Artículo
Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments
Monferran, Mateo Daniel
; Cabaleri, Nora Graciela
; Gallego, Oscar Florencio
; Armella, Claudia
; Cagnoni, Mariana Celina
Fecha de publicación:
09/2016
Editorial:
Society for Sedimentary Geology
Revista:
Palaios
ISSN:
0883-1351
e-ISSN:
1938-5323
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Spinicaudatans are a diverse and geographically widespread group of small branchiopod crustaceans with an excellent fossil record. They inhabit ephemeral freshwater habitats with warm conditions and pH levels from neutral to alkaline. Many studies have been performed on the systematics of this group, also known as ´conchostracans´, although the paleoecology of these clam shrimp has not been widely analyzed. This paper examines some aspects of the relationship between spinicaudatans and their environments from the Upper Jurassic (Canadon Asfalto Formation) of Argentina. We used sedimentological analysis to infer paleoenvironmental factors. Spinicaudatan features were also measured, including carapace size, growth band width, and growth lines. The results of this study reveal that the observed spinicaudatan species (Congestheriella rauhuti, Wolfestheria smekali, and Wolfestheria sp.) would have lived in carbonate lacustrine systems characterized by benthic microbial communities dominated by cyanobacteria. However, environmental factors such as oxygenation, pyroclastic deposits, and associated fauna (fish, ostracods, bivalves, and charophytes) were different at each locality. The spinicaudatan carapaces also show varying morphological features such as small or large carapace size, narrow or wide growth bands and low or high density of growth lines. These differences are related to abiotic (volcanic-oxygen) and biotic (fish and microbial) factors regarded as important agents for the development of the spinicaudatan populations.
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Colecciones
Articulos(CECOAL)
Articulos de CENTRO DE ECOLOGIA APLICADA DEL LITORAL (I)
Articulos de CENTRO DE ECOLOGIA APLICADA DEL LITORAL (I)
Articulos(INGEIS)
Articulos de INST.DE GEOCRONOLOGIA Y GEOLOGIA ISOTOPICA (I)
Articulos de INST.DE GEOCRONOLOGIA Y GEOLOGIA ISOTOPICA (I)
Citación
Monferran, Mateo Daniel; Cabaleri, Nora Graciela; Gallego, Oscar Florencio; Armella, Claudia; Cagnoni, Mariana Celina; Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments; Society for Sedimentary Geology; Palaios; 31; 9; 9-2016; 405-420
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