Ophthalmoplax (Decapoda: Brachyura: Portunoidea) from the late Campanian, Upper Cretaceous, of Colombia
A new species of the brachyuran Ophthalmoplax is documented based upon two specimens collected from shales of the Lodolitas de Aguacaliente Formation, Guadalupe Group, (Cordillera Oriental, Colombian Andes), which represents a regional transgressive event. The small crustaceans were found in the upp...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2016 |
| País: | México |
| Institución: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:94344822002 |
| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=94344822002 https://www.redalyc.org/journal/943/94344822002/ https://www.redalyc.org/journal/943/94344822002/html/ https://www.redalyc.org/journal/943/94344822002/94344822002.epub https://www.redalyc.org/journal/943/94344822002/movil |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias de la Tierra sp anoxia Colombia Crustacea Campanian |
| Sumario: | A new species of the brachyuran Ophthalmoplax is documented based upon two specimens collected from shales of the Lodolitas de Aguacaliente Formation, Guadalupe Group, (Cordillera Oriental, Colombian Andes), which represents a regional transgressive event. The small crustaceans were found in the uppermost parasequences with retrogradational stacking pattern, near to the maximum flooding surface (MFS), at the end of the late Campanian Transgressive Systems Tract (TST). This is the oldest record for Ophthalmoplax in America. Morphological affinities with other species of the genus are discussed, including size reduction related with anoxia events and paleotemperature. |
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