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• W1907578362 abstract "Sauropodomorph dinosaurs were an important component of Mesozoic terrestrial ecosystems.Their diversity and abundance fluctuated throughout the Mesozoic but whether this reflectsgenuine biological changes or merely variations in our sampling of the rock record is uncertain.A database of all sauropodomorph individuals (2335) has been compiled, includingenvironmental, geological, taxonomic and taphonomic data. Using a variety of sampling proxies(including a new specimen completeness metric) and a number of analytical techniques(residuals, rarefaction and phylogenetic diversity estimates), this work has demonstrated thatsauropodomorph diversity appears to be genuinely high in the Pliensbachian‐Callovian andKimmeridgian‐Tithonian, while low diversity levels are recorded for the Oxfordian andBerriasian‐Barremian, with the J/K boundary seemingly representing a real diversity crash.Diversity in the remaining Triassic‐Jurassic stages appears to be largely controlled by samplingbiases while Late Cretaceous diversity is difficult to elucidate and perhaps remains relativelyunder‐sampled. Sea level affects diversity and abundance in the Jurassic‐Early Cretaceous, butdoes not appear to be linked in the Late Cretaceous. Different clades of sauropodomorphspotentially preferred different environments and this may have had an effect on changes intheir distribution and diversity. Titanosaurs have been demonstrated to show a preference forinland environments compared to non‐titanosaurs, and it is possible that this led to theirsuccess in the Cretaceous when other sauropod clades were in decline. An assessment of thepalaeolatitudinal patterns of sauropods and ornithischians reveals a distributional skew in theLate Cretaceous, which may reflect environmental and/or dietary preferences. A study ofcompleteness through historical time contradicts the recent claim that the quality ofdinosaurian type material has improved from the 19th century to the present. These studiesillustrate that use of a number of techniques is imperative in any attempt to tease apart genuinepatterns from the biases of an uneven rock record." @default.
• W1907578362 created "2016-06-24" @default.
• W1907578362 creator A5015272217 @default.
• W1907578362 date "2010-07-28" @default.
• W1907578362 modified "2023-09-26" @default.
• W1907578362 title "Environmental and geological controls on the diversity anddistribution of the sauropodomorpha" @default.
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