Lorenzo Consorti , Simone Fabbi , Angelo Cipriani , Marco Franceschi , Maurizio Marino
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引用次数: 0
摘要
在有孔虫的 100 My 历史的地层记录中，只有少数物种具有高套管螺旋结构，这在有孔虫中比较少见。这种特征在有孔虫中也有记录，例如在古近纪的 Sakesaria 属中，而在白垩纪中却没有报道。我们描述了来自意大利中部和东北部亚平宁半岛和亚得里亚海碳酸盐平台浅水层的两个新的晚白垩世物种：Extentaspira pichezziae gen.除了没有二态性之外，高套管螺旋测试结构还表明它们适应了底栖生物的生活方式。这些发现可能进一步证明了与附近的晚白垩世比利牛斯海湾之间的古生物地理梯度。
Late Cretaceous high trochospiral rotaliid foraminifera from Italy
High trochospiral architecture is relatively uncommon in rotaliid foraminifera as it is observed in a few species throughout the stratigraphic record of their 100 My history. Such a feature is recorded within the lockhartiniid group, for example in the Paleogene genus Sakesaria, whereas it is not reported from the Cretaceous. We describe two new Late Cretaceous species, Extentaspira pichezziae gen. nov., sp. nov. and Extentaspira pampaloniae sp. nov., displaying high trochospiral test, from the shallow-water facies of the Apennine and Adriatic carbonates platforms of Central and Northeastern Italy. Besides the absence of dimorphism, high trochospiral test architecture suggests an adaptation to an infaunal lifestyle. These occurrences may provide further evidence on the paleo-biogeographic gradient with the nearby Late Cretaceous Pyrenean gulf.
期刊介绍：
Cretaceous Research provides a forum for the rapid publication of research on all aspects of the Cretaceous Period, including its boundaries with the Jurassic and Palaeogene. Authoritative papers reporting detailed investigations of Cretaceous stratigraphy and palaeontology, studies of regional geology, and reviews of recently published books are complemented by short communications of significant new findings.
Papers submitted to Cretaceous Research should place the research in a broad context, with emphasis placed towards our better understanding of the Cretaceous, that are therefore of interest to the diverse, international readership of the journal. Full length papers that focus solely on a local theme or area will not be accepted for publication; authors of short communications are encouraged to discuss how their findings are of relevance to the Cretaceous on a broad scale.
Research Areas include:
• Regional geology
• Stratigraphy and palaeontology
• Palaeobiology
• Palaeobiogeography
• Palaeoceanography
• Palaeoclimatology
• Evolutionary Palaeoecology
• Geochronology
• Global events.
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