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A micro-crustacean has recently been discovered in Vendée. It is an Ostracod living in temporary bodies of slightly brackish or fresh water. From the Cyprididae family, Cypris bispinosa is a crustacean whose presence in France is only known from eight countess. It is however one of our largest ostracods, and the lateral spine fixed on each side of its carapace make the species easily recognisable with a lens.
In 1869 Tacite Letourneux described a new species of gasteropod, Valvata bourguignati, in a spring in south-east Vendée. The name of this new species was later considered to be synonymous with Neohoratia globulina. Recent samplings in the Locus typicus have permitted the revision of this taxon, now named Islamia moquiniana.
On the intertidal zone of Le Veillon at Talmond-Saint-Hilaire (Vendée, France), in 1963 Gilbert Bessonnat discovered traces of vertebrate footprints in a Hettangian formation. On March 28th & 29th, at this site a study session was held on the theme: "sites with vertebrate footprints on the Triassic-Jurassic limit". Palæontologists, palæobotanists, sedimentologists, hydrologists, scientific historians and naturalists compared their results and projected further research. This exceptional Vendée heritage site is to be protected and developed.
It has been forty years since the Jurassic site of Veillon in Talmont-Saint-Hilaire (Vendée, France), where footprints of vertebrates were found, was plundered. This outstanding site belonging to Vendée's geological patrimony needs to be preserved and developed. Some footprints from Veillon are displayed in the collections of about thirty public institutions and six museums.
The Liassic Talmont-Saint-Hilaire (Vendée, France) outcrop has been studied here according to the abundance of fossil plants of the Cheirolepidiaceous family (Gymnosperms, Coniferales). A new species of Brachyphyllum has been studied in light microscopy, even in scanning electron microscopy and transmission electron microscopy. It is, at that time, one of the most complete study realized on a fossil taxon. Epidermal cells, subsidiary cells and guard cells have been described on both adaxial and abaxial surfaces, in transversal and longitudinal sections. Cuticle ultrastructural variations have been observed between epidermal and stomatal cells. To conclude, we propose a discussion about the cuticle structure variations related to environmental conditions and the functional morphology of the different cells.
Mythes et identités antillaises : l'auto-exotisme dans l'écriture martiniquaise et guadeloupéenne
(2003)
Ouvrages représentatifs de deux types d'écriture de l'exotisme, l'un né en Guadeloupe, l'autre en Martinique, 'La colonie du nouveau monde' (1993) de Maryse Condé et 'Texaco' (1992) de Patrick Chamoiseau illustrent un rapport divergent à la fois à l'Autre (la métropole) et à soi-même (la culture antillaise). Ainsi, l'interrogation de la notion d'identité caractéristique de l'écriture torturée de bon nombre d'écrivains guadeloupéens tels Maryse Condé, Gisèle Pineau et Daniel Maximin fait pendant à la certitude affichée des défenseurs d'une identité créole martiniquaise dont Patrick Chamoiseau, Raphaël Confiant et Edouard Glissant. Afin de comprendre l'ambiguïté culturelle des départements d'outre-mer antillais, ceux-là introduisent le thème de la folie dans le développement de leurs personnages-individus, tandis que ceux-ci affirment des archétypes à travers la recreation du mythe fondateur.
Dans un carton des archives saint-simoniennes, qui plus est consacré au "dogme", figure le manuscrit d'un compte rendu de l'essai publié en 1834, à Leipzig, par Moritz Veit, sous le titre ainsi traduit: "Saint-Simon et le saint-simonisme. Alliance générale des peuples et paix èternelle." Bien avant la prétendue révélation faite par Leroux en 1842, c'est là, sauf erreur, la toute premiëre trace en français d'une rumeur accréditée en Allemagne par Carové dès 1831. Quelles que soient l'origine et la destination de ce curieux texte (il y a lieu de le croire traduit de l'allemand ou rédigé par un Allemand de Paris), sa présence atteste que les intéressés n'ignorërent pas les soupçons d'allogénéité suscités en
France et en Allemagne par l'étrangeté de leur doctrine. L'auteur, en effet, s'appuie sur la présentation hégélianisante du saint-simonisme par Veit pour trouver confirmation de sa propre intuition, formée, dit-il, bien antérieurement, que la "clé" de toutes ces bizarreries idéologiques françaises serait "une ressemblance décidée avec la philosophie de Hegel".
Palichnites et muséologie
(2003)
After they had intrigued the inquiring or observant mind for decades, it was realised that certain "natural curiosities" were tracks of extinct creatures, related to gigantic birds or other antediluvian animals. At the beginning of the XIXth century a new science, ichnology, came into being and developed, thanks to the collection, preservation and study of fossil prints. The increasing quantity of evidence thus unearthed reveals the diversity of vertebrate faunas which have trod the earth’s surface and left behind valuable information about their characteristics and behaviour. Like other institutions labouring on behalf of conservation, knowledge of nature and the preservation of our natural heritage, the Nantes Natural History Museum has, for nearly two centuries, collected, conserved, displayed and brought to the attention of the public those valuable pieces of evidence, fossil footprints. Displays of fossil prints are regularly presented during different exhibitions. Examples of them permit one to follow the evolution of our knowledge of these prints and illustrate how the information yielded by these prints has been transmitted.
Using the fossil dinosaur footprints of the lower Lias of Le Veillon at Talmont-Saint-Hilaire, (Vendée) as a starting point, the reconstitution by pupils of a unique fossil-bearing site is under consideration. The paleobiology and paleoecology of reptiles in this geological site are dealt with.
In the Talmondais (Vendée) the Hettangian sedimentation locally begins with fluviatil clastic deposits prior to the deposition of shallow marine carbonates. These clastics, including the footprint-bearing beds of Le Veillon (south of Talmont- Saint-Hilaire) are subject to important and frequent variations in thickness. Drilling and geophysic data indicate a tectonic control of these variations. A fault-block pattern is proposed. At a small scale, it gives an illustration of the extensional tectonic processes related to the evolution of the Biscay rift during the early Liassic.