DOCSLIB.ORG

Ostracodes Da Formação Quiricó, Cretáceo Inferior, Bacia Do São Francisco, Estado De Minas Gerais, Região Sudeste Do Brasil

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Ostracodes Da Formação Quiricó, Cretáceo Inferior, Bacia Do São Francisco, Estado De Minas Gerais, Região Sudeste Do Brasil UNIVERSIDADE BRASÍLIA- UnB INSTITUTO DE GEOCIÊNCIAS-IG OSTRACODES DA FORMAÇÃO QUIRICÓ, CRETÁCEO INFERIOR, BACIA DO SÃO FRANCISCO, ESTADO DE MINAS GERAIS, REGIÃO SUDESTE DO BRASIL Dissertação de Mestrado N° 397 Amanda Moreira Leite Brasília-DF, junho de 2017 UNIVERSIDADE BRASÍLIA- UnB INSTITUTO DE GEOCIÊNCIAS-IG Amanda Moreira Leite OSTRACODES DA FORMAÇÃO QUIRICÓ, CRETÁCEO INFERIOR, BACIA DO SÃO FRANCISCO, ESTADO DE MINAS GERAIS, BRASIL Dissertação submetida à Coordenação do Programa de Pós-graduação em Geologia, Universidade de Brasília, como requisito parcial para obtenção de grau de Mestre em Geologia. Área de Concentração: Bioestratigrafia e Paleoecologia Orientador: Prof. Dr. Dermeval Aparecido do Carmo Comissão Examinadora Prof. Dr. Dermeval Aparecido do Carmo (Orientador – IG/UnB) Prof. Dr. Cristianini Trescastro Bergue (UFRGS) – Membro Externo Prof. Dr. Ricardo Lourenço Pinto (IG/UnB) – Membro Interno Brasília-DF, 2017 OSTRACODES DA FORMAÇÃO QUIRICÓ, CRETÁCEO INFERIOR, BACIA DO SÃO FRANCISCO, ESTADO DE MINAS GERAIS, BRASIL Dissertação submetida à Coordenação do Programa de Pós Graduação em Geologia, Universidade de Brasília, como requisito parcial para obtenção de grau de Mestre em Geologia. Área de Concentração: Bioestratigrafia e Paleoecologia. Orientador: Prof. Dr. Dermeval Aparecido do Carmo. Brasília – DF, BANCA EXAMINADORA Prof. Dr. Dermeval Aparecido do Carmo (Orientador) Universidade de Brasília UnB Prof. Dr. Cristianini Trescastro Bergue – Membro Externo Universidade Federal do Rio Grande do Sul URFGS Prof. Dr. Ricardo Lourenço Pinto – Membro Interno Universidade de Brasília UnB Brasília-DF, 2017 DEDICATÓRIA Dedico este trabalho à minha família, especialmente à Mariza e ao Guilherme. v AGRADECIMENTOS Agradeço à toda a equipe do Laboratório de Micropaleontologia, pela amizade, apoio e ajuda diariamente. Ao Prof. Dr. Ricardo Lourenço Pinto, pelas discussões e considerações construtivas, bem como por me introduzir ao estudo de ostracodes. Ao Doutor Lucas S. Antonietto por ter ensinado a obter imagens MEV no Laboratório de Micropaleontologia. Ao Geólogo Matheus Denezine, Mestre Rodrigo R. Adorno, Profa. Edi Mendes Guimarães e Profa. Lucieth Cruz Vieira, pelas participações especiais nos trabalhos de campo. Ao Laboratório de Microscopia Eletrônica do Instituto de Ciências Biológicas da Universidade de Brasília pelos serviços de metalização do material ilustrado. Em especial agradeço aos meus pais, familiares e amigos, por todo o apoio. Agradeço a minha Avó Mariza, por estar presente em cada etapa, me incentivando e apoiando, incondicionalmente. Também sou grata ao Guilherme Miranda Caixeta, por todo o carinho e companheirismo em todos os momentos, contribuindo durante os trabalhos de campo, execução e término deste trabalho. À Fundação de Apoio à Pesquisa do Distrito Federal (FapDF) pela bolsa de mestrado prevista no Edital ProMD/UnB/FAPDF – Bolsas Mestrado e Doutorado 2015/2016, e pelo apoio financeiro, principalmente nos trabalhos de campo, Edital 03/2015 – Demanda Espontânea, projeto “Micropaleontologia da Formação Quiricó, Cretáceo Inferior da bacia do São Francisco, Estado de Minas Gerais”. vi RESUMO Dezesseis espécies de ostracodes foram recuperadas em amostras da Formação Quiricó: Harbinia alta, Harbinia aff. Harbinia angulata, Harbinia aff. Harbinia crepata, Harbinia aff. Harbinia salitrensis, Harbinia symmetrica, Brasacypris fulfaroi, Brasacypris ovum, Cypridea conjugata, Cypridea hystrix, Cypridea infima, Cypridea jequiensis, Neuquenocypris antiqua, Penthesilenula martinsi, Penthesilenula pintoi sp. nov., Alicenula longiformis sp. nov. e Timiriasevia sanfranciscanensis sp. nov. As amostras estudadas são provenientes de três afloramentos no Estado de Minas Gerais: Fazenda Tereza, Município de João Pinheiro; às margens do ribeirão São José e ribeirão Quiricó, Fazenda São José, Município de Presidente Olegário. As associações de ostracodes permitem correlacionar a Formação Quiricó com diversas bacias continentais brasileiras: Grajaú, Araripe, Potiguar, Jatobá, Sergipe-Alagoas, Recôncavo, Cedro, Paraná e Tucano. Adicionalmente, é possível correlacionar esta Formação ao Barremiano das bacias do Gabão e Congo, na África; Albiano, da bacia Austral, e Aptiano, da