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| Main Author: | |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Servicio Nacional de Geología y Minería
2019
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| Online Access: | https://www.redalyc.org/articulo.oa?id=173961655009 https://www.redalyc.org/journal/1739/173961655009/ https://www.redalyc.org/journal/1739/173961655009/html/ https://www.redalyc.org/journal/1739/173961655009/173961655009.epub https://www.redalyc.org/journal/1739/173961655009/movil https://doi.org/10.5027/andgeoV46n2-3157 |
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Table of Contents:
- Brittle stars from the Lower Cretaceous of Patagonia: first ophiuroid articulated remains for the Mesozoic of South America Diana E. Fernández Luciana Giachetti Sabine Stöhr Ben Thuy Damián E. Pérez Marcos Comerio Pablo J. Pazos Ciencias de la Tierra Ophiopetra Ophiuroidea Ophionereididae Early Cretaceous Southern Hemisphere The first articulated remains of ophiuroids for the Mesozoic of South America are described from the Lower Cretaceous of Neuquén Basin, Argentina. The taxonomic analysis allows the assignment of the material described herein to the extinct genus Ophiopetra. The specimens belong to a new species, but considering the poor preservation, a new name is not introduced, as it would be based on an incomplete diagnosis. Certain characteristics (e.g., the diameter of the disc, the width/height ratio of the vertebrae) suggest that these ophiuroids are paedomorphic specimens. In light of the latest classification of the Ophiuroidea, and new insights on the spine articulation microstructure of Ophiopetra lithographica presented herein, a transfer of Ophiopetra to the family Ophionereididae within the order Amphilepidida is proposed. This material expands the palaeogeographic record of this genus, since it represents the first remains of Ophiopetra described in the Southern Hemisphere. It is also the first Cretaceous record of the genus worldwide. 2019 artículo científico 0718-7092 https://www.redalyc.org/articulo.oa?id=173961655009 https://www.redalyc.org/journal/1739/173961655009/ https://www.redalyc.org/journal/1739/173961655009/html/ https://www.redalyc.org/journal/1739/173961655009/173961655009.epub https://www.redalyc.org/journal/1739/173961655009/movil https://doi.org/10.5027/andgeoV46n2-3157 en http://www.redalyc.org/revista.oa?id=1739 Andean Geology application/pdf Servicio Nacional de Geología y Minería Andean Geology (Chile) Num.2 Vol.46