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Registros recuperados: 21
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A synopsis of Mendoncia (Acanthaceae) in continental Africa including the description of two new species from western Central Africa and a new subspecies from West Africa Naturalis
Breteler, F.J.; Wieringa, J.J..
The amphi-atlantic genus Mendoncia of the Acanthaceae counts c. 80 species. In tropical Africa it is represented by 14 species, eight in continental Africa and six in Madagascar. The remaining species occur in tropical America. The new species Mendoncia camerounensis and M. rabiensis are described and illustrated. Mendoncia floribunda is resurrected, fully described, and illustrated as well. Mendoncia iodioides, reduced to a variety of M. phytocrenoides in the Flore du Gabon, is restored as a distinct species. The isolated western population of Mendoncia gilgiana is recognised as a new subspecies. The conservation status of all species is assessed. Only a few of them are classified as Least Concern, the others as ranging from Critically Endangered to...
Tipo: Article / Letter to the editor Palavras-chave: Cameroon; Gabon; Key; Mendoncia; New species; New subspecies; Taxonomy.
Ano: 2018 URL: http://www.repository.naturalis.nl/record/655988
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Dual symbiosis in a Bathymodiolus sp mussel from a methane seep on the gabon continental margin (southeast Atlantic): 16S rRNA phylogeny and distribution of the symbionts in gills ArchiMer
Duperron, Sebastien; Nadalig, Thierry; Caprais, Jean-claude; Sibuet, Myriam; Fiala Medioni, Aline; Amann, Rudolf; Dubilier, Nicole.
Deep-sea mussels of the genus Bathymodiolus (Bivalvia: Mytilidae) harbor symbiotic bacteria in their gills and are among the dominant invertebrate species at cold seeps and hydrothermal vents. An undescribed Bathymodiolus species was collected at a depth of 3,150 m in a newly discovered cold seep area on the southeast Atlantic margin, close to the Zaire channel. Transmission electron microscopy, comparative 16S rRNA analysis, and fluorescence in situ hybridization indicated that this Bathymodiolus sp. lives in a dual symbiosis with sulfide- and methane-oxidizing bacteria. A distinct distribution pattern of the symbiotic bacteria in the gill epithelium was observed, with the thiotrophic symbiont dominating the apical region and the methanotrophic symbiont...
Tipo: Text Palavras-chave: Gabon; Southeast Atlantic; Methane seep; Hydrothermal vent; Deep sea; RRNA analysis; Methane concentration; Gill epithelium; Symbiosis; Bacteria; Mytilidae.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-1266.pdf
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Evolving hunting practices in Gabon: lessons for community-based conservation interventions Ecology and Society
Schleicher, Judith; Department of Geography, University of Cambridge, Downing Place, Cambridge CB2 3EN, UK; School of Geography and the Environment, University of Oxford, S Parks Road, Oxford OX1 3QY, UK; schleicher.judith@gmail.com; Hymas, Olivier; Human Ecology Research Group, Department of Anthropology, University College London, UK; Institute of Zoology, Zoological Society of London, UK; ohymas@onetel.com; Coad, Lauren; Environmental Change Institute, School of Geography and the Environment, Oxford University, UK; Center for International Forestry Research, Bogor, Indonesia; lauren.coad@ouce.ox.ac.uk.
Addressing today’s environmental challenges is intimately linked to understanding and improving natural resource governance institutions. As a result conservation initiatives are increasingly realizing the importance of integrating local perspectives of land tenure arrangements, natural resource rights, and local beliefs into conservation approaches. However, current work has not sufficiently considered the dynamic nature of natural resource governance institutions over time and the potential implications for current conservation interventions. We therefore explored how and why hunting governance has changed since the precolonial period in two ethnic hunting communities in Gabon, Central Africa, integrating various ethnographic methods with...
Tipo: Peer-Reviewed article Palavras-chave: Bushmeat; Gabon; Historical ecology; Hunting; Natural resource governance.
Ano: 2015
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Gilbertiodendron grandistipulatum (Leguminosae-Caesalpinioideae), a singular species from West Central Africa and new record for Congo (Brazzaville) Boletín de la Sociedad
De La Estrella,Manuel; Devesa,Juan Antonio.