Formação D-129, da Argentina. As espécies de ostracodes recuperadas são tipicamente límnicas. No afloramento da Fazenda Tereza, há uma maior riqueza de gêneros e espécies de ostracodes, que associadas a oogônios de carófitas e a natureza sedimentar, indica a presença de paleoambiente lacustre com pH elevado e baixa salinidade. No afloramento ás margens do ribeirão São José há uma dominância de espécies do Gênero Harbinia, que associadas a natureza sedimentar encontrada, indica a presença de paleoambiente dominados por lagos com água salobra e hipersalina. No afloramento às margens do ribeirão Quiricó, há uma riqueza de espécies maior, quando comparado com o ribeirão São José, em um único horizonte, bem como a presença de oogônio carófita, que associado a natureza sedimentar, indica a presença de paleoambiente lacustre, com pH elevado e baixa salinidade. De acordo com a análise dos afloramentos estudados, assim como trabalhos anteriores, os sedimentos da Formação Quiricó foram depositados em sistema lacustre, especialmente na localidade do ribeirão São José há uma elevação na salinidade. Palavras-Chave: Cretáceo Inferior, Formação Quiricó, taxonomia, distribuição estratigráfica, paleoecologia. vii ABSTRACT Sixteen species of ostracods were recovered in samples from the Quiricó Formation: Harbinia alta, Harbinia aff. Harbinia angulata, Harbinia aff. Harbinia crepata, Harbinia aff. Harbinia salitrensis, Harbinia symmetrica, Brasacypris fulfaroi, Brasacypris ovum, Cypridea conjugata, Cypridea hystrix, Cypridea infima, Cypridea jequiensis, Neuquenocypris antiqua, Penthesilenula martinsi, Penthesilenula pintoi new species, Alicenula longiformis new species e Timiriasevia sanfranciscanensis new species. The studied samples are from three outcrops from Minas Gerais State: Tereza Farm in João Pinheiro County; by the shores of São José river and Quiricó river, in São José Farm, Presidente Olegário County. The species association allow the correlation between Quiricó Formation with several other continental basins in Brazil: Grajaú, Araripe, Potiguar, Jatobá, Sergipe-Alagoas, Recôncavo, Cedro, Paraná and Tucano. Additionally, it is possible to correlate this Formation with the Berremian of Gabão and Congo basins, in Africa; Albian of Austral basin and Aptian of D-129 Formation, from Argentina. The species of ostracods are typically limnic. In the Tereza Farm outcrop, there is a larger diversity of genera and species of ostracods, which associated with carophyte oogonium and with the sediments found, indicate a lacustrine paleoenvironment, with an elevated pH and low salinity. In the outcrop by the shore of São José river, there is a dominance of species belonging to the Harbinia genus, which associated with the sediments found, indicate a lacustrine paleoenvironment, dominated by saline and hypersaline waters. In the outcrop by the shores of Quiricó river, there is a large diversity of genera and species of ostracods, when compared to the São José river, as well as the presence of carophyte oogonium, which associated with the sediments found, indicate a lacustrine paleoenvironment, with an elevated pH and low salinity. According to the analysis of the studied outcrops, associated with previous works, the sediments from the Quiricó Formation were deposited in continental lacustrine environments, especially in the locality of the São José river, there is an elevation in salinity. Key-words: Lower Cretaceous, Quiricó Formation, taxonomy, stratigraphic distribution, paleoecology. viii SUMÁRIO DEDICATÓRIA......................................................................................................................... -iv - AGRADECIMENTOS ............................................................................................................... .–v- RESUMO..................................................................................................................................–vi- ABSTRACT..............................................................................................................................-vii- 1. INTRODUÇÃO ............................................................................................................................................. 1 1.1. LOCALIZAÇÃO ....................................................................................................................... 2 2. BACIA DO SÃO FRANCISCO .................................................................................................................... 