Morphological diversity and discrimination tools of the non-marine ostracod Cypridopsis silvestrii across temporal and spatial scales from Patagonia

Geometric morphometric methods are powerful tools to discriminate between closely related ostracods taxa as well as to study the relationship between their morphological variations, taxonomy and paleoecology. In this study, valve outline analysis allows the discrimination between the non-marine ostr...

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Detalles Bibliográficos
Autores principales: Ramos, Lorena Yésica, Perez, Alejandra Patricia, Coviaga, Corina Anabel, Schwalb, Antje, Ariztegui, Daniel, Alperín, Marta Inés, Cusminsky, Gabriela Catalina
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Ciencias Naturales
Paleontología
Cypridopsis silvestrii
Morphological variability
Ostracoda
Patagonia
Valve outline analysis
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/131339
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-131339
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Paleontología
Cypridopsis silvestrii
Morphological variability
Ostracoda
Patagonia
Valve outline analysis
spellingShingle Ciencias Naturales
Paleontología
Cypridopsis silvestrii
Morphological variability
Ostracoda
Patagonia
Valve outline analysis
Ramos, Lorena Yésica
Perez, Alejandra Patricia
Coviaga, Corina Anabel
Schwalb, Antje
Ariztegui, Daniel
Alperín, Marta Inés
Cusminsky, Gabriela Catalina
Morphological diversity and discrimination tools of the non-marine ostracod Cypridopsis silvestrii across temporal and spatial scales from Patagonia
topic_facet Ciencias Naturales
Paleontología
Cypridopsis silvestrii
Morphological variability
Ostracoda
Patagonia
Valve outline analysis
description Geometric morphometric methods are powerful tools to discriminate between closely related ostracods taxa as well as to study the relationship between their morphological variations, taxonomy and paleoecology. In this study, valve outline analysis allows the discrimination between the non-marine ostracod C. silvestrii and R. whatleyi juveniles, pointing out differences in the posterior valve area and surface ornamentation. Modern female specimens of C. silvestrii from 23 sites located in a spatial transect (41 to 51 °S) exhibited extensive morphological variability, on the basis of which three morphotypes (acuminated, transitional, subtruncated) were determined. Multivariate analyses showed that acuminated and transitional shapes are not arranged in groups but the subtruncated morphotype, previously described as E. cecryphalium, seems to be associated with low water conductivity (372 µS cm-1), dominant cold (5 oC) and windy (8.6 m s-1) climatic conditions. The fossil cluster which included nine cores spanning the last 15.6 kyr, only covered acuminated and transitional shapes, which may indicate that these lineages might be older than the subtruncated morphotype. In addition, morphological differences between reproduction modes suggested that parthenogenetic females exhibit de posterior margin more acuminate than sexual females. These results set the ground for more precise ecological and paleoenvironmental studies in Patagonia.
format Articulo
Articulo
author Ramos, Lorena Yésica
Perez, Alejandra Patricia
Coviaga, Corina Anabel
Schwalb, Antje
Ariztegui, Daniel
Alperín, Marta Inés
Cusminsky, Gabriela Catalina
author_facet Ramos, Lorena Yésica
Perez, Alejandra Patricia
Coviaga, Corina Anabel
Schwalb, Antje
Ariztegui, Daniel
Alperín, Marta Inés
Cusminsky, Gabriela Catalina
author_sort Ramos, Lorena Yésica
title Morphological diversity and discrimination tools of the non-marine ostracod Cypridopsis silvestrii across temporal and spatial scales from Patagonia
title_short Morphological diversity and discrimination tools of the non-marine ostracod Cypridopsis silvestrii across temporal and spatial scales from Patagonia
title_full Morphological diversity and discrimination tools of the non-marine ostracod Cypridopsis silvestrii across temporal and spatial scales from Patagonia
title_fullStr Morphological diversity and discrimination tools of the non-marine ostracod Cypridopsis silvestrii across temporal and spatial scales from Patagonia
title_full_unstemmed Morphological diversity and discrimination tools of the non-marine ostracod Cypridopsis silvestrii across temporal and spatial scales from Patagonia
title_sort morphological diversity and discrimination tools of the non-marine ostracod cypridopsis silvestrii across temporal and spatial scales from patagonia
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/131339
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