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dc.contributor.author
Armella, Matías Alberto
dc.contributor.author
Ercoli, Marcos Darío
dc.date.available
2020-01-16T21:52:09Z
dc.date.issued
2018-07
dc.identifier.citation
Armella, Matías Alberto; Ercoli, Marcos Darío; An Evaluation of the Dental Features Used to Distinguish Typotheriopsis from Pseudotypotherium (Mesotheriidae, Notoungulata): Reappraisals and Proposals Regarding Their Systematic Value; Asociación Paleontológica Argentina; Ameghiniana; 55; 5; 7-2018; 592-599
dc.identifier.issn
0002-7014
dc.identifier.uri
http://hdl.handle.net/11336/95024
dc.description.abstract
The marginal-marine, low-energy, carbonate ramp deposits of the La Tosca Member (Huitrín Formation, Barremian) in southern Mendoza Province, Argentina, bear an abundant though low-diversity macrobenthic invertebrate fauna that is scarce or absent in the outcrops of the unit in the Neuquén Province. Here we describe new taxa from the Quebrada del Gastrópodo and Ranquil 1 sections and provide taxonomic revisions for other key faunal elements. The species discussed herein are the gastropods Paleoanculosa macrochilinoides (Doello-Jurado), Provalvata minor sp. nov., and Provalvata maior sp. nov., the bivalve Rutitrigonia cintarojensis sp. nov., and the serpulid Parsimonia aff. laevis (Goldfu?). Additionally, in order to analyze the observed changes in faunal content along the studied section, a paleoecological analysis was performed combining estimation of diversity indices and the paleoautoecology of the fauna recorded in Quebrada del Gastrópodo. Three macrobenthic assemblages were qualitatively recognized in the field; from base to top: 1) Paleoanculosa macrochilinoides, 2) serpulid-gastropod, and 3) bivalve-serpulid assemblages. Species richness and equitability increase upwards. This trend suggests a reduction in environmental stress from bottom to top. The first two assemblages indicate settings with fluctuating environmental parameters, whilst the third points to higher environmental stability. Euryhaline taxa dominate, whilst stenohaline species are scarce or absent in the lower two thirds of the succession. The nature of the stress is interpreted herein to be mainly related to high-frequency salinity variations, especially in the first and second assemblages in which temporal deviations from euhaline to meso-brachyhaline and brachyhaline conditions are hypothesized.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Asociación Paleontológica Argentina
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Argentina
dc.subject
Sistemática
dc.subject
Neógeno tardío
dc.subject
Mesotheriinae
dc.subject
Dientes
dc.subject.classification
Paleontología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
An Evaluation of the Dental Features Used to Distinguish Typotheriopsis from Pseudotypotherium (Mesotheriidae, Notoungulata): Reappraisals and Proposals Regarding Their Systematic Value
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-10-17T16:30:37Z
dc.identifier.eissn
1851-8044
dc.journal.volume
55
dc.journal.number
5
dc.journal.pagination
592-599
dc.journal.pais
Argentina
dc.journal.ciudad
Ciudad Autónoma de Buenos Aires
dc.description.fil
Fil: Armella, Matías Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Correlación Geológica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Departamento de Geología. Cátedra Geología Estructural. Instituto Superior de Correlación Geológica; Argentina
dc.description.fil
Fil: Ercoli, Marcos Darío. Universidad Nacional de Jujuy. Instituto de Geología Minera; Argentina. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina
dc.journal.title
Ameghiniana
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/1039
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.5710/AMGH.17.07.2018.3186
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