Morphotypes of the lacustrine ostracod <i>Limnocythere rionegroensis</i> Cusminsky & Whatley from Patagonia, Argentina, shaped by aquatic environments

This study describes and quantifies morphological valve traits of the ostracod <i>Limnocythere rionegroensis</i> from Patagonian steppe lakes and explores their association with lake water characteristics. Surface ornamentation was examined by scanning electron and transmitted light micr...

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Autores principales: Ramos, Lorena Yésica, Cusminsky, Gabriela Catalina, Schwalb, Antje, Alperín, Marta Inés
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Naturales
Ostracoda
Limnocythere
Ornamentation
Geometric morphometry
Patagonian steppe lakes
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/141092
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-141092
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
Ostracoda
Limnocythere
Ornamentation
Geometric morphometry
Patagonian steppe lakes
spellingShingle Ciencias Naturales
Ostracoda
Limnocythere
Ornamentation
Geometric morphometry
Patagonian steppe lakes
Ramos, Lorena Yésica
Cusminsky, Gabriela Catalina
Schwalb, Antje
Alperín, Marta Inés
Morphotypes of the lacustrine ostracod <i>Limnocythere rionegroensis</i> Cusminsky & Whatley from Patagonia, Argentina, shaped by aquatic environments
topic_facet Ciencias Naturales
Ostracoda
Limnocythere
Ornamentation
Geometric morphometry
Patagonian steppe lakes
description This study describes and quantifies morphological valve traits of the ostracod <i>Limnocythere rionegroensis</i> from Patagonian steppe lakes and explores their association with lake water characteristics. Surface ornamentation was examined by scanning electron and transmitted light microscopy, and valve size and shape were analyzed using morphometric techniques. Limnocythere rionegroensis shows remarkable variations in surface ornamentation, based on which three morphotypes (MI, MII, and MIII) were identified. Valves of morphotypes MI and MIII are larger, show slight to moderate external reticulation, and a higher shape variability, whereas MII is characterized by a very conspicuous reticulation, lower shape variability, and smaller valves. Outline analysis yielded a great shape disparity related to the dorsal margin slope. MI was found in sexual populations from euhaline to mesohaline ephemeral lake; MII occurs in parthenogenetic populations from mesohaline to oligohaline permanent or ephemeral lakes; and MIII, from both sexual and asexual populations, inhabits a broad range of environmental conditions in terms of salinity and stability. <i>Limnocythere rionegroensis</i> intraspecific variations may be caused by environmental parameters and genetic factors associated to reproductive strategies. These results contribute to the knowledge of extant <i>L. rionegroensis</i> morphological variability and provide additional clues to improve the environmental interpretation of fossil assemblages.
format Articulo
Articulo
author Ramos, Lorena Yésica
Cusminsky, Gabriela Catalina
Schwalb, Antje
Alperín, Marta Inés
author_facet Ramos, Lorena Yésica
Cusminsky, Gabriela Catalina
Schwalb, Antje
Alperín, Marta Inés
author_sort Ramos, Lorena Yésica
title Morphotypes of the lacustrine ostracod <i>Limnocythere rionegroensis</i> Cusminsky & Whatley from Patagonia, Argentina, shaped by aquatic environments
title_short Morphotypes of the lacustrine ostracod <i>Limnocythere rionegroensis</i> Cusminsky & Whatley from Patagonia, Argentina, shaped by aquatic environments
title_full Morphotypes of the lacustrine ostracod <i>Limnocythere rionegroensis</i> Cusminsky & Whatley from Patagonia, Argentina, shaped by aquatic environments
title_fullStr Morphotypes of the lacustrine ostracod <i>Limnocythere rionegroensis</i> Cusminsky & Whatley from Patagonia, Argentina, shaped by aquatic environments
title_full_unstemmed Morphotypes of the lacustrine ostracod <i>Limnocythere rionegroensis</i> Cusminsky & Whatley from Patagonia, Argentina, shaped by aquatic environments
title_sort morphotypes of the lacustrine ostracod <i>limnocythere rionegroensis</i> cusminsky & whatley from patagonia, argentina, shaped by aquatic environments
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/141092
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