User:Abyssal/Prehistory of South America/DYK/2

• ... that modern humans have been found to inhabit various countries for periods ranging from almost 200,000 years to less than 800 years?

• ... that a fossil of Concavodonta described in 1843 has been lost?

• ...that Santanachelys gaffneyi is the earliest known sea turtle?

• ... that fossils of the extinct bivalve family Praenuculidae have been found on every continent except Antarctica?

• ... that Decuriasuchus may be the first known archosaur to exhibit group behavior?