Fossils of Seymouria were first found in Seymour, Baylor County, Texas (hence the name of the type species, Seymouria baylorensis, or "Baylor County Seymour one").
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Over the years, many well preserved fossils have been found in North America and Germany, including the "Tambach Lovers", two individuals of S. sanjuanensis fossilized lying next to each other (though of course it cannot be determined whether they really were a couple killed during mating).