3 2.1. Grupo Areado ....................................................................................................................... 4 2.2. Histórico e evolução do Grupo Areado .................................................................................... 7 3. METODOLOGIA........................................................................................................................................ 10 3.1. Metodologia para microfósseis.......................................................................................................... 10 3.2. Metodologia para macrofósseis ......................................................................................................... 11 3.3. Metodologia para análise de carbono orgânito total ......................................................................
Load more

Recommended publications
  • Volume 2, Chapter 10-2: Arthropods: Crustacea
    Glime, J. M. 2017. Arthropods: Crustacea – Ostracoda and Amphipoda. Chapt. 10-2. In: Glime, J. M. Bryophyte Ecology. Volume 2. 10-2-1 Bryological Interaction. Ebook sponsored by Michigan Technological University and the International Association of Bryologists. Last updated 19 July 2020 and available at <http://digitalcommons.mtu.edu/bryophyte-ecology2/>. CHAPTER 10-2 ARTHROPODS: CRUSTACEA – OSTRACODA AND AMPHPODA TABLE OF CONTENTS CLASS OSTRACODA ..................................................................................................................................... 10-2-2 Adaptations ................................................................................................................................................ 10-2-3 Swimming to Crawling ....................................................................................................................... 10-2-3 Reproduction ....................................................................................................................................... 10-2-3 Habitats ...................................................................................................................................................... 10-2-3 Terrestrial ............................................................................................................................................ 10-2-3 Peat Bogs ............................................................................................................................................ 10-2-4 Aquatic ...............................................................................................................................................
    [Show full text]
  • Crustacea, Ostracoda), from Christmas Island (Indian Ocean) with Some Considerations on the Morphological Evolution of Ancient Asexuals
    Belg. J. Zool., 141 (2) : 55-74 July 2011 Description of a new genus and two new species of Darwinulidae (Crustacea, Ostracoda), from Christmas Island (Indian Ocean) with some considerations on the morphological evolution of ancient asexuals Giampaolo Rossetti1*, Ricardo L. Pinto 2 & Koen Martens 3 1 University of Panna, Department of Enviromnental Sciences, Viale G.P. Usberti 33 A, 1-43100 Panna, Italy 2 University of Brasilia, Institute of Geosciences, Laboratory of Micropaleontology, ICC, Campus Universitário Darcy Ribeiro Asa Norte, 70910-900 Brasilia, DF, Brazil 3 Royal Belgian Institute of Natural Sciences, Freshwater Biology, Vautierstraat 29, B-1000 Brussels, Belgium, and University of Ghent, Department of Biology, K.L. Ledeganckstraat 35, B-9000 Gent, Belgimn * Conesponding author: Giampaolo Rossetti. Mail: giampaolo.rosscttin unipr.it ABSTRACT. Darwinulidae is believed to be one of the few metazoan taxa in which fully asexual reproduction might have persisted for millions of years. Although rare males in a single darwinulid species have recently been found, they may be non-functional atavisms. The representatives of this family are characterized by a slow evolutionary rate, resulting in a conservative morphology in the different lineages over long time frames and across wide geographic ranges. Differences between species and genera, although often based on small details of valve morphology and chaetotaxy, are nevertheless well-recognizable. Five recent genera ( Darwinula, Alicenula, Vestcdemilct, Penthesilemila and Microdarwimda) and about 35 living species, including also those left in open nomenclature, are included in this family. Previous phylogenetic analyses using both morphological characters and molecular data confirmed that the five genera are good phyletic units.