Gilbertiodendron (Leguminosae-Caesalpinioideae) is an endemic tropical African genus of ca. 30 species, most of which are trees of primary forest. The highest concentration of species and morphological variation is found in the Guineo-Congolian region, particularly in Gabon. One of those species is G. grandistipulatum, which is easily recognized by its stipules (up to 18 cm long) and flowers (adaxial petal up to 12.5 × 14 cm). The taxonomy, habitat and distribution of G. grandistipultaum are discussed, extending its known distribution to Congo. A full description, distribution map and two illustrations are provided for the first time for this species.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Congo; Detarieae; Gabon; Taxonomy; Tropical forest.
Ano: 2014 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722014000100016
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Novitates Gabonenses 52. A new variety within the Sporobolus indicus complex (Gramineae) Naturalis
Sosef, M.S.M.; Ngok Banak, L..
Within the polymorphic S. indicus complex a new variety, var. saxicola Sosef & Ngok Banak, is being distinguished, based on its small habit, short and narrow leaves and especially its lax panicle with short primary branches.
Tipo: Article / Letter to the editor Palavras-chave: Sporobolus; Grasses; Inselbergs; Taxonomy; Africa; Gabon.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/524798
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Novitates Gabonenses 57. Begonia sosefiana (Begoniaceae). A new species in section Loasibegonia from Gabon Naturalis
Wilde, J.J.F.E. de; Valkenburg, J.L.C.H. van.
A new narrowly endemic Begonia species discovered during recent fieldwork in the northern part of the Doudou Mountains in Gabon is described.
Tipo: Article / Letter to the editor Palavras-chave: Begoniaceae; Begonia; Sect. Loasibegonia; Africa; Gabon; Taxonomy.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/525099
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Novitates Gabonenses 61. A new rare endemic Calvoa (Melastomataceae) from Mbe National Park, Gabon Naturalis
Leal, M.E..
A new species of Calvoa from the Mbe National Park, Monts de Cristal is described.
Tipo: Article / Letter to the editor Palavras-chave: Calvoa; Melastomataceae; Africa; Gabon; Taxonomy.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/525908
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Novitates Gabonenses 64. A new species of Campylospermum (Ochnaceae) from coastal Gabon Naturalis
M.S.M. Sosef; D.J. Harris & K.E. Armstrong.
A curious new species of Campylospermum, C. paucinervatum, from coastal Gabon is described including some comments on its ecology and its relationship within the genus. The high botanical diversity of Loango National Park is noted.
Tipo: Article / Letter to the editor Palavras-chave: Ochnaceae; Campylospermum; Africa; Gabon; Taxonomy.
Ano: 2007 URL: http://www.repository.naturalis.nl/record/525236
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Novitates Gabonenses 65. A new rare endemic Amphiblemma (Melastomataceae) from Mve Lakene, Gabon Naturalis
Leal, M.E..
A new species of Amphiblemma from the Mvé Lakéné Plateau, Monts de Cristal is described
Tipo: Article / Letter to the editor Palavras-chave: Amphiblemma; Melastomataceae; Africa; Taxonomy; Gabon.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/525147
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Novitates Gabonenses 69. A new endemic species of and a new combination in Campylospermum (Ochnaceae) Naturalis
Bissiengou, P.; Sosef, M.S.M..
A new species of Campylospermum endemic to the Crystal Mountains, Gabon, and belonging to sect. Notocampylum is described. Besides that, a West-Central African species of Ouratea, nowadays a strictly South American genus, is transferred to Campylospermum and the necessary new combination made.
Tipo: Article / Letter to the editor Palavras-chave: Ochnaceae; Campylospermum; Ouratea; Africa; Gabon; Crystal Mountains; Endemism; Taxonomy.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/525330
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Novitates Gabonenses 73. A new species of Anthocleista (Gentianaceae) from Gabon Naturalis
Wilde, J.J.F.E. de.
Anthocleista potalioides, a new narrowly endemic species of the Chaillu Mountains in Gabon is described and illustrated. Its taxonomic position among the known African species is discussed. It stands apart by a small 8-merous corolla and a 2-locular ovary. Remarks on the affinities of the African genus Anthocleista and Potalia from tropical America are presented.
