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标题：CRETACEOUS CONCHOSTRACANS FROM ALAGOAS BASIN (NORTHEASTERN BRAZIL)
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作者：Mitsuru Arai ; Ismar de Souza Carvalho
期刊名称：Publicación Electrónica de la Asociación Paleontológica Argentina
电子版ISSN：2469-0228
出版年度：2001
卷号：7
期号：1
页码：21-24
出版社：Asociación Paleontológica Argentina
摘要：Conchostracans from an outcrop of the Maceió Formation (Aptian-Albian, Alagoas Basin) located at Japaratinga Beach (Alagoas State, Brazil) are studied. The fossils comprise a monospecific fauna of Cyzicus pricei Cardoso, a frequent Early Cretaceous species in some Brazilian rift basins. The conchostracans from Maceió Formation occur as non-articulated and articulated valves of brownish color. The articulated valves and well preserved isolated ones are indicative of local burial without significant transport. No other fossil groups were found associated with Cyzicus pricei in Japaratinga Beach outcrops. Their ecological setting was probably similar to Recent environments: temporary ponds of alkaline freshwater. The existence of some Early Cretaceous African species presenting great morphological similarities with Cyzicus pricei [e.g., Cyzicus kasaiensis (Marlière) from Congo Basin] suggests that Brazil and Africa shared common conchostracofaunas during the Early Cretaceous.
关键词：Brazil. Alagoas Basin. Cretaceous. Aptian. Conchostracans.