Frenguellicythere argentinensis, n. gen. and n. sp. from Holocene Deposits of the Estuary of Bahía Blanca, Buenos Aires Province, Argentina

Bertels-Psotka, Alwine; Martínez, Dina Elsa

doi:10.2307/1486121

Cited by 6 publications

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“…5, and the relative abundance of allocthonous species (only adult or juvenile forms) have been analyzed. The taxonomic identification has been discussed previously by Bertels and Martínez (1997); Bertels-Postka and Martínez (1999), and Martínez (2002 Most species recorded in this zone live in modern subtidal and intertidal areas of the inner sector of the Bahía Blanca estuary. L. variasculpta and P. parallela abound within both channel sediment (at 2-4 m depth) and tidal flat areas but are more abundant in the latter.…”

Section: Ostracodsmentioning

confidence: 84%

Submarine evidence of Holocene sea-level fluctuations in the Bahía Blanca estuary, Argentina

Gómez

Martínez

Borel

et al. 2005

Journal of South American Earth Sciences

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Section: Ostracodsmentioning

confidence: 84%

Submarine evidence of Holocene sea-level fluctuations in the Bahía Blanca estuary, Argentina

Gómez

Martínez

Borel

et al. 2005

Journal of South American Earth Sciences

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“…Ambos grupos (caparazones con apéndices y caparazones vacíos) fueron utilizados para realizar estudios cualitativos y cuantitativos. La clasificación taxonómica se realizó siguiendo la propuesta por Horne et al (2002) y bibliografía especializada (Bertels & Martínez, 1990, 1997Bertels-Psotka & Martínez, 1999;Ferrero, 2006Ferrero, , 2009Laprida, 2006;Laprida & Ballent, 2007;Laprida & Valero-Garcés, 2009;Whatley & Moguilevsky, 1975;Whatley et al, 1987Whatley et al, , 1988aWhatley et al, , 1997Whatley et al, , 1998Whatley & Boomer, 1995).…”

Section: Materials Y Métodosunclassified

Asociaciones de ostrácodos del intermareal del estuario de Bahía Blanca, Argentina

Kihn¹,

Martínez²,

Gómez³

2017

Rev. bras. paleontol.

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-INTERTIDAL OSTRACODE ASSEMBLAGES FROM THE ESTUARY OF BAHÍA BLANCA, ARGENTINA.The results of qualitative and quantitative analyses applied to the assemblages of ostracods recovered from bottom sediments are presented. The samples come from Puerto Rosales, Bahía Blanca estuary, Argentina. Seasonal sampling was performed along a transect perpendicular to the intertidal, from the lower to the upper intertidal. In the lower and upper intertidal the species Loxocythere variasculpta and Callistocythere nucleoperiscum are most abundant; the species Neocytherideis ruidis, Minicythere argentinensis, Cyprideis salebrosa hartmanni and Cyprideis multidentata are also present. In the upper intertidal was recovered only C. s. hartmanni. The qualitative and quantitative variations of the ostracod assemblages can be related to topography, sedimentology, vegetation and salinity variations. The results of this study are of importance in the interpretation of the environments recorded during the Quaternary, since these species are also registered as fossils.Key words: ostracods, estuary, Bahía Blanca, modern analogues, Argentina.RESUMO -Apresentam-se os resultados das análises qualitativa e quantitativa aplicada às faunas de ostracodes dos sedimentos atuais. As amostras foram extraídas de Puerto Rosales, estuário de Bahía Blanca, Argentina. A amostragem sazonal foi realizada ao longo de um transecto perpendicular ao intertidal, incluindo do intertidal inferior ao superior. No intertidal inferior e superior, as espécies Loxocythere variasculpta e Callistocythere nucleoperiscum são as mais abundantes; também estão presentes as espécies Neocytherideis ruidis, Minicythere argentinensis, Cyprideis salebrosa hartmanni e Cyprideis multidentata. Na região intertidal superior C. s. hartmanni é a única espécie presente. As variações qualitativas e quantitativas dos conjuntos de ostracodes podem estar relacionadas à topografia, sedimentologia, vegetação e variações de salinidade. Os resultados deste estudo são de importância na interpretação dos ambientes registrados durante o Quaternário, uma vez que estas espécies também ocorrem como fósseis.

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“…Para la determinación específica se utilizó bibliografía local actualizada (Bertels & Martínez, 1990Bertels-Psotka & Martínez, 1999;Ferrero, 2006Ferrero, , 2009Laprida, 2006 1975; Whatley et al, 1987Whatley et al, , 1988Whatley & Cusminsky, 1995). Las fotografías fueron tomadas con microscopio electrónico de barrido Leo modelo EVO 40, del Centro Científico Tecnológico CONICET Bahía Blanca.…”

Section: Metodologíaunclassified

“…Hasta el momento, son escasos los estudios realizados sobre la ostracofauna presente en el área de Bahía Blanca; podemos mencionar los trabajos realizados por Bertels & Martínez (1990, Bertels-Psotka & Martínez (1999) y Martínez (2005). En áreas próximas al río Quequén Grande es importante el aporte de Ferrero (2006de Ferrero ( , 2009 más hacia el norte, en la cuenca del Salado, Bertels-Psotka & Laprida (1998a,b,c,d) realizaron estudios sistemáticos e interpretaciones paleoecológicas de los ostrácodos límnicos, transicionales y marinos.…”

Section: Introductionunclassified

Asociaciones de ostrácodos bentónicos actuales y del Holoceno del estuario de Bahía Blanca (Buenos Aires, Argentina): interpretaciones paleoambientales

Kihn¹,

Martínez²,

Gómez³

et al. 2017

Rev. bras. paleontol.

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-RECENT AND HOLOCENE BENTHIC OSTRACOD ASSEMBLAGES OF THE BAHIA BLANCA ESTUARY: (BUENOS AIRES, ARGENTINA): PALAEOENVIRONMENTAL INTERPRETATIONS. The study of ostracod fauna in sediment samples from present environments at the Bahía Blanca estuary led to the identification of different ostracod associations, through which it was possible to identify Holocene depositional environments. Based on the systematic analysis of the ostracods present in different core levels, a total of 11 genera represented by 13 species of benthic ostracods were identified, out of which Neocytherideis ruidis, Loxocythere variasculpta and Callistocythere litoralensis were dominant along the core. The quantitative and qualitative analysis of ostracods from the Holocene allowed us to determine the following palaeoenvironments: at the base of the core the sediments were deposited in an intertidal environment with developed mudflats; the middle sector evidenced an increase in environmental energy; and the upper portion of the core contained deposits of marshes environment with greater freshwater input. The detailed study of the benthic Ostracoda allowed to identify palaeoenvironments and to provide new evidence of negative fluctuations of the mean sea level for the Holocene.

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Frenguellicythere argentinensis, n. gen. and n. sp. from Holocene Deposits of the Estuary of Bahía Blanca, Buenos Aires Province, Argentina

Cited by 6 publications

References 0 publications

Submarine evidence of Holocene sea-level fluctuations in the Bahía Blanca estuary, Argentina

Submarine evidence of Holocene sea-level fluctuations in the Bahía Blanca estuary, Argentina

Asociaciones de ostrácodos del intermareal del estuario de Bahía Blanca, Argentina

Asociaciones de ostrácodos bentónicos actuales y del Holoceno del estuario de Bahía Blanca (Buenos Aires, Argentina): interpretaciones paleoambientales

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