GEOSCAN, résultats de la recherche


TitreEighty years of chitinozoan research: from Alfred Eisenack to Florentin Paris
AuteurServais, T; Achab, A; Asselin, E
SourceReview of Palaeobotany and Palynology vol. 197, 2013 p. 143-151,
Séries alt.Secteur des sciences de la Terre, Contribution externe 20120108
Documentpublication en série
Mediapapier; en ligne; numérique
Lat/Long OENS 20.0000 20.5000 55.0000 54.7500
Sujetspalynologie; palynomorphes; palynologie systématique; analyses palynologiques; biogéochimie; biostratigraphie; biogéologie; paléontologie; Paléozoïque
ProgrammeBassins sédimentaires d'Hudson / Foxe Bay, GEM : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
In the early 1930s Alfred Eisenack first reported unknown, bottle-shaped, organic-walled microfossils that he had discovered in erratic boulders from the south-eastern shores of the Baltic Sea. Eisenack erected the new group Chitinozoa to classify these strange microfossils of unknown biological affinity. From the 1930s to the 1950s, a few publications appeared reporting new findings and providing descriptions of these fossil organisms. It was only since the 1960s, with the development of the oil industry and the intensive biostratigraphical use of organic-walled microfossils, that publications dealing with chitinozoans became more numerous and that the
description of new genera and species rapidly increased. The peak of description of new species was reached in the 1960s, but the number of publications remained high into the late 1990s. Since the 1990s the research activities on chitinozoans are conducted by amuch smaller number of scientists. One of themajor driving forces of chitinozoan research in the last forty years was Florentin Paris at the University of Rennes (Brittany, France). He first established a high-resolution chitinozoan biostratigraphy of the Ordovician of southern Europe and played an active role in bringing all scientists together for the development of global biostratigraphical schemes
and palaeobiogeographical scenarios of the Ordovician, Silurian and Devonian. Itwas also Florentin Paris, togetherwith his Estonian colleague Jaak Nõlvak,who suggested the nowwidely accepted biological interpretation that Chitinozoa are most probably egg cases of a planktonic organism unknown from the fossil record. F. Paris was also the first to collaborate with experts to use biogeochemical analyses and the C isotope signal of the chitinozoans to better understand their biological affinity and detect biogeochemical changes in Palaeozoic oceans.