11 rue Saint Leon

Saint-Pol-de-Léon, France

11 rue Saint Leon

Saint-Pol-de-Léon, France
SEARCH FILTERS
Time filter
Source Type

Carter B.E.,Duke University | Larrain J.,Science & Education | Manukjanova A.,University of South Bohemia | Shaw B.,Duke University | And 6 more authors.
Molecular Phylogenetics and Evolution | Year: 2017

Frullania subgenus Microfrullania is a clade of ca. 15 liverwort species occurring in Australasia, Malesia, and southern South America. We used combined nuclear and chloroplast sequence data from 265 ingroup accessions to test species circumscriptions and estimate the biogeographic history of the subgenus. With dense infra-specific sampling, we document an important role of long-distance dispersal in establishing phylogeographic patterns of extant species. At deeper time scales, a combination of phylogenetic analyses, divergence time estimation and ancestral range estimation were used to reject vicariance and to document the role of long-distance dispersal in explaining the evolution and biogeography of the clade across the southern Hemisphere. A backbone phylogeny for the subgenus is proposed, providing insight into evolution of morphological patterns and establishing the basis for an improved sectional classification of species within Microfrullania. Several species complexes are identified, the presence of two undescribed but genetically and morphologically distinct species is noted, and previously neglected names are discussed. © 2016 Elsevier Inc.


PubMed | University of South Bohemia, Science & Education, Ludwig Maximilians University of Munich, Duke University and 3 more.
Type: | Journal: Molecular phylogenetics and evolution | Year: 2016

Frullania subgenus Microfrullania is a clade of ca. 15 liverwort species occurring in Australasia, Malesia, and southern South America. We used combined nuclear and chloroplast sequence data from 265 ingroup accessions to test species circumscriptions and estimate the biogeographic history of the subgenus. With dense infra-specific sampling, we document an important role of long-distance dispersal in establishing phylogeographic patterns of extant species. At deeper time scales, a combination of phylogenetic analyses, divergence time estimation and ancestral range estimation were used to reject vicariance and to document the role of long-distance dispersal in explaining the evolution and biogeography of the clade across the southern Hemisphere. A backbone phylogeny for the subgenus is proposed, providing insight into evolution of morphological patterns and establishing the basis for an improved sectional classification of species within Microfrullania. Several species complexes are identified, the presence of two undescribed but genetically and morphologically distinct species is noted, and previously neglected names are discussed.


Thouvenot L.,11 rue Saint Leon | Reeb C.,French Natural History Museum
Telopea | Year: 2014

A new species of Riccardia, R. elisabethae, is described from ultramafic substrate in mountain scrubland of New Caledonia. The new species is a member of the subgen. Thornoneura and differs from other species of this group by the rigid, unwinged thallus made up of large epidermal cells surrounding smaller medullary cells with thick porose walls and huge trigones. © 2014 Royal Botanic Gardens and Domain Trust.


Thouvenot L.,11 rue Saint Leon | Muller F.,TU Dresden
Cryptogamie, Bryologie | Year: 2016

The genus Macromitrium is one of the richest genera of mosses in New Caledonia, although unrevised to date, with 44 names currently accepted. A new species, Macromitrium humboldtense, is described and illustrated here. It is characterized by 1) a soft and shaggy habit, when dry with the leaves irregularly individually twisted and loosely spirally arranged, with their thin points unevenly oriented; 2) branches relatively short and crowded; 3) branch leaves large (> 3.6 mm), narrowly lanceolate, regularly tapering from basal 1/8 of the leaf, long acuminate, ending in a piliform apex; 4) upper cells papillose, basal cells mainly smooth; 5) setae long (> 15 mm), calyptrae glabrous. Comparison with piliferous species of Macromitrium in neighbouring countries is given. Ecological and geographical features for the three long cuspidate Macromitrium in New Caledonia are discussed. © 2016 Adac. Tous droits reserves.


Muller F.,TU Dresden | Thouvenot L.,11 rue Saint Leon | Shu L.,East China Normal University
Cryptogamie, Bryologie | Year: 2016

Eight species of liverworts (Cheilolejeunea incisa, Cololejeunea dozyana, Drepanolejeunea dactylophora, Lejeunea mizutanii, Leptolejeunea serrulata, Phaeolejeunea amicorum, Plagiochila sciophila, Spruceanthus thozetianus) are reported as new for New Caledonia. Species endemic to New Caledonia and hitherto only known from one or very few localities were reported from additional localities. Sporophytes of Macromitrium larrainii as well as male plants of Pogonatum neo-caledonicum were found for the first time and are described. Bazzania erosa is excluded from the bryophyte flora of New Caledonia. © 2016 Adac. Tous droits reserves.


Thouvenot L.,11 rue Saint Leon | Reeb C.,CNRS Systematics, Biodiversity and Evolution Institute
Telopea | Year: 2014

A new species of Riccardia, R. elisabethae, is described from ultramafic substrate in mountain scrubland of New Caledonia. The new species is a member of the subgen. Thornoneura and differs from other species of this group by the rigid, unwinged thallus made up of large epidermal cells surrounding smaller medullary cells with thick porose walls and huge trigones. © 2014 Royal Botanic Gardens and Domain Trust.


Thouvenot L.,11 rue Saint Leon | Yong K.-T.,University of Malaya
Cryptogamie, Bryologie | Year: 2015

The moss Macromitrium larrainii sp. nov. from Mt Panié, the highest summit of New Caledonia, is described and illustrated. This species is characterised by 1) the hairy appearance of branches due to the long aristate leaves arranged irregularly, not spirally, 2) the narrow leaf lamina asymmetrical above, 3) leaf cells consistently smooth, and 4) upper leaf cells irregular in shape and basal ones linear with a straight lumen. Comparison with similar Macromitrium species in neighbouring countries confirms that it is a new species, likely endemic. © 2015 Adac. Tous droits réservés.


Thouvenot L.,11 rue Saint Leon | Gradstein S.R.,French Natural History Museum | Zhu R.-L.,East China Normal University
Cryptogamie, Bryologie | Year: 2015

The liverwort Ceratolejeunea bardatii sp. nov. (Lejeuneaceae) is described and illustrated from submontane, mesophilous valley forest of New Caledonia. The new species stands out by 1) leaf lobes with a 2-cells wide vitta of dark brown ocelli and some additional adjacent ocelli; 2) upper leaf margins with allorgella-type denticulations; 3) utricles absent; and 4) perianths short obovoid and with 4 flat or twisted horns. The new species constitutes the first record of the genus Ceratolejeunea for New Caledonia. © 2015 Adac. Tous droits réservés.

Loading 11 rue Saint Leon collaborators
Loading 11 rue Saint Leon collaborators