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| Registros recuperados: 23 | |
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| Lens, F.; Baas, P.; Jansen, S.; Smets, E.. |
| The wood structure of 71 species representing 24 genera of the pantropical Lecythidaceae s.l., including the edible Brazil nuts (Bertholletia excelsa) and the spectacular cannon-ball tree (Couroupita guianensis), was investigated using light and scanning electron microscopy. This study focused on finding phylogenetically informative characters to help elucidate any obscure evolutionary patterns within the family. The earliest diverging subfamily Napoleonaeoideae has mixed simple/scalariform vessel perforations, scalariform vessel-ray pitting, and high multiseriate rays, all features that are also present in Scytopetaloideae. The wood structure of Napoleonaea is distinct, but its supposed close relative Crateranthus strongly resembles Scytopetaloideae. The... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ericales; Lecythidaceae s.l.; Lecythidaceae s.s.; Napoleonaeaceae; Scytopetalaceae; Systematic wood anatomy; 42.48. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/422216 |
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| Lee, S.Y.; Mohamed, R.. |
| After more than 100 years since the first discovery, Aquilaria rostrata, a critically endangered species listed in the IUCN Red List and presumably extinct, has been rediscovered in Terengganu State of Peninsular Malaysia. Here, we describe the history, taxonomy, ecology and conservation status of this endemic species, and compare our findings with the species description made from the first and only collection produced prior to this study. In addition, we present the similarities between A. rostrata and several Aquilaria species occurring in Peninsular Malaysia and neighbouring regions using molecular sequence data from the nuclear ribosomal DNA (Internal Transcribed Spacer) and chloroplast intergenic spacer region (trnL-trnF). Our morphological and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Aquilaria; Conservation status; Molecular identification; Peninsular Malaysia; Single mutations; Taxonomy; 42.48. |
| Ano: 2016 |
URL: http://www.repository.naturalis.nl/record/606307 |
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| Fontaine, B.; Achterberg, C. van; Alonso-Zarazaga, M.A.; Araujo, R.; Asche, M.; Aspöck, H.; Aspöck, U.; Audisio, P.; Aukema, B.; Bailly, N.; Balsamo, M.; Bank, R.A.; Belfiore, C.; Bogdanowicz, W.; Boxshall, G.; Burckhardt, D.; Chylarecki, P.; Deharveng, L.; Dubois, A.; Enghoff, H.; Fochetti, R.; Fontaine, C.; Gargominy, O.; Lopez, M.S.G.; Goujet, D.; Harvey, M.S.; Heller, K.-G.; Helsdingen, P. van; Hoch, H.; Jong, Y. de; Karsholt, O.; Los, W.; Magowski, W.; Massard, J.A.; McInnes, S.J.; Mendes, L.F.; Mey, E.; Michelsen, V.; Minelli, A.; Nafria, J.M.N.; Nieukerken, E.J. van; Pape, Th.; Prins, W. de; Ramos, M.; Ricci, C.; Roselaar, C.; Rota, E.; Segers, H.; Timm, T.; Tol, J. van; Bouchet, P.. |
| The number of described species on the planet is about 1.9 million, with ca. 17,000 new species described annually, mostly from the tropics. However, taxonomy is usually described as a science in crisis, lacking manpower and funding, a politically acknowledged problem known as the Taxonomic Impediment. Using data from the Fauna Europaea database and the Zoological Record, we show that contrary to general belief, developed and heavily-studied parts of the world are important reservoirs of unknown species. In Europe, new species of multicellular terrestrial and freshwater animals are being discovered and named at an unprecedented rate: since the 1950s, more than 770 new species are on average described each year from Europe, which add to the 125,000... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Taxonomy; Biodiversity; Species; 42.48; 42.70. |
| Ano: 2012 |
URL: http://www.repository.naturalis.nl/record/420238 |
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| Groeninckx, I.; Vrijdaghs, A.; Huysmans, S.; Smets, E.; Dessein, S.. |
| Background and Aims Members of Rubiaceae are generally characterized by an inferior ovary. However, Mitrasacmopsis is cited in the literature as having a semi-inferior to superior ovary. It has previously been hypothesized that the gynoecial development of Rubiaceae with semi-inferior to superior ovaries takes place in the same way as in Gaertnera, one of the most commonly cited rubiaceous genera with a superior ovary. To test this hypothesis, a floral ontogenetic study of Mitrasacmopsis was carried out with special attention paid to the gynoecial development. Methods Floral ontogeny and anatomy of Mitrasacmopsis were examined using scanning electron and light microscopy. Key Results At an early developmental stage, a concavity becomes visible in the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Mitrasacmopsis quadrivalvis; Gaertnera; Floral ontogeny; 42.48. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/422222 |
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| Flores Olvera, H.; Smets, E.F.; Vrijdaghs, A.. |
