Jardin botanique national de Belgique

Meise, United Kingdom

Jardin botanique national de Belgique

Meise, United Kingdom
Time filter
Source Type

Suija A.,University of Tartu | Ertz D.,Jardin botanique national de Belgique | Lawrey J.D.,George Mason University | Diederich P.,Musee national d'historie 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.

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.

Diederich P.,Musee National dHistoire Naturelle | Ertz D.,Jardin Botanique National de Belgique | Lawrey J.D.,George Mason University | Sikaroodi M.,George Mason University | Untereiner W.A.,Brandon University
Fungal Diversity | Year: 2013

The lichenicolous anamorphic fungus Sclerococcum parmeliae was isolated in pure culture, and ITS, nuLSU and mtSSU sequences were obtained from these isolates. For comparison, sequences from S. sphaerale, the generic type, were obtained directly from freshly collected specimens. Phylogenetic analyses place S. sphaerale with species of Dactylospora and an unidentified lichen-inhabiting isolate in a strongly supported clade that is sister to a lineage comprising members of the Chaetothyriales and Pyrenulales. In contrast, S. parmeliae is inferred as a member of the Herpotrichiellaceae (Chaetothyriales) and belongs to a robustly supported clade that also includes species of Cladophialophora, Capronia semiimmersa, and Phialophora verrucosa. Within the Herpotrichiellaceae, S. parmeliae most closely resembles members of the anamorph genus Cladophialophora. Accordingly, we propose the transfer of S. parmeliae and the morphologically similar species S. cladoniae, S. hawksworthii and S. normandinae to Cladophialophora. A new lichenicolous species, Clad. megalosporae, collected twice on Megalospora in Florida and Papua New Guinea, is also described. © 2012 Mushroom Research Foundation.

Ertz D.,Jardin Botanique National de Belgique | Lawrey J.D.,George Mason University | Common R.S.,534 Fenton St | Diederich P.,Musee National dHistoire Naturelle
Fungal Diversity | Year: 2014

Lichenicolous fungi belonging to the anamorph-typified genus Phaeosporobolus and to the teleomorph-typified genus Lichenostigma were isolated in pure culture or sequenced directly, with nuLSU and mtSSU sequences obtained. Phylogenetic analyses place the species of Phaeosporobolus in a strongly supported clade with the generic type of Lichenostigma (L. maureri), the genus Phaeococcomyces and several melanized rock-inhabiting isolates. This strongly supported nonlichenized lineage is sister to the primarily lichenized Arthoniales in the Arthoniomycetes and is here described as the Lichenostigmatales. The new order is characterized by cells multiplying by budding, either representing black yeasts, or species in which conidiomata and ascomata are entirely made of an organised agglomeration of spherical yeast-like cells. This way of life is not only very different from all other Arthoniomycetes that exist only in the mycelial stage, but ascomata and conidiomata representing a dense and organised agglomeration of yeast cells might be unique amongst fungi. A further difference with the Arthoniales is the absence of paraphysoids. Phylogenetic results suggest that Phaeosporobolus usneae is the asexual stage of Lichenostigma maureri. Most species of Phaeosporobolus are transferred to the genus Lichenostigma except P. trypethelii, for which the new genus Etayoa is described. The genus Diederimyces is reduced into synonymy with Lichenostigma. Several other members of Lichenostigma are placed in the Dothideomycetes and are intermixed with Lichenothelia species. © 2013 Mushroom Research Foundation.

Champluvier D.,Jardin botanique national de Belgique | Senterre B.,Roosevelt University
Plant Ecology and Evolution | Year: 2010

Background and aims - Recent collecting in Equatorial Guinea, a country with incompletely documented biodiversity, resulted in an ample collection of the plant family Acanthaceae. Identifications resulted in the discovery of novelties, presented here. Methods - Specimens from BRLU, BR, BM, P and K were investigated. Critical point-dried pollen was observed in the SEM. Results - Three new taxa are described from Equatorial Guinea, two new species in the genera Crossandrella and Dischistocalyx and one new variety in Ascotheca. Distribution maps and illustrations for the two new species are provided. Pollen morphology adds evidence to distinguish between the three species of Crossandrella. © 2010 National Botanic Garden of Belgium and Royal Botanical Society of Belgium.

Tehler A.,Naturhistoriska riksmuseet | Ertz D.,Jardin Botanique National de Belgique | Irestedt M.,Naturhistoriska riksmuseet
Lichenologist | Year: 2013

Abstract Dirina (Roccellaceae, Arthoniales) is a monophyletic genus of crustose, saxicolous or corticolous lichenized fungi. Twenty-four species are accepted in the genus, including nine new species: Dirina angolana, D. arabica, D. astridae, D. canariensis, D. indica, D. madagascariensis, D. pacifica, D. pallescens and D. sorocarpa. A phylogenetic hypothesis is presented based on data from four molecular markers, β-tubulin, ITS 1 and 2, nuLSU and RPB2, including all recognized Dirina species worldwide. New combinations proposed include Dirina badia for Roccellina badia, Dirina jamesii for Roccellina jamesii, Dirina candida for Chiodecton candidum and Dirina teichiodes for Lecidea teichiodes. Two species are reinstated: Dirina approximata and D. monothalamia (as a new name of Chiodecton africanum). Asexual morphs described earlier at the rank forma are no longer recognized as taxonomic units viz., Dirina catalinariae f. sorediata, D. insulana f. sorediata, D. massiliensis f. sorediata, D. paradoxa ssp. paradoxa f. sorediata and D. massiliensis f. aponina. One species, Dirina calcicola, is transferred to Fulvophyton and two other species, Dirina insulae-howensis and Dirina neozelandica, are transferred to Schismatomma. Dirina follmannii is not accepted in Dirina and placed as incertae sedis. A key to the species of Dirina is provided. Vicariance through plate tectonics and continental drift versus long distance dispersal to explain biogeographical patterns is discussed. © British Lichen Society, 2013.

Ertz D.,Jardin Botanique National de Belgique | Tehler A.,Naturhistoriska riksmuseet | Irestedt M.,Naturhistoriska riksmuseet | Frisch A.,National Museum of Nature and Science | And 2 more authors.
Fungal Diversity | Year: 2014

A two-locus phylogenetic hypothesis of the family Roccellaceae is presented based on data from the nuclear ribosomal large subunit (nucLSU) and the second largest subunit of RNA polymerase II (RPB2). This analysis includes 341 sequences (166 newly generated) and 180 specimens representing about 114 species. The genera Lecanactis, Roccellina, Schismatomma and Sigridea were found to be paraphyletic/polyphyletic. In order to make these groups monophyletic, the new genera Crocellina, Diromma, Gyrographa, Gyronactis, Ocellomma, Pseudoschismatomma, Psoronactis and Vigneronia are described. The genus Sagenidium is placed in synonymy with Lecanactis. The new species Enterographa incognita, Gyronactis asiatica and Lecanactis submollis are described. Several species of Opegrapha are transferred to the Roccellaceae. Sorediate morphs are recorded for the first time in the genus Syncesia. © 2014, Mushroom Research Foundation.

Serusiaux E.,University of Liège | 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.

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.

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.

Loading Jardin botanique national de Belgique collaborators
Loading Jardin botanique national de Belgique collaborators