    [Show full text]
  • Ostracoda, Crustacea) in Turkey
    LIMNOFISH-Journal of Limnology and Freshwater Fisheries Research 5(1): 47-59 (2019) Fossil and Recent Distribution and Ecology of Ancient Asexual Ostracod Darwinula stevensoni (Ostracoda, Crustacea) in Turkey Mehmet YAVUZATMACA * , Okan KÜLKÖYLÜOĞLU Department of Biology, Faculty of Arts and Science, Bolu Abant İzzet Baysal University, Turkey ABSTRACT ARTICLE INFO In order to determine distribution, habitat and ecological preferences of RESEARCH ARTICLE Darwinula stevensoni, data gathered from 102 samples collected in Turkey between 2000 and 2017 was evaluated. A total of 1786 individuals of D. Received : 28.08.2018 stevensoni were reported from eight different aquatic habitats in 14 provinces in Revised : 21.10.2018 six of seven geographical regions of Turkey. Although there are plenty of samples Accepted : 30.10.2018 from Central Anatolia Region, recent form of the species was not encountered. Unlike recent, fossil forms of species were encountered in all geographic regions Published : 25.04.2019 except Southeastern Anatolia. The oldest fossil record in Turkey was reported from the Miocene period (ca 23 mya). Species occurred in all climatic seasons in DOI:10.17216/LimnoFish.455722 Turkey. D. stevensoni showed high optimum and tolerance levels to different ecological variables. Results showed a positive and negative significant * CORRESPONDING AUTHOR correlations of the species with pH (P<0.05) and elevation (P<0.01), respectively. [email protected] It seems that the ecological preferences of the species are much wider than Phone : +90 537 769 46 28 previously known. Our results suggest that if D. stevensoni is used to estimate past and present environmental conditions, attention and care should be paid on its ecology and distribution.
    [Show full text]
  • On Two New Species of Darwinula BRADY & ROBERTSON, 1885
    BULLETIN DE L'INSTITUT ROYAL DES SCIENCES NATURELLES DE BELGIQUE, BIOLOGIE, 67: 57-66, 1997 '' BULLETIN VAN HET KONrNKLIJK BELGISCH INSTITUUT VOOR NATUURWETENSCHAPPEN, BIOLOGIE, 67: 57-66, 1997 On two new species of Darwinula BRADY & ROBERTSON, 1885 (Crustacea, Ostracoda) from South African dolomitic springs by Koen MARTENS & Giampaolo ROSSETTI Abstract 1968 (represented by only one extant spec1es, M. zimmeri) and the nominate genus Danvinula BRADY Two new Recent darwinulid ostrac ds (Darwinu/a molopoensis & ROB ERTSON, 1885. SOHN (1987) reported 23 living spec. nov. and D. inversa spec. nov.) are described from dolomitic species and 2 subspecies for Darwinula (D. dicastrii springs in the former North West Province (the former Transvaal), LOFFLER was missing from this list); amon·g these RSA. The two new taxa can be distinguished by both soft part species, only D. stevensoni can be considered truly and valve morphology. Darwinula molopoensis spec. nov. belongs ubiquitous. to the D. africana lineage (with D. incon5picua KuE as its Except for a few papers on D. stevensoni (McGREGOR & closest relative), D. inversa spec. nov. belongs into the D. serricaudata group. The synonymy of D. serricaudata espinosa WETZEL 1968, MCGREGOR 1969; RANTA, 1979), little is PINTO & KOTZIAN, 1961 with D. serricaudata KLIE, 1935 is known on the biology and ecology of the Darwinuloidea. discussed. Also taxonomic relationships within this group remain Key words: Ostracods, Darwinu/a mo/opoensis spec. nov., " "unclear, in s'pite of valuable contributions by DAN IELOPOL Darwinula inversa spec. nov., morphology, taxonomy, ancient (1968, 1970, 1980). Indeed, the morphological uniformity asexuals, parthenogenesis, biodiversity. of the Darwinuloidea makes it difficult to single out unequivocal characters suitable for discriminating species and genera.
