Results 31 to 40 of about 10,320 (217)
Estudios Geologicos, 2013 Los trilobites del Cámbrico medio encontrados en Purujosa y otras localidades de las Cadenas Ibéricas como Murero y Mesones (Zaragoza) poseen un gran número de nuevas estructuras de enrollamiento, así como tipos de enrollamiento que previamente no se ...
Jorge Esteve
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The occurrence of Phacopida trilobites from Pimenteira Formation at João Costa, Piauí, Brazil [PDF]
Geologia USP. Série Científica, 2013 The marine macroinvertebrate fossils from the Devonian of the Parnaíba Basin are among the most diverse of Paleozoic of Brazil. In recent years, most revisions on these fossils involved trilobites from the Pimenteira and Cabeças formations, in the ...
Juliana de Moraes Leme +3 more
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The fossil record of early tetrapods: worker effort and the end-Permian mass extinction [PDF]
, 2010 It is important to understand the quality of the fossil record of early tetrapods (Tetrapoda, minus Lissamphibia and Amniota) because of their key role in the transition of vertebrates from water to land, their dominance of terrestrial faunas for over ...
Bebber D.F. +18 more
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A 390 million-year-old hyper-compound eye in Devonian phacopid trilobites
Scientific Reports, 2021 Trilobites, extinct arthropods that dominated the faunas of the Palaeozoic, since their appearance c 523 million years ago, were equipped with elaborate compound eyes. While most of them possessed apposition compound eyes (in trilobites called holochroal
B. Schoenemann +5 more
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Sequence stratigraphy, chemostratigraphy and facies analysis of Cambrian Series 2 – Series 3 boundary strata in northwestern Scotland [PDF]
, 2016 Globally, the Series 2 – Series 3 boundary of the Cambrian System coincides with a major carbon isotope excursion, sea-level changes and trilobite extinctions.
Faggetter, Luke +14 more
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Estudios Geologicos, 2009 Se describe por primera vez en detalle el enrollamiento de Conocoryphe heberti y se compara con el posible enrollamiento de Occatharia sdzuyi, ambas son especies de conocorífidos abundantes en el Cámbrico medio de la subprovincia Mediterránea.
J. Esteve
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Geogaceta, 2022 Se presenta una nueva sección bioestratigrafica de la parte basal de la Formación Sueve. La nueva sección se suma a las nueve secciones descritas en estudios previos, relativos al sector septentrional del manto de Laviana.
Enrique Bernárdez +2 more
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The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia [PDF]
Estonian Journal of Earth Sciences, 2017 The earliest cornulitid Cornulites sp. appears in the Darriwilian (Lasnamägi Regional Stage) of Estonia. Internal annulation is present in all Middle Ordovician cornulitids and could be a plesiomorphic character for the group.
Olev Vinn, Ursula Toom, Mare Isakar
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Permian trilobites and the applicability of the “living fossil” concept to extinct clades
Frontiers in Ecology and Evolution, 2023 Some taxa occupy our imaginations as “living fossils” because they were known from the fossil record before being discovered alive today. Other taxa are considered “living fossils” because modern relatives bear a strong morphological resemblance to ...
Melanie J. Hopkins +3 more
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