نتایج جستجو برای: late devonian
تعداد نتایج: 197086 فیلتر نتایج به سال:
This contribution contains the 3D models of set Famennian conodont elements belonging to species Polygnathus glaber and communis analyzed in following publication: Renaud et al. 2021: Patterns bilateral asymmetry allometry Late Devonian Polygnathus. Palaeontology,
Lungfish, or dipnoans, have a history spanning over 400 million years and are the closest living sister taxon to the tetrapods. Most Devonian lungfish had heavily ossified endoskeletons, whereas most Mesozoic and Cenozoic lungfish had largely cartilaginous endoskeletons and are usually known only from isolated tooth plates or disarticulated bone fragments. There is thus a substantial temporal a...
The Silurian–Devonian plant radiation was an event triggered by the progressive colonization of subaerial habitats. Nevertheless, it is still unclear whether this globally uniform or alternative diversification scenarios emerged depending on geographical context. Here, we report early land diversity patterns across different previously defined palaeogeographical units (i.e., Laurussia, Siberia,...
-Isotopic measurements (Sr, O, D) on formation waters from the Alberta Basin have been made, covering a stratigraphic range from Devonian to Upper Cretaceous. These measurements, combined with chemical compositional trends, give evidence for two distinct water regimes. One hydrological regime is composed of waters hosted in Devonian-Lower Cretaceous reservoirs, the other waters from Upper Creta...
Fossil record of stem groups employed in evaluating the chronogram of insects (Arthropoda: Hexapoda)
Insecta s. str. (=Ectognatha), comprise the largest and most diversified group of living organisms, accounting for roughly half of the biodiversity on Earth. Understanding insect relationships and the specific time intervals for their episodes of radiation and extinction are critical to any comprehensive perspective on evolutionary events. Although some deeper nodes have been resolved congruent...
Recent discoveries of previously unknown fossil forms have dramatically transformed understanding of many aspects of the fish-tetrapod transition. Newer paleobiological approaches have also contributed to changed views of which animals were involved and when, where, and how the transition occurred. This review summarizes major advances made and reevaluates alternative interpretations of importa...
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