| Background and Aims In spite of recent phylogenetic analyses for the Chenopodiaceae–Amaranthaceae complex, some morphological characters are not unambiguously interpreted, which raises homology questions. Therefore, ontogenetic investigations, emphasizing on ‘bracteoles’ in Atripliceae and flowers in Chenopodioideae, were conducted. This first paper presents original ontogenetic observations in Beta vulgaris, which was chosen as a reference species for further comparative investigation because of its unclarified phylogenetic position and its flowers with a (semi-)inferior ovary, whereas all other Chenopodiaceae–Amaranthaceae have hypogynous flowers. Methods Inflorescences and flowers were examined using scanning electron microscopy and light microscopy.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Beta vulgaris Cheonopodiaceae floral ontogeny gynoecial development epigynous hypanthium semi-inferior ovary inflorescence ontogeny LM SEM 42.41; 42.48; 42.58. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/449533 |
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| Haveman, R.. |
| In 2011 verscheen in dit tijdschrift een overzicht van de rozensoorten in ons land. Bakker et al hanteren in dit overzicht een artificieel, typologisch soortconcept om orde te scheppen in de chaos van Rosa sect. Caninae, waarbij de variatie via morfologische kenmerken wordt verdeeld in eenheden, waaraan vervolgens de status van soort wordt toegekend. De stand en duurzaamheid van de kelkbladeren, alsmede de doorsnede van het stijlkanaal spelen daarbij een belangrijke rol. Deze kenmerken blijken echter volgens een al in 2003 gepubliceerd artikel10 geheel overerfd te worden via het mannelijke erfelijk materiaal. Bij het doorgeven van erfelijk materiaal aan de nieuwe generatie vindt waarschijnlijk geen recombinatie plaats en worden de vrouwelijke kenmerken,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Rosa sect. Caninae; 42.41; 42.48. |
| Ano: 2016 |
URL: http://www.repository.naturalis.nl/record/606377 |
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| Coritico, F.P.; Fleischmann, A.. |
| Drosera rotundifolia, a species of the temperate Northern Hemisphere with a disjunct occurrence in high montane West Papua, has been discovered in a highland peat bog on Mt Limbawon, Pantaron Range, Bukidnon on the island of Mindanao, Philippines, which mediates to the only other known tropical, Southern Hemisphere location in New Guinea and the closest known northern populations in southern Japan and south-eastern China. A dichotomous key to the seven Drosera species of the Philippines is given, and distribution maps are provided. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Carnivorous plants; Drosera; Droseraceae; Malesia; Mindanao; Northern Hemisphere; Tropics; Disjunction; Philippines; 42.58; 42.48. |
| Ano: 2016 |
URL: http://www.repository.naturalis.nl/record/606354 |
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| Merckx, V.; Schols, P.; Maas - Van de Kamer, H.; Maas, P.; Huymans, S.; Smets, E.. |
| The mycoheterotrophic Burmanniaceae are one of the three families currently recognized in the order Dioscoreales. Phylogenetic inference using nucleotide sequences of the nuclear 18S rDNA region and the mitochondrial nad1 b-c intron revealed two well-supported, major lineages within the family, corresponding to the two tribes recognized in the family: Burmannieae and Thismieae. All data supported a strong relationship between Thismieae and Tacca (Dioscoreaceae) making both Burmanniaceae and Dioscoreaceae polyphyletic. The three largest Burmanniaceae genera, Burmannia, Gymnosiphon, and Thismia, are paraphyletic. The splitting of Burmanniaceae into Burmannieae and Thismieae indicates two independent origins of mycoheterotrophy and correlated loss of... |
| Tipo: Article / Letter to the editor |
Palavras-chave: 18S rDNA; Burmanniaceae; Dioscoreales; Molecular phylogeny; Mycoheterotrophy; Nad1 b-c intron; Thismiaceae; 42.48. |
| Ano: 2006 |
URL: http://www.repository.naturalis.nl/record/422338 |
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| Moon, H.-K.; Vinckier, S.; Smets, E.F.; Huysmans, S.. |
| This study provides new pollen data of 52 representative species belonging to all 12 genera in the currently classification of the subtribe Nepetinae, and considers the possible presence of orbicules for the first time. Pollenmorphology and ultrastructure were investigated with light, scanning electron and transmission electron microscopy. Nepetinaepollen is small to large (P = 16–65 µm, E = 17–53 µm), oblate to prolate (P/E = 0.7–1.6) in shape and mostly hexacolpate (sometimes octocolpate). The exine stratification in all taxa studied is similar and characterized by unbranched columellae and a continuous, granular endexine. Sexine ornamentation in the Nepetinae is bireticulate, microreticulate or perforate. In perforate and microreticulate pattern a... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Nepetoidea orbicules palynology Nepetinae sexine ornamentation ultrastructure 42.41; 42.48; 42.58. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/449553 |
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| Vrijdaghs, A.; Goetghebeur, P.; Smets, E.; Caris, P.. |
