Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments
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...
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2016
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08831351_v31_n9_p405_Monferran http://hdl.handle.net/20.500.12110/paper_08831351_v31_n9_p405_Monferran |
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paper:paper_08831351_v31_n9_p405_Monferran2023-06-08T15:46:29Z Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments biostratigraphy brachiopod crustacean cyanobacterium fossil record Jurassic lacustrine environment microbial community paleoenvironment Argentina Bivalvia Branchiopoda Characeae Conchostraca Crustacea Cyanobacteria Ostracoda 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. Copyright © 2016, SEPM (Society for Sedimentary Geology). 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08831351_v31_n9_p405_Monferran http://hdl.handle.net/20.500.12110/paper_08831351_v31_n9_p405_Monferran |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
biostratigraphy brachiopod crustacean cyanobacterium fossil record Jurassic lacustrine environment microbial community paleoenvironment Argentina Bivalvia Branchiopoda Characeae Conchostraca Crustacea Cyanobacteria Ostracoda |
| spellingShingle |
biostratigraphy brachiopod crustacean cyanobacterium fossil record Jurassic lacustrine environment microbial community paleoenvironment Argentina Bivalvia Branchiopoda Characeae Conchostraca Crustacea Cyanobacteria Ostracoda Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments |
| topic_facet |
biostratigraphy brachiopod crustacean cyanobacterium fossil record Jurassic lacustrine environment microbial community paleoenvironment Argentina Bivalvia Branchiopoda Characeae Conchostraca Crustacea Cyanobacteria Ostracoda |
| description |
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. Copyright © 2016, SEPM (Society for Sedimentary Geology). |
| title |
Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments |
| title_short |
Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments |
| title_full |
Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments |
| title_fullStr |
Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments |
| title_full_unstemmed |
Spinicaudatans from the Upper Jurassic of Argentina and their paleoenvironments |
| title_sort |
spinicaudatans from the upper jurassic of argentina and their paleoenvironments |
| publishDate |
2016 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08831351_v31_n9_p405_Monferran http://hdl.handle.net/20.500.12110/paper_08831351_v31_n9_p405_Monferran |
| _version_ |
1768545604851466240 |