    [Show full text]
  • Crustacea: Ostracoda) De Pozas Temporales
    Heterocypris bosniaca (Petkowski et al., 2000): Ecología y ontogenia de un ostrácodo (Crustacea: Ostracoda) de pozas temporales. ESIS OCTORAL T D Josep Antoni Aguilar Alberola Departament de Microbiologia i Ecologia Universitat de València Programa de doctorat en Biodiversitat i Biologia Evolutiva Heterocypris bosniaca (Petkowski et al., 2000): Ecología y ontogenia de un ostrácodo (Crustacea: Ostracoda) de pozas temporales. Tesis doctoral presentada por Josep Antoni Aguilar Alberola 2013 Dirigida por Francesc Mesquita Joanes Imagen de cubierta: Vista lateral de la fase eclosionadora de Heterocypris bosniaca. Más detalles en el capítulo V. Tesis titulada "Heterocypris bosniaca (Petkowski et al., 2000): Ecología y ontogenia de un ostrácodo (Crustacea: Ostracoda) de pozas temporales" presentada por JOSEP ANTONI AGUILAR ALBEROLA para optar al grado de Doctor en Ciencias Biológicas por la Universitat de València. Firmado: Josep Antoni Aguilar Alberola Tesis dirigida por el Doctor en Ciencias Biológicas por la Universitat de València, FRANCESC MESQUITA JOANES. Firmado: F. Mesquita i Joanes Profesor Titular de Ecología Universitat de València A Laura, Paco, i la meua família Resumen Los ostrácodos son un grupo de pequeños crustáceos con amplia distribución mundial, cuyo cuerpo está protegido por dos valvas laterales que suelen preservarse con facilidad en el sedimento. En el presente trabajo se muestra la primera cita del ostrácodo Heterocypris bosniaca Petkowski, Scharf y Keyser, 2000 para la Península Ibérica. Se trata de una especie de cipridoideo muy poco conocida que habita pozas de aguas temporales. Se descubrió el año 2000 en Bosnia y desde entonces solo se ha reportado su presencia en Israel (2004) y en Valencia (presente trabajo).
    [Show full text]
  • Mikro-Originale Sammlung BGR/LBEG Hannover
    Mikro-Originale Sammlung BGR/LBEG Hannover Al-Abawi, T. (1973) Miozäne Foraminiferen aus dem NE-Irak. (Miocene foraminifera from the NE Iraq). N.Jb. Geol. Paläont. Abh., 144, 1: 1-23, 9 Abb.; Stuttgart. ? Dorothia sp. Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 55 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 47 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 48 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 49 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 50 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 51 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 52 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 62 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 54 Belegexemplar Ammonia acuta n. sp. Abb. 5, Fig. 42c Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 56 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 57 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 58 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 59 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 60 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 61 Belegexemplar Ammonia acuta n. sp. Abb. 6, Fig. 53 Belegexemplar Ammonia acuta n. sp. Abb. 5, Fig. 35c Belegexemplar Ammonia acuta n. sp. Abb. 5, Fig. 27a-c Holotypus Ammonia acuta n. sp. Abb. 5, Fig. 28a-c Paratypus Ammonia acuta n. sp. Abb. 5, Fig. 29a-c Paratypus Ammonia acuta n. sp. Abb. 5, Fig. 30a-c Belegexemplar Ammonia acuta n. sp. Abb. 5, Fig. 31c Belegexemplar Ammonia acuta n. sp. Abb. 5, Fig. 32c Belegexemplar Ammonia acuta n.
