1,720,995 research outputs found
Michel N. Brézillon, La dénomination des objets de pierre taillée. Matériaux pour un vocabulaire des préhistoriens de langue française
No full textCahen Daniel. Michel N. Brézillon, La dénomination des objets de pierre taillée. Matériaux pour un vocabulaire des préhistoriens de langue française. In: L'antiquité classique, Tome 38, fasc. 1, 1969. pp. 352-353
Taxonomy and Evolution of the Buckthorn Family (Rhamnaceae) in Southeast Asia
Full text linkSoutheast Asia is one of the world’s most floristically diverse regions, with 50,000 flowering plant species recognised and an estimated 10,000 more that have yet to be scientifically documented. My research contributes to filling this knowledge gap by documenting plants in the Rhamnaceae family from Southeast Asia. Except for Flora of Thailand, which followed the conclusions of our publications, none of the region’s major Flora initiatives have completed accounts for Rhamnaceae. Much of their diversity is still unknown, and species boundaries are unclear. A phylogeny-based tribal classification published in 2000 is the foundation of our current understanding of evolutionary relationships within the Rhamnaceae. The phylogenetic position of some genera is still uncertain. The family is thought to have originated in the Cretaceous and mostly diversified into its current tribes in Gondwana, based on fossil evidence. Recent discovery of older fossils suggest that it may have originated in the Jurassic. We have published taxonomic revisions and new species descriptions in four genera: Ventilago, Smythea, Gouania and Ziziphus. We revised the genus Smythea throughout its range, including six new species descriptions, described three new Ventilago species, plus two additional species in New Caledonia and Vanuatu, revised the genus Gouania in western Malesia, and contributed the first revision of Ziziphus in Borneo, including three new species and two new variety descriptions. This work, carried out between 2016 and 2021, lays the groundwork for a future revision of the entire family across the region. This research will help to understand the evolutionary history of the Rhamnaceae family. Almost all the plants I documented are woody climbers that either twine around the host plant (Smythea and Ventilago), use tendrils (Gouania) or spines along their stems to climb (Ziziphus). Some have wind-dispersed winged fruits (Ventilago, Smythea, and Gouania), while others have fleshy fruits dispersed by animals (Ziziphus). These different means of climbing and fruit dissemination may have affected the evolution and spread of the woody climbing species in different ways
A new species of Smythea (Rhamnaceae) from New Guinea
No full textUtteridge, Timothy M.A., Cahen, Daniel (2021): A new species of Smythea (Rhamnaceae) from New Guinea. Phytotaxa 498 (3): 152-158, DOI: 10.11646/phytotaxa.498.3.1, URL: http://dx.doi.org/10.11646/phytotaxa.498.3.
Cahen (Daniel), Haesaerts (Paul), 1984.-Peuples chasseurs de la Belgique préhistorique dans leur cadre naturel
No full textAudouze Françoise. Cahen (Daniel), Haesaerts (Paul), 1984.-Peuples chasseurs de la Belgique préhistorique dans leur cadre naturel . In: Les Nouvelles de l'archéologie, n°18, Hiver 84-85 1985. Archéobotanique. 1ère partie : les différentes disciplines mises en jeu. pp. 126-127
FIGURE 1 in A new species of Smythea (Rhamnaceae) from New Guinea
No full textFIGURE 1. Smythea papuana. Image of the holotype Hoogland 3685 (CANB 74365).Published as part of Utteridge, Timothy M.A. & Cahen, Daniel, 2021, A new species of Smythea (Rhamnaceae) from New Guinea, pp. 152-158 in Phytotaxa 498 (3) on page 154, DOI: 10.11646/phytotaxa.498.3.1, http://zenodo.org/record/542421
Le lustre des faucilles et les autres traces d'usage des outils en silex
No full textGysels J., Cahen Daniel. Le lustre des faucilles et les autres traces d'usage des outils en silex. In: Bulletin de la Société préhistorique française, tome 79, n°7, 1982. pp. 221-224
Le site magdalénien du Buisson Campin à Verberie (Oise)
No full textAudouze Françoise, Cahen Daniel, Keeley Lawrence-H., Schmider Béatrice. Le site magdalénien du Buisson Campin à Verberie (Oise). In: Gallia préhistoire, tome 24, fascicule 1, 1981. pp. 99-143
FIGURE 2. Smythea papuana, key diagnostic morphological characters. A in A new species of Smythea (Rhamnaceae) from New Guinea
No full textFIGURE 2. Smythea papuana, key diagnostic morphological characters. A unequal leaf base; B axillary domatia; C obscurely serrulate leaf margins (abaxial view); D base of fruit showing sparsely hairy persistent calyx and the densely hairy fruit wing, note the slight twist in the base of the fruit. All from Hoogland 3685. Photographs: Timothy Utteridge.Published as part of Utteridge, Timothy M.A. & Cahen, Daniel, 2021, A new species of Smythea (Rhamnaceae) from New Guinea, pp. 152-158 in Phytotaxa 498 (3) on page 155, DOI: 10.11646/phytotaxa.498.3.1, http://zenodo.org/record/542421
Emmanchement des outils danubiens de Belgique : données techniques et tracéologiques
No full textTechnical and microwear data indicate that the blades and blade tools of the Linear Band Ceramic industry (Ancient Neolithic) of Belgium were hafted. Observations made on archaeological specimens suggest that hafting was of a loose type, consisting of a piece of hide wrapped around the basis of the blades, the whole being inserted within a hard handle. However, experimentation failed to reproduce such traces visible on the archaeological artifacts. The time required for the formation of such traces is likely to be much longer than that for the development of wear traces.Données techniques et tracéologiques convergent pour indiquer que les lames et outils sur lames du Rubané (Néolithique ancien) de Belgique étaient emmanchés. Les observations effectuées sur les pièces archéologiques indiquent qu'il s'agissait d'un emmanchement non serrant, comportant un manchon en peau entourant la base des lames et des outils, l'ensemble étant vraisemblablement inséré dans un manche en matière dure. Les expériences déjà effectuées n'ont pas permis de reproduire les traces d'emmanchement décelées sur les pièces archéologiques. Il est probable que le temps de formation de pareilles traces est notablement plus long que celui qui est requis pour le développement des traces d'usage.Caspar Jean-Paul, Cahen Daniel. Emmanchement des outils danubiens de Belgique : données techniques et tracéologiques. In: La Main et l’Outil. Manches et emmanchements préhistoriques. Table Ronde C.N.R.S. tenue à lyon du 26 au 29 novembre 1984, sous la direction de D. Stordeur. Lyon : Maison de l'Orient et de la Méditerranée Jean Pouilloux, 1987. pp. 185-195. (Travaux de la Maison de l'Orient, 15
- …
