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Sauvagesia nicaisei (Coquand) et Durania blayaci (Toucas) ont été définies dans des localités voisinesdu Sud algérois. Si la seconde espèce est assez bien décrite (Toucas 1909; Pervinquière 1912), la première, selon la littérature, semble regrouper plusiers espèces dont Durania blayaci, Sauvagesia nicaisei et une forme nouvelle Sauvagesia tellensis nov. sp. dont la description est donnée. Comme chez...
The Lower Cretaceous rudist genera PachytragaPaquier and RethaCox are recognized as the oldestmembers of the Family Caprinidae d'Orbigny, re-diagnosed here according to myocardinal (hinge plus myophoral) characters, instead of pallial canals. In this clade, postero-dorsalward tilting of the posterior mycardinal shelves created a posterior accessory cavity within each valve, trapping the posterior...
This paper presents the first actual documentation of the Wenlock age of the Sharawra Member(Qalibah Formation) of north-western Saudi Arabia by a direct palynological evidence. The local chitinozoan biozones and three new chitinozoan species, Pseudoclathrochitina sharawraensis sp. nov., Ancyrochitina parafragilis sp. nov. et Anthochitina jawfensis sp. nov. are described herein. Eurypterid remains,...
Une nouvelle espèce de pentacrine, Balanocrinus maritimus nov. sp., est décrite à partir de plusieurs spécimens relativement complets découverts dans le Kimméridgien inférieur (biozone à Rupellense) au Nord de La Rochelle (Charente-Maritime, France). Sa place au sein de la sous-famille des Balanocrininae et du genre Balanocrinus est discutée ainsi que la taphonomie du gisement et les indices paléoécologiques...
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