    [Show full text]
  • Ostracod Assemblages in the Frasassi Caves and Adjacent Sulfidic Spring and Sentino River in the Northeastern Apennines of Italy
    D.E. Peterson, K.L. Finger, S. Iepure, S. Mariani, A. Montanari, and T. Namiotko – Ostracod assemblages in the Frasassi Caves and adjacent sulfidic spring and Sentino River in the northeastern Apennines of Italy. Journal of Cave and Karst Studies, v. 75, no. 1, p. 11– 27. DOI: 10.4311/2011PA0230 OSTRACOD ASSEMBLAGES IN THE FRASASSI CAVES AND ADJACENT SULFIDIC SPRING AND SENTINO RIVER IN THE NORTHEASTERN APENNINES OF ITALY DAWN E. PETERSON1,KENNETH L. FINGER1*,SANDA IEPURE2,SANDRO MARIANI3, ALESSANDRO MONTANARI4, AND TADEUSZ NAMIOTKO5 Abstract: Rich, diverse assemblages comprising a total (live + dead) of twenty-one ostracod species belonging to fifteen genera were recovered from phreatic waters of the hypogenic Frasassi Cave system and the adjacent Frasassi sulfidic spring and Sentino River in the Marche region of the northeastern Apennines of Italy. Specimens were recovered from ten sites, eight of which were in the phreatic waters of the cave system and sampled at different times of the year over a period of five years. Approximately 6900 specimens were recovered, the vast majority of which were disarticulated valves; live ostracods were also collected. The most abundant species in the sulfidic spring and Sentino River were Prionocypris zenkeri, Herpetocypris chevreuxi,andCypridopsis vidua, while the phreatic waters of the cave system were dominated by two putatively new stygobitic species of Mixtacandona and Pseudolimnocythere and a species that was also abundant in the sulfidic spring, Fabaeformiscandona ex gr. F. fabaeformis. Pseudocandona ex gr. P. eremita, likely another new stygobitic species, is recorded for the first time in Italy. The relatively high diversity of the ostracod assemblages at Frasassi could be attributed to the heterogeneity of groundwater and associated habitats or to niche partitioning promoted by the creation of a chemoautotrophic ecosystem based on sulfur-oxidizing bacteria.
    [Show full text]
  • Crustacea, Ostracoda), from Christmas Island (Indian Ocean) with Some Considerations on the Morphological Evolution of Ancient Asexuals
    Belg. J. Zool., 141 (2) : 55-74 July 2011 Description of a new genus and two new species of Darwinulidae (Crustacea, Ostracoda), from Christmas Island (Indian Ocean) with some considerations on the morphological evolution of ancient asexuals Giampaolo Rossetti1*, Ricardo L. Pinto2 & Koen Martens3 1 University of Parma, Department of Environmental Sciences, Viale G.P. Usberti 33A, I-43100 Parma, Italy 2 University of Brasília, Institute of Geosciences, Laboratory of Micropaleontology, ICC, Campus Universitário Darcy Ribeiro Asa Norte, 70910-900 Brasilia, DF, Brazil 3 Royal Belgian Institute of Natural Sciences, Freshwater Biology, Vautierstraat 29, B-1000 Brussels, Belgium, and University of Ghent, Department of Biology, K.L. Ledeganckstraat 35, B-9000 Gent, Belgium * Corresponding author: Giampaolo Rossetti. Mail: [email protected] ABSTRACT. Darwinulidae is believed to be one of the few metazoan taxa in which fully asexual reproduction might have persisted for millions of years. Although rare males in a single darwinulid species have recently been found, they may be non-functional atavisms. The representatives of this family are characterized by a slow evolutionary rate, resulting in a conservative morphology in the different lineages over long time frames and across wide geographic ranges. Differences between species and genera, although often based on small details of valve morphology and chaetotaxy, are nevertheless well-recognizable. Five recent genera (Darwinula, Alicenula, Vestalenula, Penthesilenula and Microdarwinula) and about 35 living species, including also those left in open nomenclature, are included in this family. Previous phylogenetic analyses using both morphological characters and molecular data confirmed that the five genera are good phyletic units. Here, we report on the results of a study on darwinulid ostracods from Christmas Island (Indian Ocean).
