Widespread azendohsaurids (Archosauromorpha, Allokotosauria) from the Late Triassic of western USA and India
نویسندگان
چکیده
Archosauromorph reptiles underwent rapid lineage diversification, increases in morphological and body size disparity, expansion into new adaptive landscapes. Several of the primary early archosauromorph clades (e.g. rhynchosaurs) are easy to differentiate from others because their characteristic types, whereas more lizard-like carnivorous forms with long necks tanystropheids) were historically all relegated groups Protorosauria or Prolacertiformes. However, it is now clear that these polyphyletic a lizard-like, form plesiomorphic for Archosauromorpha, multiple subclades started plan. Among Malerisaurus Upper Triassic India (M. robinsonae) south-western USA langstoni). In this paper, we critically re-evaluate genus. We find both species as valid, identify an diverging, but late-surviving, member Azendohsauridae within Allokotosauria. Our histological analysis assessment ontogenetic changes limb bones small large individuals demonstrate skeletons grew slowly became robust through ontogeny, larger recovered at near maximum taxon. Malerisaurus-like taxa common members Otischalkian–Adamanian (late Carnian mid-Norian) faunal assemblages strata south western USA, they absent younger Revueltian holochronozone. Specimens North America show Allokotosauria had near-Pangaean distribution much Middle Late Triassic.
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ژورنال
عنوان ژورنال: Papers in palaeontology
سال: 2021
ISSN: ['2056-2802', '2056-2799']
DOI: https://doi.org/10.1002/spp2.1413