Results 41 to 50 of about 113 (70)
Evolutionary Patterns of Trilobites Across the End Ordovician Mass Extinction [PDF]
, 2012 The end Ordovician mass extinction is the second largest extinction event in the history or life and it is classically interpreted as being caused by a sudden and unstable icehouse during otherwise greenhouse conditions.
Congreve, Curtis Raymond
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Hábitos de vida dos trilobitas das formações Maecuru e Ererê (Devoniano), Bacia do Amazonas [PDF]
, 2004 Fourteen species of trilobites were identified from the Maecuru Formation and one from Ererê Formation (Devonian, Amazon Basin), sampled at Pará State, Brazil.
Silva, Cleber Fernandes da
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Field trip: Palaeozoic echinoderms from northern Spain [PDF]
, 2019 p. 209-288Spain contains some of the most extensive and fossiliferous Palaeozoic outcrops in Europe, including echinoderm faunas that are internationally signpalaificant in terms of systematics, paleoecology and palaeobiogeography.
Arbizu, Miguel +10 more
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Faciologia, considerações bioestratigráficas e paleoambientais da Formação Ponta Grossa em afloramentos do flanco leste da Sub-bacia de Apucarana, Devoniano da Bacia do Paraná [PDF]
, 2013 Resumo: A Formação Ponta Grossa, de idade devoniana, aflora na borda leste da Bacia do Paraná ao redor do Arco de Ponta Grossa. O objetivo deste trabalho foi realizar um levantamento da faciologia, bioestratigrafia e do paleoambiente acerca da formação ...
Ng, Christiano
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Bicentenário do Museu Nacional: publicações científicas [PDF]
, 2018 This work arose from the need to compile and make our publications available quickly and easily to interested audiences, given the recurring demand from the Library and the Publications Committee for PDFs of very old and more recent volumes from the ...
Ribeiro, Lia
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DEVONIAN TRILOBITES FROM THE FALKLAND ISLANDS
, 2006 Maria da Gloria Pires de Carvalho
semanticscholar +2 more sources
Terrace ridges in trilobites [PDF]
, 2006 Many trilobites have cuesta-like structures, known as terrace ridges, on both the dorsal and ventral surfaces of the exoskeleton. Although terrace ridges all appear to have the same basic construction, they are highly variable and several types are known.
Brown, Abigail Mary
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Faunal distribution and depositional environments in the Lower Bringewoodian (Ludlovian) of Wales and the Welsh Borders [PDF]
, 1979 In this study a comprehensive quantitative analysis of the geographical and stratigraphical distribution of the faunas in the lower part of the Bringewoodian Stage (Ludlovian) in Wales and the Welsh Borderland was undertaken. Information and material was
Atkins, David Rohan
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