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Their results are displayed in the cladogram below. Specimen MACN-Pv-N 35, an unnamed rebbachisaurid from the La Amarga Formation represented by a single partial vertebra, may also be closely related to these taxa, but it was removed from most analyses to obtain more resolved results.
The geologic time scale, proportionally represented as a log-spiral with some major events in Earth's history. A megaannus (Ma) represents one million (10 6) years.. The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth.
Fossil material of a giant titanosaur sauropod, distinct from Andesaurus and probably exceeding Patagotitan in size, is described from the Cenomanian Candeleros Formation by Otero et al. (2021). [240] Revision of known fossil material of Pellegrinisaurus powelli and a study on the skeletal anatomy, bone histology and phylogenetic relationships ...
An early Campanian assemblage of anuran bones, suggestive of high local species richness of frogs, is described from the Aguja Formation (Texas, United States) by Wick (2021). [174] Fossil material of Late Cretaceous frogs, including fossils of calyptocephalellid frogs and the southernmost record of pipids (Kuruleufenia) worldwide reported to ...
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The term chronograph comes from the Greek χρονογράφος (khronográphos 'time recording'), from χρόνος (khrónos 'time') and γράφω (gráphō 'to write'). '). Early versions of the chronograph are the only ones that actually used any "writing": marking the dial with a small pen attached to the index so that the length of the pen mark would indicate how much time had
A study on the evolution of tooth complexity in squamates, based on data from extant and fossil taxa, is published by Lafuma et al. (2021). [21]A study on the diversity of jaw sizes, lower jaw shape and morphology of teeth in Cretaceous squamates is published by Herrera-Flores, Stubbs & Benton (2021), who interpret their findings as indicating that a substantial expansion of ecomorphological ...
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