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Paradictyodora Antarctica: A new complex vertical spreite trace fossil from the Upper Cretaceous-Paleogene of Antarctica and Tierra del Fuego, Argentina

Published online by Cambridge University Press:  20 May 2016

Eduardo B. Olivero ,
Luis A. Buatois  and
Roberto A. Scasso
Eduardo B. Olivero
Affiliation:
1Centro Austral de Investigaciones Científicas (CADIC-CONICET), CC 92, 9410 Ushuaia, Tierra del Fuego, Argentina,
Luis A. Buatois
Affiliation:
2Instituto Superior de Correlación Geológica, CC 1; 4000 San Miguel de Tucumán, Argentina,
Roberto A. Scasso
Affiliation:
3Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pabellón 2; 1428 Buenos Aires, Argentina,
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Abstract

A new ichnotaxon, Paradictyodora antarctica, is proposed for complex spreite trace fossils from the Upper Cretaceous of Antarctica and Eocene of Tierra del Fuego, Argentina. This complex, three-dimensional, vertical spreite structure enlarges upwards, displaying a prismatic-to-conical shape that consists of subvertical folded laminae, produced by the lateral migration of a subvertical J-shaped tube anchored at its base. Overall morphology and mode of formation distinguishes this new ichnotaxa from other ichnogenera such as Daedalus, Dictyodora, and Heimdallia. Paradictyodora occurs in fodinichnia-dominated ichnocoenosis developed in distal fine-grained deposits of deepwater fan delta systems.

Type
Research Article
Information
Journal of Paleontology , Volume 78 , Issue 4 , July 2004 , pp. 783 - 789
Copyright
Copyright © The Paleontological Society 

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