Asteroid trace fossils from Lower Cretaceous shallow- to marginal-marine deposits in Patagonia

Most stellate trace fossils of the ichnogenus Asteriacites are attributed to asterozoan producers in general and the majority is the result of the work of ophiuroids. The fossil record of asterozoans is scarce in South America, particularly for the Mesozoic. Asteriacites specimens found in shallow-...

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Detalles Bibliográficos
Autores principales: Fernández, Diana Elizabeth, Comerio, Marcos Alejandro, Giachetti, Luciana María, Pazos, Pablo Jose, Wetzel, Andreas
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2019
Materias:
Paleontología
Asteriacites
Asteroids
Ichnotaxonomy
Morphometry
Palaeoecology
Predator-prey interaction
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/104714
http://hdl.handle.net/11336/94933
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-104714
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Asteriacites
Asteroids
Ichnotaxonomy
Morphometry
Palaeoecology
Predator-prey interaction
spellingShingle Paleontología
Asteriacites
Asteroids
Ichnotaxonomy
Morphometry
Palaeoecology
Predator-prey interaction
Fernández, Diana Elizabeth
Comerio, Marcos Alejandro
Giachetti, Luciana María
Pazos, Pablo Jose
Wetzel, Andreas
Asteroid trace fossils from Lower Cretaceous shallow- to marginal-marine deposits in Patagonia
topic_facet Paleontología
Asteriacites
Asteroids
Ichnotaxonomy
Morphometry
Palaeoecology
Predator-prey interaction
description Most stellate trace fossils of the ichnogenus Asteriacites are attributed to asterozoan producers in general and the majority is the result of the work of ophiuroids. The fossil record of asterozoans is scarce in South America, particularly for the Mesozoic. Asteriacites specimens found in shallow- to marginal-marine Lower Cretaceous (upper Hauterivian-lower Barremian) deposits in the Neuquén Basin (Patagonia, Argentina) exhibit sculpture and morphometry typical of asteroid producers. This is the second record of asteroids from the Lower Cretaceous of South America. The close association between these Asteriacites possibly produced by astropectinids and traces assignable to Siphonichnidae are suggestive of a predator-prey interaction, adding palaeoecological information for community-structure reconstruction of these deposits. For ichnotaxonomic evaluation, morphometric parameters of Asteriacites were elaborated using simple photogrammetric procedures applied on negative epirelief specimens and undertraces to define edges of the stellate trace fossils.
format Articulo
Preprint
author Fernández, Diana Elizabeth
Comerio, Marcos Alejandro
Giachetti, Luciana María
Pazos, Pablo Jose
Wetzel, Andreas
author_facet Fernández, Diana Elizabeth
Comerio, Marcos Alejandro
Giachetti, Luciana María
Pazos, Pablo Jose
Wetzel, Andreas
author_sort Fernández, Diana Elizabeth
title Asteroid trace fossils from Lower Cretaceous shallow- to marginal-marine deposits in Patagonia
title_short Asteroid trace fossils from Lower Cretaceous shallow- to marginal-marine deposits in Patagonia
title_full Asteroid trace fossils from Lower Cretaceous shallow- to marginal-marine deposits in Patagonia
title_fullStr Asteroid trace fossils from Lower Cretaceous shallow- to marginal-marine deposits in Patagonia
title_full_unstemmed Asteroid trace fossils from Lower Cretaceous shallow- to marginal-marine deposits in Patagonia
title_sort asteroid trace fossils from lower cretaceous shallow- to marginal-marine deposits in patagonia
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/104714
http://hdl.handle.net/11336/94933
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bdutipo_str Repositorios
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