| The inflorescence unit of Schoenus nigricans and S. ferrugineus consists of a zigzag axis and distichously arranged bracts, each of which may or may not subtend a bisexual flower. Each flower seems to terminate a lateral axis. These features have led to a controversy about the nature of the inflorescence unit, particularly whether it is monopodial or sympodial. It was often seen as a pseudospikelet composed of a succession of lateral axes, each subtended by the prophyll of the previous axis, as in a rhipidium. Many authors, however, consider the inflorescence units of all Cyperaceae to be indeterminate, racemose, actual spikelets. In our study, we present new SEM observations on the floral ontogeny of S. nigricans, corroborating a monopodial interpretation... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Floral ontogeny; Monopodial; Rhipidium; Schoenus nigricans; SEM; Spikelet; 42.48. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/414074 |
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| Veldkamp, J.F.. |
| Themeda Forssk. (Gramineae) has 11 taxa in Malesia. A revision is provided with keys, synonymy, where necessary lectotypifications, descriptions, and notes. Themeda gigantea nearly is a Philippine endemic, but with a single collection from Halmahera, and one as far away as the Solomon Islands. Themeda caudata is reduced to T. villosa var. caudata, comb. nov., and T. intermedia to T. villosa var. polyantha, comb. nov. Themeda polycephala, a new species, is described from Laos. Themeda hookeri is a new record for Thailand. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Lectotypification; Thailand; 42.57; 42.48. |
| Ano: 2016 |
URL: http://www.repository.naturalis.nl/record/606337 |
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| Lens, F.; Schönenberger, J.; Baas, P.; Jansen, S.; Smets, E.. |
| The systematic significance of wood anatomical characters within Ericales is evaluated using separate and combined parsimony analyses including 23 wood characters and 3945 informative molecular characters. Analyses of wood features alone result in poorly resolved and conflicting topologies. However, when pedomorphic character states are coded as inapplicable, the combined bootstrap topology results in an increase of resolution and support at most deeper nodes compared with the molecular analyses. This suggests that phylogenetic information from the limited number of morphological characters is not completely swamped by an overwhelming amount of molecular data. Based on the morphology of vessels and fibers, and the distribution of axial parenchyma, two... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Anatomy; Phylogeny; Ericales; 42.48. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/422235 |
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| Simpson, D.A.; Muthama Muasya, A.; Alves, M.V.; Bruhl, J.J.; Dhooge, S.; Chase, M.W.; Furness, C.A.; Ghamkhar, K.; Goetghebeur, P.; Hodkinson, T.D.; Marchant, A.D.; Reznicek, A.A.; Nieuwborg, R.; Roalson, E.H.; Smets, E.; Starr, J.R.; Thomas, W.W.; Wilson, K.L.; Zhang, X.. |
| Since the Monocots II meeting in 1998, significant new data have been published that enhance our systematic knowledge of Cyperaceae. Phylogenetic studies in the family have also progressed steadily. For this study, a parsimony analysis was carried out using all rbcL sequences currently available for Cyperaceae, including data for two new genera. One of the four subfamilies (Caricoideae) and seven of the 14 tribes (Bisboeckelereae, Cariceae, Cryptangieae, Dulichieae, Eleocharideae, Sclerieae, Trilepideae) are monophyletic. Subfamily Mapanioideae and tribe Chrysitricheae are monophyletic if, as the evidence suggests, Hellmuthia is considered a member of Cypereae. Some other features of our analysis include: well-supported Trilepideae and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cyperaceae; Monocotyledons; Phylogeny; RbcL; Sequence; 42.48. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/414071 |
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| Burgt, X.M. van der. |
| Two new tree species, Didelotia korupensis and Tessmannia korupensis (Leguminosae, Caesalpinioideae), are described and illustrated. Didelotia korupensis is the 12th species in the genus. It is an understory tree to 15 m tall with an often leaning stem to 30(–53) cm diam. Didelotia korupensis is only known from an area of c. 4 km2 in and near the permanent plots along the P transect in the southern part of Korup National Park in Cameroon, where 51 trees have been recorded so far. Didelotia korupensis is assessed according to IUCN criteria as Endangered. Tessmannia korupensis is the 13th species in the genus. It is a canopy tree to 39 m tall with a stem to 105 cm diam. Tessmannia korupensis is known from seven groups of trees of 9 to 43 trees each, in and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Africa; Detarieae; Endangered; Fabaceae; IUCN; Rain forest; Taxonomy; 42.48. |
| Ano: 2016 |
URL: http://www.repository.naturalis.nl/record/606363 |
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| Registros recuperados: 23 | |
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