New Devonian fossil localities in Bolivia

Blieck, Alain; Gagnier, Pierre-Yves; Bigey, F.P.; Edgecombe, Gregory D.; Janvier, Philippe; Loboziak, Stanislas; Rachebȩuf, P.R.; Sempéré, Thierry; Steemans, Philippe

doi:10.1016/s0895-9811(96)00015-6

Cited by 20 publications

(18 citation statements)

References 7 publications

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“…Outros registros de corais do Devoniano Inferior e Médio da América do Sul, ocorrem em estratos da Bolívia, onde além dos gêneros supramencionados foram também reconhecidos Praemichelinea e Thamnoptychia, além do endêmico Amazonadictyum, representado pela espécie A. amazonicum, descrita originalmente na Formação Maecuru da Bacia do Amazonas por Katzer (1903in Katzer, 1933, como pertencente de Pleurodictyum ( Blieck et al, 1996;Fernández-Martínez et al, 2007;Carrera et al, 2013 (Oliver Jr., 1977).…”

Section: Considerações Paleobiogeográficas Dos Corais E Briozoários Dunclassified

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Paleobiogeographic Remarks of the Devonian Corals and Bryozoans of Brazil

2017

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ResumoOs corais e briozoários devonianos brasileiros estão registrados nas bacias do Amazonas e Paraná, respectivamente nas formações Maecuru e Ponta Grossa. Na região amazônica são duas espécies de corais e oito de briozoários, enquanto na região sul e sudeste a ocorrência de ambos os grupos está limitada a citações gerais. A baixa diversidade específica e o pequeno tamanho das populações relacionam-se com limitações ecológicas, filogenéticas e preservacionais, além do número insuficiente de pesquisas específicas. Palavras-chave: Corais; Briozoários; Paleobiogeografia; Devoniano AbstractThe Devonian corals and bryozoans of Brazil are recorded in the Amazonas and Paraná basins, at Maecuru and Ponta Grossa formations, respectively. In the Maecuru unit occurs two species of corals and eight bryozoans species while at Ponta Grossa sediments only general citations of these taxa are presented. The low specific diversity and populations size are related with the ecologic, phylogenetic and preservational constraints besides insufficient number of specific searches.

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Section: Considerações Paleobiogeográficas Dos Corais E Briozoários Dunclassified

“…Estes elementos foram registrados na Bolívia, Brasil e principalmente nos Estados Unidos, com destaque para os fenestelídeos e romboporídeos, secundarizados por Reptaria e Cyclotripa (Katzer, 1903in Katzer, 1933Blieck et al, 1996).…”

Section: Considerações Paleobiogeográficas Dos Corais E Briozoários Dunclassified

Paleobiogeographic Remarks of the Devonian Corals and Bryozoans of Brazil

2017

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“…de Santa Cruz), tentatively assigned to the Icla Formation, Pragian-Eifelian (Coll. M. Suárez-Riglos), and from a section of Cerro Alma Suchuma, SW of Copacabana de Andamarca (Western Cordillera), Huamampampa Formation, Bed 91-19-11 (Blieck et al 1996), Eifelian/Givetian boundary or more probably early Givetian. This latter is probably the latest occurrence of Parastriatopora to be dated with reasonable precision.…”

Section: A B Cmentioning

confidence: 99%

“…In another paper dealing with Devonian fossil localities in Bolivia (Blieck et al 1996), P. gigantea (det. Y. Plusquellec) is recorded from the Huamampampa Formation, in a section located to the SW of Copacabana de Andamarca.…”

Section: A C Bmentioning

confidence: 99%

New data on the Silurian–Devonian palaeontology and biostratigraphy of Bolivia

Rachebœuf¹,

Casier²,

Plusquellec³

et al. 2012

Bull. Geosci.

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In order to precisely establish the bio-and chronostratigraphic position of several levels of the Silurian-Devonian succession of Bolivia, with respect to the International Time Scale, additional Silurian and Devonian localities belonging to the Eastern Cordillera and the Interandean Zone areas have been recently revised and sampled, both for macrofossils and palynomorphs. Specifically, the localities are Ñuñumayani, and Muruhuta from the late Silurian-early Devonian time interval. Correlations with other fossiliferous localities are discussed, namely Huacallani and Rumicorral. A new outcrop yielding Middle Devonian tabulate corals at Pisacaviña is described; its faunal content is described, and compared with the historical coral collection. As a result, it appears clearly that the Silurian-Devonian Bolivian fauna needs a thorough revision, as well as the selection of stratigraphically significant macrofossils. Besides macrofossils, the analysis of palynomorph assemblages is significant in establishment of both intra-Bolivian and international correlations before any reliable biogeographic reconstruction is done. This paper records the first discovery of a plant of the genus Protolepidodendron from the Devonian of Bolivia. An ostracod assemblage from Pisacaviña is described, illustrated, and discussed for the first time; it suggests an Early Devonian or an Eifelian age. Newly described taxa include the coral Parastriatopora boliviana sp. nov., and the chonetoidean brachiopods Sanjuanetes glemareci sp. nov., and Kentronetes giae sp. nov. •