Tipo: Article / Letter to the editor Palavras-chave: Africa; Anthocleista; Gabon; Gentianaceae; Neotropics; Potalia; Potalieae; Taxonomy.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/524971
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Novitates Gabonensis 44. Uvaria annickiae, a name for a rare Uvaria species (Annonaceae) from Gabon Naturalis
Jongkind, Carel C.H..
A new species of Uvaria from Gabon is described.
Tipo: Article / Letter to the editor Palavras-chave: Annonaceae; Uvaria; Gabon; Taxonomy.
Ano: 2002 URL: http://www.repository.naturalis.nl/record/525124
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Redefinition of Thapsia Albers, 1860, and description of three more helicarionoid genera from western Africa (Gastropoda, Stylommatophora) Naturalis
Winter, A.J. de.
As presently used, the helicarionoid genus Thapsia Albers, 1860 embraces a large, heterogeneous assemblage of species. As a first step in the revision of this group of taxa, the genus Thapsia (type species Helix troglodytes Morelet, 1848) is redefined anatomically and conchologically. In the absence of alcohol-preserved material of T. troglodytes, Thapsia ebimimbangana spec. nov. from Cameroon and T. wieringai spec. nov. from Gabon are described to characterize the soft parts morphology of Thapsia. Three new genera are introduced, viz. Saphtia gen. nov. (type species S. granulosa spec. nov.), Pseudosaphtia gen. nov. (type species P. brunnea spec. nov.) and Vanmolia gen. nov. (type species Thapsia sjoestedti d’Ailly, 1896). A second species of Saphtia, S....
Tipo: Article / Letter to the editor Palavras-chave: Cameroon; Côte d'Ivoire; Gabon; Africa; Gastropoda; Taxonomy; Land snails; Helicarionoidea; Thapsia; Saphtia; Pseudosaphtia; Vanmolia; Urocyclidae; 42.73.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/273964
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ROV study of a giant pockmark on the Gabon continental margin ArchiMer
Ondreas, Helene; Olu, Karine; Fouquet, Yves; Charlou, Jean-luc; Gay, Aurelien; Dennielou, Bernard; Donval, Jean-pierre; Fifis, Alexis; Nadalig, Thierry; Cochonat, Pierre; Cauquil, E; Bourillet, Jean-francois; Le Moigne, Morgan; Sibuet, Myriam.
A giant, 800-m wide pockmark, called Regab, was discovered along the Equatorial African margin at 3160-m water depth and was explored by remote operated vehicle (ROV) as part of the Zaiango (1998-2000) and Biozaire (2001-2003) projects carried out conjointly by TOTAL and a number of French research institutes. A microbathymetric map obtained using the ROV sensors shows that the pockmark actually consists of a cluster of smaller pockmarks aligned N70 along a 15-m deep depression. Methane was recorded all over the pockmark, the highest values along the axis of the depression where massive carbonate crusts and dense seep communities were also found. Several faunal species belong to the Vesicomyidae and Mytilidae bivalve families, as well as to Siboglinidae...
Tipo: Text Palavras-chave: Gabon; Microbathymetric map; ROV; Exploration; Pockmark; Equatorial African margin.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-1239.pdf
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Taxonomic novelties in African Dracaena (Dracaenaceae) Naturalis
Damen, T.H.J.; Burg, W.J. van der; Wiland-Szymańska, J.; Sosef, M.S.M..
In preparing the treatment of Dracaena for Flore du Gabon and Flore d’Afrique centrale, a relatively high number of taxonomic and nomenclatural novelties were discovered; these are presented here. Within Dracaena five species and one forma are described as new, D. bushii, D. haemanthoides, D. marina, D. wakaensis, D. waltersiae and D. laxissima forma aureilicia. Each new species is provided with a full description and taxonomic notes. Apart from that, five species are reinstated, D. braunii, D. nitens, D. perrottetii, D. tholloniana and D. usambarensis. A further 23 names are treated here as a synonym for the first time: D. bequaertii, D. buettneri, D. cuspidibracteata, D. densifolia, D. gabonica, D. gazensis, D. ledermannii, D. letestui, D. litoralis, D....
Tipo: Article / Letter to the editor Palavras-chave: Africa; Central Africa; Dracaena; Gabon; Lucky Bamboo; New species; Taxonomy.
