Early Ordovician (Tremadocian) brachiopods from the Eastern Alborz Mountains, Iran [PDF]
Estonian Journal of Earth Sciences, 2011 Six linguliform and two rhynchonelliform brachiopods, including three new species Eurytreta ahmadii, Wahwahlingula kharbashi and Nanorthis bastamensis are described from Tremadocian strata (Paltodus deltifer deltifer conodont Biozone) in the Deh-Molla ...
Leonid E. Popov +2 more
doaj +4 more sources
Tremadocian (Ordovician) reclined graptolites from Baishan, North China [PDF]
Estonian Journal of Earth Sciences, 2023 The Erdaopuzi section in the Baishan area of Jilin Province, northeast China, contains abundant late Tremadoc graptolites. However, there are some taxonomic controversies regarding the characters of the hand specimens that are difficult to identify.
Ming Li +3 more
doaj +2 more sources
Early Tremadocian graptolites from the Arivechi area, Sonora, northern Mexico [PDF]
Estonian Journal of Earth Sciences, 2023 Graptolites from the early Tremadocian Anisograptus matanensis Biozone are identified from east-central Sonora, northwestern Mexico, within a carbonate-shelf succession deposited on the southwestern continental shelf margin of Laurentia.
Dulce Raquel Reyes-Montoya +5 more
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Rhabdopleurid epibionts from the Ordovician Fezouata Shale biota and the longevity of cross-phylum interactions [PDF]
Communications Biology, 2023 Evidence of interspecific interactions in the fossil record is rare but offers valuable insights into ancient ecologies. Exceptional fossiliferous sites can preserve complex ecological interactions involving non-biomineralized organisms, but most of ...
Karma Nanglu +3 more
doaj +2 more sources
Highly resolved taphonomic variations within the Early Ordovician Fezouata Biota [PDF]
Scientific ReportsThe Fezouata Biota (Morocco) is a Burgess Shale-type (BST) assemblage that provides a wealth of information on Early Ordovician ecosystems. Much work has been done to compare the preservation of the Fezouata Biota to other BSTs.
Farid Saleh +12 more
doaj +2 more sources
A miniature Ordovician hurdiid from Wales demonstrates the adaptability of Radiodonta [PDF]
Royal Society Open Science, 2020 Originally considered as large, solely Cambrian apex predators, Radiodonta—a clade of stem-group euarthropods including Anomalocaris—now comprises a diverse group of predators, sediment sifters and filter feeders.
Stephen Pates +3 more
doaj +2 more sources
Nitrogen and organic carbon isotope record in Tremadocian highly metalliferous black shales from Baltica [PDF]
Estonian Journal of Earth Sciences, 2023 Tremadocian highly metalliferous black shales and associated grey shales from the Aseri PH012B drill core (NE Estonia) in the innermost part of the Baltic Palaeobasin were targeted to record their nitrogen and organic carbon isotope variance combined ...
Mawo Ndiaye +4 more
doaj +1 more source
Early Tremadocian cephalopods from Santa Rosita Formation in NW Argentina: the oldest record for South America [PDF]
Acta Palaeontologica Polonica, 2023 We describe early Tremadocian (Kainella meridionalis Biozone) cephalopods from the Cordillera Oriental, Jujuy, NW Argentina. They consist of numerous small specimens collected at the Quebrada de Arenal, Trancas section, near the town of Tilcara, in the
MARCELA CICHOWOLSKI +5 more
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Solutan echinoderms from the Lower Ordovician of the Montagne Noire (France): new data and palaeobiogeographic implications [PDF]
Estonian Journal of Earth Sciences, 2023 Solutans are relatively common members of echinoderm assemblages in the Saint-Chinian Formation (upper Tremadocian) of the Montagne Noire (France). The revision of all available material confirms that most specimens can be assigned to Minervaecystis ...
Christophe Dupichaud +2 more
doaj +1 more source
Frontiers in Ecology and Evolution, 2023 In the Lower Ordovician of Morocco, solutan echinoderms are relatively common, locally abundant, geographically widespread (Central and Eastern Anti-Atlas), and biostratigraphically long-ranging (late Tremadocian–mid Floian) components of the Fezouata ...
Christophe Dupichaud +8 more
doaj +1 more source