Brachiopods from the Upper Oligocene (Chattian), Aquitaine Basin, southwestern France comprise nine species in seven genera: Novocrania Lee & Brunton, 2001, Terebratulina d'Orbigny, 1847, Megathiris d'Orbigny, 1847, Argyrotheca Dall, 1900, Joania Álvarez, Brunton & Long, 2008, Megerlia King, 1850, and Lacazella Munier-Chalmas, 1880. One megathyridid is described as a new species, Joania peyrerensis n. sp., characterized by ornamentation of 6–8 distinct, sharp ribs and by triangular, plate-like teeth. With the exception of Megathiris detruncata (Gmelin, 1791) and Lacazella mediterranea (Risso, 1826), all species are recorded for the first time from the Oligocene of the Aquitaine Basin. In taxonomic composition this brachiopod fauna displays close affinity with the Miocene faunas of the Mediterranean Province and Central Paratethys. The dominance of micromorphic megathyridids and thecideides in the Peyrère assemblage, characteristic of cryptic habitats suggests the presence of submarine caves and/or crevices, thus supporting the previous interpretations of this faunistic assemblage as a cave biocenosis. Frequency of gastropod drillings observed on the investigated brachiopods is low (4%) as is in most Cenozoic brachiopod populations. The paleotemperatures calculated from the δ18O values of brachiopod shells (21 to 24°C) correspond well to a paleoenvironmental interpretation based on paleoecology of other taxonomic groups.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 35 • No. 3