Ano: 2018 URL: http://www.repository.naturalis.nl/record/650130
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Taxonomic novelties in the genus Campylospermum (Ochnaceae) Naturalis
Bissiengou, P.; Chatrou, L.W.; Wieringa, J.J.; Sosef, M.S.M..
Four new species, one with two subspecies, of the genus Campylospermum are described, all endemic or sub-endemic to Gabon. These are C. auriculatum, C. gabonensis, C. gabonensis subsp. australis, C. glaucifolium and C. occidentalis. Distribution maps and scans of the holotypes are provided as well as preliminary IUCN Red List assessments. New combinations for nine species formerly assigned to the genus Ouratea and/or Gomphia are proposed: C. andongensis, C. glomeratum, C. longestipulatum, C. lunzuensis, C. lutambensis, C. nutans, C. plicatum and C. warneckei. Finally, one taxon is raised from the variety to species level, leading to the new combination C. costatum.
Tipo: Article / Letter to the editor Palavras-chave: Africa; Campylospermum; Conservation; Gabon; Gomphia; IUCN Red List; Ochnaceae; Ouratea; Taxonomy.
Ano: 2013 URL: http://www.repository.naturalis.nl/record/525772
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Tectonic history along the South Gabon Basin: Anomalous early post-rift subsidence ArchiMer
Dupre, Stephanie; Bertotti, Giovanni; Cloetingh, Sierd.
An integrated study of the South Gabon Margin (South Atlantic) based on reflection seismic and well data has been performed to quantify tectonic activity. A regional profile crossing the entire basin together with subsidence analysis, highlights important aspects of the post-rift history. The most striking event in the margin evolution appears to be the anomalous extra subsidence during the early post-rift period characterized by high sedimentation rates, equivalent to one third of the syn-rift subsidence. Although the presence of evaporite layers restricts knowledge of the underlying structures essentially composed of pre-rift and syn-rift sequences, the outcome of this post-rift tectonic study has strong implications for the rifting history. The early...
Tipo: Text Palavras-chave: Post-rift subsidence; Margin; Gabon.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-6803.pdf
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The type-locality of Pteronetta hartlaubii (Cassin, 1859) (Aves, Anatidae) Naturalis
Mees, G.F..
Currently, the type locality of Pteronetta hartlaubii is considered to be the Camma River, Gabon, but this is an error, and must be Rio Boutry, Gold Coast (now Ghana), where the holotype was obtained by H.S. Pel. In a note, reference is made to a few other specimens obtained by the collectors Pel and Nagtglas which in recent literature have been overlooked.
Tipo: Article / Letter to the editor Palavras-chave: Anatidae; Pteronetta hartlaubii; Type locality; Gabon; Ghana; West Africa; 42.83.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/220307
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Three new species of Craterispermum (Rubiaceae) from the Lower Guinea Domain Naturalis
Taedoumg, H.; Hamon, P..
Three species of Craterispermum are described from Cameroon, Equatorial Guinea and Gabon. Detailed descriptions and distribution maps are provided for each species, their conservation status is assessed and their taxonomic affinities are discussed. An identification key for the Craterispermum species present in Cameroon, Equatorial Guinea and Gabon is given.
Tipo: Article / Letter to the editor Palavras-chave: Cameroon; Craterispermum; C. deblockianum; C. rumpianum; C. sonkeanum; Equatorial Guinea; Gabon; Rubiaceae.
Ano: 2012 URL: http://www.repository.naturalis.nl/record/525559
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Trillesanthus, a validly published name to replace the African genus Marquesia (Dipterocarpaceae) Naturalis
Sosef, M.S.M..
The name Trillesanthus excelsus occurs on a set of drawings prepared by E. Delpy and shows the African Dipterocarpaceous species known as Marquesia excelsa, a near endemic of Gabon. It turns out to be an overlooked but effectively and validly published name. Therefore, the genus name Trillesanthus has priority over Marquesia. The necessary new combinations are made.
Tipo: Article / Letter to the editor Palavras-chave: E. Delpy; Dipterocarpaceae; Gabon; Marquesia; Nomenclature; Louis Pierre; Trillesanthus.
Ano: 2010 URL: http://www.repository.naturalis.nl/record/526051
Registros recuperados: 21
Primeira ... 12 ... Última
 

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