgique
Fungal Diversity | Year: 2012

Morphological, anatomical, chemical and molecular data suggest that a relatively common lichenicolous coelomycete on Lecanora conizaeoides is conspecific with Phoma cytospora, previously known only from parmelioid lichens, and that further populations on Cladonia and Pertusaria belong to the same species. This species is distinguished from Phoma by several taxonomically important characters and obviously represents a previously unrecognized genus, for which the name Briancoppinsia is introduced. Phylogenetic analyses using nuLSU and mtSSU sequences of isolates obtained in pure culture suggest that the new genus belongs to the Arthoniaceae (Arthoniales). This is the first obligate lichenicolous, non-lichenized anamorph confirmed to belong to the Arthoniales based on molecular data. © Kevin D. Hyde 2011. Source

Suija A.,University of Tartu | Ertz D.,Jardin botanique national de Belgique | Lawrey J.D.,George Mason University | Diederich P.,Musee national dhistorie naturelle
Fungal Diversity | Year: 2014

The Helotiales are an ecologically and morphologically highly diverse group of ascomycetes that also includes lichen-inhabiting (lichenicolous) species. We generated sequence data of three rDNA regions (nuSSU, nuLSU, 5.8S of ITS) from 28 lichenicolous specimens representing nine genera in order to determine their phylogenetic placement. Based on the most complete dataset of helotialean fungi to date, the analyses were performed using Maximum Likelihood (ML) and Bayesian approaches. Our results suggest that 1) the lichen-inhabiting life-style in Helotiales was subjected to gains or losses at least three times; 2) Thamnogalla, previously tentatively included in Ostropales, is shown to belong to Helotiales; 3) ascomata found intermixed with pycnidia of the asexual Diplolaeviopsis ranula and possessing the same pigments are tentatively considered as the sexual morph of this taxon, and are shown to belong to Helotiales; 4) the lichenicolous species of cf. Diplolaeviopsis, Llimoniella, Rhymbocarpus, Skyttea, Thamnogalla and Unguiculariopsis form a well-supported clade together with non-lichenicolous encoelioid fungi from the genera Ionomidotis, Cordierites and Encoelia; 5) Geltingia associata forms a highly supported clade with the fungicolous asexual fungus Eleutheromyces subulatus, whereas Pezizella epithallina clusters with an aquatic asexual fungus Tetracladium sp.; 6) Phaeopyxis punctum belongs to Ostropomycetidae (Lecanoromycetes), but its deep relationships to other groups remain unresolved based on rDNA sequences. © 2014, Mushroom Research Foundation. Source

Champluvier D.,Jardin botanique national de Belgique
Plant Ecology and Evolution | Year: 2013

Background and aims - This second precursor to the Acanthaceae treatment in the Flore d'Afrique Centrale deals with the genus Justicia. Methods - The material of BR, BRLU, BM and K was examined. Flowers were boiled in water and dissected under a Wild M5 lens. Other parts of the plants were measured on dry material. Pollen of several species was critical point-dried and studied under a SEM JEOL 5800LV. Results - Eleven new species are recognized; illustrations and distribution maps are provided. One overlooked species is discussed. The pollen of five species was investigated to allow their placement in the classification of Graham. © 2013 National Botanic Garden of Belgium and Royal Botanical Society of Belgium. Source

Champluvier D.,Jardin botanique national de Belgique
Plant Ecology and Evolution | Year: 2011

Background and aims - This is a first contribution describing novelties in the Acanthaceae, discovered on the occasion of the preparation of the families' instalment for the 'Flore d'Afrique centrale'. It deals with the genus Barleria. Methods - Material from BR, BRLU, BM and K was examined. Flowers were boiled in water and examined under a Wild M5 lens. Others measurements were made on dry material. Results - Two new species representing cases of vicariance and four other novelties belong to sect. Barleria. A vicariant pair of sect. Fissimura and a new species of sect. Cavirostrata are presented. The identity of the overlooked Barleria kaessneri (sect. Somalia) is clarified. The eight new species come from the Zambezian centre of endemism (some of them transgressing in the Guineo-Congolian centre). Drawings or photographs are provided for most species. © National Botanic Garden of Belgium and Royal Botanical Society of Belgium. Source

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