    [Show full text]
  • 62 Anuário Do Instituto De Geociências
    Anuário do Instituto de Geociências - UFRJ www.anuario.igeo.ufrj.br A Fauna da Formação Brejo Santo, Neojurássico da Bacia do Araripe, Brasil: Interpretações Paleoambientais The Brejo Santo Formation Fauna, Neojurassic from Araripe Basin, Brazil: Paleoenvironmental Interpretations Bruno Gonçalves Vieira de Melo & Ismar de Souza Carvalho Universidade Federal do Rio de Janeiro, Centro de Ciências Matemáticas e da Natureza, Instituto de Geociências, Departamento de Geologia, Avenida Athos da Silveira Ramos, 274, Bloco F, Ilha do Fundão – Cidade Universitária, Rio de Janeiro, RJ, 21949-900, Brasil E-mails: [email protected]; [email protected] Recebido em: 12/09/2017 Aprovado em:10/10/2017 DOI: http://dx.doi.org/10.11137/2017_3_62_74 Resumo A Bacia do Araripe teve sua origem e evolução relacionadas aos eventos tectônicos que culminaram com o rifteamento do Gondwana e abertura do oceano Atlântico Sul. Os depósitos do Neojurássico da bacia estão inseridos na Tectonossequência Pré-Rifte e compreendem a Formação Brejo Santo. Os macrofósseis e microfósseis incluem peixes Mawsonia gigas e Lepidotes sp., Crocodyliformes, Dinosauria, e invertebrados como ostracodes, conchostráceos, gastrópode, biválvio, além de icnofósseis. A associação fossilífera, aliada às observações sedimentológicas dos aloramentos, torna possível caracterizar o ambiente deposicional. O predomínio de camadas lutíticas vermelhasred beds) ( evidencia a deposição em corpos d’água rasos, em condições oxidantes, de áreas alagadas da planície de inundação, em clima árido, associados a momentos esporádicos de inundação luvial. A ocorrência de níveis carbonáticos e a diversidade de ostracodes mixohalinos (citeráceos), sugerem que as áreas alagadas eram caracterizadas por águas salobras (salinidade entre 1 e 24,7 %), temperadas ou quentes e com pH alcalino.
    [Show full text]
  • Early Carboniferous (Late Tournaisian–Early Viséan) Ostracods from the Ballagan Formation, Central Scotland, UK
    Journal of Micropalaeontology, 24: 77–94. 0262-821X/05 $15.00 2005 The Micropalaeontological Society Early Carboniferous (Late Tournaisian–Early Viséan) ostracods from the Ballagan Formation, central Scotland, UK MARK WILLIAMS1, 2, MICHAEL STEPHENSON1, IAN P. WILKINSON1, MELANIE J. LENG3 & C. GILES MILLER4 1 British Geological Survey, Keyworth, Nottingham NG12 5GG, UK. 2Current address: British Antarctic Survey, Geological Sciences Division, High Cross, Madingley Road, Cambridge CB3 0ET, UK (e-mail: [email protected]. uk). 3NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, Nottingham NG12 5GG, UK. 4Natural History Museum, Cromwell Road, South Kensington, London SW7 5BD, UK. ABSTRACT – The Ballagan Formation (Late Tournaisian–Early Viséan) of central Scotland yields an ostracod fauna of 14 species in ten genera, namely Beyrichiopsis, Cavellina, Glyptolichvinella, Glyptopleura, Knoxiella, Paraparchites, Sansabella, Shemonaella, Silenites and Sulcella. The ostracods, in combination with palynomorphs, are important biostratigraphical indices for correlating the rock sequences, where other means of correlation, especially goniatites, conodonts, foraminifera, brachiopods or corals are absent. Stratigraphical distribution of the ostracods, calibrated with well-established palynomorph biozones, identifies three informally defined intervals: a sub-CM palynomorph Biozone interval with poor ostracod assemblages including Shemonaella scotoburdigalensis; a succeeding interval within the CM palynomorph Biozone where Cavellina coela,
    [Show full text]
