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#ancient reptiles #reptile evolution #longevity #living fossils #prehistoric reptiles

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#archosaur evolution #deep time #reptile evolution #crocodylian #bird ancestry #mesozoic #diapsid lineage

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#amniote phylogeny #evolutionary tree #reptile evolution #bird evolution #mammal evolution #vertebrate clade

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#silesauridae #basal dinosauriform #triassic period #reptile evolution