| Автор | Vizcaïno, Daniel |
| Автор | Álvaro, J. Javier |
| Дата выпуска | 2002 |
| dc.description | ABSTRACTThe litho- and biostratigraphical subdivisions of the Tremadocian-Arenigian succession of the southern Montagne Noire are hereby revised. The Lower Ordovician diversity patterns are estimated through statistical analysis of 27 families, 64 genera and 132 species of trilobites across nine interval zones; from bottom to top: the Proteuloma geinitzi, Shumardia (Conophrys) pusilla, Euloma filacovi, Taihungshania miqueli, Taihungshania shui landyranensis, Colpocoryphe maynardensis, Neseuretus (Neseuretus) arenosus, Apatokephalus incisus and Hangchungolithus primitivus zones. Maximum trilobite diversity occurred within the E. filacovi and A. incisus zones, alternating with two sharp declines (S. (C.) pusilla and T.shui landyranensis zones), in both cases drastically related to transgressive-regressive trends. Trilobites attained their highest diversity in muddy outer-platform settings, decreasing in fine-grained sandstones and siltstones of shoreface environments, where trilobites could still be numerically abundant. Four major trilobite turnovers are recognised at the bottom of the P. geinitzi, S.(C.)pusilla, E. filacovi and T. shui landyranensis zones, in which survivors from previous intervals are not reported at specific level, and important generic replacements took place. Despite the relative incompleteness of the Lower Ordovician trilobite record, envisaged after analysing the high proportion of monotypic taxa and discontinuous ranges of some families, the trilobite record is representative enough to estimate diversity patterns, although a better understanding of the palaeoenvironmental control will greatly enhance biodiversity resolution. |
| Формат | application.pdf |
| Издатель | Royal Society of Edinburgh Scotland Foundation |
| Копирайт | Royal Society of Edinburgh |
| Тема | biogeography |
| Тема | diversity |
| Тема | environments |
| Тема | stratigraphy |
| Тема | trilobites |
| Название | Adequacy of the Early Ordovician trilobite record in the southern Montagne Noire (France): biases for biodiversity documentation |
| Тип | research-article |
| DOI | 10.1017/S0263593300000493 |
| Electronic ISSN | 1755-6929 |
| Print ISSN | 1755-6910 |
| Журнал | Earth and Environmental Science Transactions of the Royal Society of Edinburgh |
| Том | 93 |
| Первая страница | 393 |
| Последняя страница | 401 |
| Аффилиация | Vizcaïno Daniel; 7 rue Jean-Baptiste Chardin, Maquens, 11090-Carcassonne, France. e-mail: daniel.vizcaino@wanadoo.fr |
| Аффилиация | Álvaro J. Javier; UMR 8014 CNRS, Laboratoire de Paléontologie et Paléogéographie du Paléozoïque, Sciences de la Terre, Université des Sciences et Technologies de Lille, 59655-Villeneuve d'Ascq, France. e-mail: Jose-Javier.Alvaro@univ-lille1.fr |
| Выпуск | 4 |
