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dc.contributor.author
Mancuso, Adriana Cecilia
dc.date.available
2024-10-24T13:38:49Z
dc.date.issued
2012-07-01
dc.identifier.citation
Mancuso, Adriana Cecilia; Taphonomic analysis of fish in rift lacustrine systems: Environmental indicators and implications for fish speciation; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 339 - 341; 1-7-2012; 121-131
dc.identifier.issn
0031-0182
dc.identifier.uri
http://hdl.handle.net/11336/246383
dc.description.abstract
Two rift-basin lacustrine successions (Cacheuta and Los Rastros Formations) in the Middle Triassic of Argentina were studied to test two different hypotheses: 1) fish taphonomy is useful as an indicator of environmental conditions for these two paleolakes; and 2) fish taphonomy is useful for understanding environmental effects on speciation. The fish fossils are found, in two lacustrine deposits, as isolated and disarticulated scales and cranial bones, clumps and stringers of scales, articulated body segments, and complete specimens. Four taphofacies are defined for Cacheuta specimens (Ca-A to Ca-D), and three taphofacies are defined for Los Rastros fish assemblages (LR-A to LR-C). A Principal Components Analysis was performed, with the taphonomic features supporting the seven taphofacies defined. A taphonomic model is proposed that characterizes a lacustrine-deltaic environment developed in the rift basin and identifies three sub-environments, each one with its particular fossil assemblages. The fish assemblages in the Los Rastros Formation suggest that the fishes preserved in delta-front and turbidity-current deposits (LR-B and LR-C taphofacies) were allochthonous to the lake and probably inhabited the delta plains and affluent fluvial system. In contrast, the isolated fish remains, preserved in open-lake deposits (LR-A taphofacies), likely represent both autochthonous and/or allochthonous specimens. In the Cacheuta Formation, articulated and isolated fish remains preserved in open lake deposits (Ca-A and Ca-D tafofacies), might represent autochthonous lacustrine specimens, based on the good preservation of the material. The fish remains preserved in underflow and turbidity current deposits (Ca-B and Ca-C taphofacies) were allochthonous to the lake and probably inhabited the delta plain and affluent fluvial system. The fish taphonomic study of two different rift-basin lacustrine successions allows test of the two proposed hypotheses. Fish taphonomy was useful as an indicator of environmental conditions beacuse the differences in fish preservation allowed differentiation of the sub-environments and reconstruction of the environmental conditions and dynamics of the rift lake basins. Also, fish taphonomy was useful for understanding environmental effects on speciation by characterizing the environments and dynamics that promote the development of newfish species, recognizing fish-inhabited environments, and identifying the generalist and specialist species.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Fish taphonomy
dc.subject
Triassic
dc.subject
Lacustrine environment
dc.subject
Rift basin
dc.subject
Argentina
dc.subject.classification
Otras Ciencias Naturales y Exactas
dc.subject.classification
Otras Ciencias Naturales y Exactas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Taphonomic analysis of fish in rift lacustrine systems: Environmental indicators and implications for fish speciation
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-10-10T11:52:08Z
dc.journal.volume
339 - 341
dc.journal.pagination
121-131
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Mancuso, Adriana Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.journal.title
Palaeogeography, Palaeoclimatology, Palaeoecology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.palaeo.2012.04.029
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0031018212002489
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