  • Article Is Available Online Pod Morphology Before and After the Permian Mass Extinction At
    Biogeosciences, 15, 5489–5502, 2018 https://doi.org/10.5194/bg-15-5489-2018 © Author(s) 2018. This work is distributed under the Creative Commons Attribution 4.0 License. Significance of climate and hydrochemistry on shape variation – a case study on Neotropical cytheroidean Ostracoda Claudia Wrozyna1,2, Thomas A. Neubauer3,4, Juliane Meyer1, Maria Ines F. Ramos5, and Werner E. Piller1 1Institute of Earth Sciences, NAWI Graz Geocenter, University of Graz, 8010 Graz, Austria 2Institute for Geophysics and Geology, University of Leipzig, 04109 Leipzig, Germany 3Department of Animal Ecology & Systematics, Justus Liebig University, 35392 Giessen, Germany 4Naturalis Biodiversity Center, Leiden, 2300 RA, the Netherlands 5Coordenação de Ciências da Terra e Ecologia, Museu Paraense Emílio Goeldi, 66077-830, Brazil Correspondence: Claudia Wrozyna ([email protected]) Received: 13 September 2017 – Discussion started: 10 November 2017 Revised: 21 August 2018 – Accepted: 24 August 2018 – Published: 14 September 2018 Abstract. How environmental change affects a species’ phe- ality, annual precipitation and chloride and sulfate concen- notype is crucial not only for taxonomy and biodiversity as- trations. We suggest that increased temperature seasonality sessments but also for its application as a palaeo-ecological slowed down growth rates during colder months, potentially and ecological indicator. Previous investigations addressing triggering the development of shortened valves with well- the impact of the climate and hydrochemical regime on os- developed brood pouches. Differences in chloride and sul- tracod valve morphology have yielded contrasting results. fate concentrations, related to fluctuations in precipitation, Frequently identified ecological factors influencing carapace are considered to affect valve development via controlling shape are salinity, cation, sulfate concentrations, and alkalin- osmoregulation and carapace calcification.
    [Show full text]
  • Biodiversity and Society Understanding Connections, Adapting to Change
    Abstracts cover:Layout 1 2009/09/28 8:47 AM Page 1 BIODIVERSITY AND SOCIETY UNDERSTANDING CONNECTIONS, ADAPTING TO CHANGE A B S T R A C T S DIVERSITAS Open Science Conference 2 13 – 16 October 2009 CAPE TOWN SOUTH AFRICA CONTENTS w w w. d i v e r s i t a s - i n t e r n a t i o n a l . o r g NB: This is an interactive programme. To go to an abstract, click on the letter corresponding to the initial of the first author’s last name. To come back to this Content page, click on “Back to content” on lower right corner of each page. Contents Plenary speakers Symposiums overview Symposiums A-D E-H I-L M-O P-Z Orals A-D E-H I-L M-O P-Z Posters A-D E-H I-L M-O P-Z Plenary speakers • • • • 3 • • • • Plenary speakers Brown George, Lavelle Patrick, Jackson Louise, Brussaard Lijbert Unearthing below-ground biodiversity: Management and conservation implications Embrapa Florestas, Ecology, Brazil, [email protected] Plenary session Soils are living entities and the home of a vast diversity of organisms, with a broad range of body sizes (from bacteria to earthworms), feeding strategies, and life habits. The great spatial and temporal variability in soils promotes a complex niche structure and an incredibly dense packing of species: a typical healthy soil may have a few species of vertebrates, springtails and oligochaetes, dozens of species of nematodes, spiders, mites and myriapods, more than one hundred species of insects and fungi and perhaps thousands of species of bacteria and actinomycetes.
    [Show full text]