Search results for "Archosauria"

showing 4 items of 4 documents

A new styracosternan hadrosauroid (Dinosauria: Ornithischia) from the Early Cretaceous of Portell, Spain

2021

A new styracosternan ornithopod genus and species is described based on the right dentary of a single specimen from the Mirambell Formation (Early Cretaceous, early Barremian) at the locality of Portell, (Castellón, Spain).Portellsaurus sosbaynatigen. et sp. nov. is diagnosed by two autapomorphic features as well as a unique combination of characters. The autapomorphies include: the absence of a bulge along the ventral margin directly ventral to the base of the coronoid process and the presence of a deep oval cavity on the medial surface of the mandibular adductor fossa below the eleventh-twelfth tooth position. Phylogenetic analyses reveal that the new Iberian form is more closely related …

Bacterial DiseasesAutapomorphyTeethPhysiologyDigestive PhysiologyMandible010502 geochemistry & geophysics01 natural sciencesDinosaursMedical ConditionsornithischiaCariesMedicine and Health SciencesMusculoskeletal SystemdinosaursPhylogenyData ManagementArchosauriaCretaceous PeriodMultidisciplinarybiologyFossilsQREukaryotaPhylogenetic AnalysisGeologyPrehistoric AnimalsBiodiversityBiological EvolutionCretaceousPhylogeneticsInfectious DiseasesOuranosaurusMesozoic EraMedicineAnatomyOrnithischiaCretaceous periodOrnithischiaResearch ArticleComputer and Information Sciences010506 paleontologyScienceVertebrate PaleontologyMantellisaurusdentitionPaleontologySymphysesAnimalsDentitionEvolutionary SystematicsPaleozoologyTaxonomy0105 earth and related environmental sciencesteethEvolutionary Biologyphylogenetic analysisOrganismsBiology and Life SciencesPaleontologyGeologic TimeBariliumsymphysesbiology.organism_classificationJawSpainEarth SciencesIguanodonPaleobiologyDigestive SystemHeadZoologyOrnithopod
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Dinosaur Metabolism and the Allometry of Maximum Growth Rate

2016

In his 2016 paper, Myhrvold criticized ours from 2014 on maximum growth rates (Gmax, maximum gain in body mass observed within a time unit throughout an individual’s ontogeny) and thermoregulation strategies (ectothermy, endothermy) of 17 dinosaurs. In our paper, we showed that Gmax values of similar-sized extant ectothermic and endothermic vertebrates overlap. This strongly questions a correct assignment of a thermoregulation strategy to a dinosaur only based on its Gmax and (adult) body mass (M). Contrary, Gmax separated similar-sized extant reptiles and birds (Sauropsida) and Gmax values of our studied dinosaurs were similar to those seen in extant similar-sized (if necessary scaled-up) …

0106 biological sciences0301 basic medicineMetabolic stateMetabolic AnalysisPhysiologylcsh:MedicineAnimal Phylogenetics01 natural sciencesBody TemperatureDinosaursMathematical and Statistical TechniquesExtant taxonMedicine and Health SciencesBody SizeGrowth ratelcsh:Sciencemedia_commonArchosauriaData ManagementMammalsMultidisciplinaryEcologyFossilsEukaryotaRegression analysisPrehistoric AnimalshumanitiesCurve FittingPhylogeneticsBioassays and Physiological AnalysisPhysiological ParametersEctothermPhysical SciencesVertebratesRegression AnalysisStatistics (Mathematics)Research ArticleComputer and Information Sciencesmedia_common.quotation_subjectVertebrate PaleontologyBiologyResearch and Analysis Methods010603 evolutionary biologyMarsupialsFormal CommentBirds03 medical and health sciencesBasal Metabolic Rate MeasurementAnimalsEvolutionary SystematicsStatistical MethodsPaleozoologyTaxonomyEvolutionary BiologyVariableslcsh:ROrganismsReptilesBiology and Life SciencesPaleontology030104 developmental biologyEvolutionary biologyBasal metabolic rateAmniotesEarth Scienceslcsh:QAllometryPaleobiologyEnergy MetabolismZoologyMathematical FunctionsMathematicsPLoS ONE
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Response to formal comment on Myhrvold (2016) submitted by Griebeler and Werner (2017)

2018

In his 2016 paper, Myhrvold criticized ours from 2014 on maximum growth rates (Gmax, maximum gain in body mass observed within a time unit throughout an individual’s ontogeny) and thermoregulation strategies (ectothermy, endothermy) of 17 dinosaurs. In our paper, we showed that Gmax values of similar-sized extant ectothermic and endothermic vertebrates overlap. This strongly questions a correct assignment of a thermoregulation strategy to a dinosaur only based on its Gmax and (adult) body mass (M). Contrary, Gmax separated similar-sized extant reptiles and birds (Sauropsida) and Gmax values of our studied dinosaurs were similar to those seen in extant similar-sized (if necessary scaled-up) …

0106 biological sciences0301 basic medicineMetabolic AnalysisPhysiologylcsh:MedicineAnimal Phylogenetics01 natural sciencesDinosaursBody TemperatureExtant taxonOrnithologyMaximum gainMedicine and Health SciencesGrowth rateSauropsidalcsh:ScienceArchosauriaData ManagementMammalsMultidisciplinarybiologyVertebrateEukaryotaPrehistoric AnimalsThermoregulationPhylogeneticsBioassays and Physiological AnalysisPhysiological ParametersEctothermVertebratesRegression AnalysisComputer and Information SciencesVertebrate PaleontologyZoologyResearch and Analysis Methods010603 evolutionary biologyFormal CommentBirds03 medical and health sciencesbiology.animalBasal Metabolic Rate MeasurementAnimalsAnimal PhysiologyEvolutionary SystematicsPaleozoologyTaxonomyEvolutionary Biologylcsh:ROrganismsBiology and Life SciencesPaleontologyReptilesbiology.organism_classificationBird Physiology030104 developmental biologyAmniotesEarth Scienceslcsh:QAllometryPaleobiologyZoologyPLoS ONE
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Data from: Paleohistological estimation of bone growth rate in extinct archosaurs

2011

The clade Archosauria contains two very different sister groups in terms of diversity (number of species) and disparity (phenotypic variation): Crurotarsi (taxa more closely related to crocodiles than to birds) and Ornithodira (pterosaurs and dinosaurs including birds). The extant species of Crurotarsi may constitute a biased sample of past biodiversity regarding growth patterns and metabolic rates. Bone histological characters can be conserved over hundreds of millions of years in the fossil record and potentially contain information about individual age at death, age at sexual maturity, bone growth rates, and basal metabolic rates of extinct vertebrates. Using a sample of extant amniotes,…

medicine and health careCrurotarsiPaleohistologyMedicinearchosaursLife sciencesOrnithodiraArchosauria
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