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“…En Bolivia, la parte superior de la Formación Santa Rosa, del Lochkoviano tardío-Pragiano temprano (Racheboeuf et al, 1993;Blieck et al, 1996;Melo, 2000;Grahn, 2002), se caracteriza por la aparición de Dibolisporites spp. y A. microconus (McGregor, 1984), ambas reconocidas en el retrabajo de la FM.…”

Section: Asociación Del Devónico Temprano (Emsiano)unclassified

Significado estratigráfico de palinomorfos retrabajados en la Formación Malimán (Viseano) en la Sierra del Volcán, provincia de San Juan, Argentina: resultados preliminares

Rodríguez¹

2006

RBP

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Buenos Aires, Argentina. amenabar@gl.fcen.uba.ar RESUMO -A Formação Malimán é parte de um conjunto de sedimentos de idade viseana que afloram na serra de Volcán (bacia de Río Blanco), província de San Juan, Argentina (cerca de 30°S e 69°O), os quais se depositam em discordância angular sobre o Grupo Chinguillos, de idade devoniana (Givetiano-Frasniano). Esta unidade apresenta uma associação palinológica composta por um conjunto de formas autóctones y outro de elementos retrabalhados (12,5-55%), incluindo esporos e paleomicroplâncton. O objetivo deste trabalho é discutir o significado estratigráfico dos palinomorfos compreendidos no conjunto retrabalhado. Com base nas distribuições estratigráficas, reconhecem-se dois intervalos temporais: Eodevoniano (Emsiano) e Devoniano médio-tardio (Givetiano-Fameniano precoce). As formas retrabalhadas são comparadas às microfloras siluro-devonianas da Argentina e de outras bacias da América do Sul. Baseado em reconstruções paleogeográficas do Eocarbonífero da América do Sul, considera-se a Pré-Cordilheira como a principal área fonte, a qual se encontrava próxima ao depocentro da bacia. Por fim, comprova-se a existência de um hiato erosivo e/ou não deposicional na seção estudada, que compreende o intervalo Neodevoniano (Fameniano tardío) -Eocarbonífero (Tournaisiano). Palavras-chave:Palinomorfos retrabalhados, proveniência, Eocarbonífero, Argentina. THE MALIMÁN FORMATION (VISEAN), FROM THE SIERRA DEL VOLCÁN, SAN JUAN PROVINCE, ARGENTINA: PRELIMINARY RESULTS. The Malimán Formation, Viséan in age, crops out at the Volcán range (Río Blanco Basin), northwestern Precordillera in San Juan province, Argentina, ca. 30° S and 69° W. An erosional unconformity separates the Malimán Formation from the underlying Chigua Formation of Middle Devonian (Givetian-Frasnian). This unit bears a palynological assemblage composed of two groups of palynomorphs, one with autochthonous species and other of recycled ones (12.5-55%), which includes spores and palaeomicroplankton. In the present contribution, the stratigraphic significance of the reworked palynomorphs is discussed. Based on their stratigraphic ranges, two source intervals are recognized: Early Devonian (Emsian) and Middle-Late Devonian (Givetian-Early Famennian). The recycled palynomorphs are similar to those of Siluro-Devonian Argentinian and South American assemblages. Based on Early Carboniferous palaeogeographic reconstructions of South America, the Precordillera is considered as the source area, which was placed near the depocentre. An erosional and/or a depositional hiatus, comprising the Late Devonian (Late Famennian) to the Early Carboniferous (Tournaisian), is confirmed for the studied section. ABSTRACT -STRATIGRAPHIC SIGNIFICANCE OF REWORKED PALYNOMORPHS IN

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New Devonian fossil localities in Bolivia

Cited by 20 publications

References 7 publications

Paleobiogeographic Remarks of the Devonian Corals and Bryozoans of Brazil

Paleobiogeographic Remarks of the Devonian Corals and Bryozoans of Brazil

New data on the Silurian–Devonian palaeontology and biostratigraphy of Bolivia

Significado estratigráfico de palinomorfos retrabajados en la Formación Malimán (Viseano) en la Sierra del Volcán, provincia de San Juan, Argentina: resultados preliminares

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