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首页> 外文期刊>Journal of South American earth sciences >Lower and Middle Devonian Malvinokaffric ostracods from the Precordillera Basin of San Juan, Argentina
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Lower and Middle Devonian Malvinokaffric ostracods from the Precordillera Basin of San Juan, Argentina

机译：阿根廷圣胡安Precordillera盆地的泥盆纪中低层马尔文诺卡弗阶龙类

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摘要

Ostracod from the upper Lower to Middle Devonian rocks of the Argentine Precordillera Basin (Talacasto and Punta Negra formations) are studied. One new genus Pircawayra nov. gen., and five species (including three new: Pircawayra gigantea nov. gen. and sp., Lapazites trinodis nov. sp. and Keslingiellal teresae nov. sp.) are defined. The recorded ostracod fauna closely resembles that coeval from Bolivia and South Africa, exhibiting a remarkable endemism, not-only at the genus level, but also at the species level. In addition to its low-diversity, the Malvinokaffric ostracod association is also characterized by having large, thick, coarsely ornamented and swollen valves. The similar ostracod composition from the Andean and South African basins suggests faunal exchange between these two areas. Based on the ostracod faunas, the Malvinokaffric Realm is clearly recognizable at least up to the Middle Devonian.
机译：研究了阿根廷Precordillera盆地下部（上至中泥盆纪）上部（Talacasto和Punta Negra地层）的兽脚类动物。 Pircawayra nov的一个新属。定义了5个物种（包括3个新物种：Pircawayra gigantea nov。sp。和sp。，Lapazites trinodis nov。sp。和Keslingiellal teresae nov。sp。）。所记录的兽脚类动物动物群与玻利维亚和南非的近代动物非常相似，不仅在属水平上而且在物种水平上都表现出显着的特有性。除了多样性低之外，马尔文氏链节纲还具有大，厚，装饰粗糙和肿胀的瓣膜的特征。来自安第斯山脉和南非盆地的相似的兽脚类动物组成表明这两个区域之间的动物区系交换。根据兽类动物的种类，至少在中泥盆纪之前，Malvinokaffric领域是显而易见的。

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