User:Abyssal/Prehistory of South America/DYK/10




 * ...that ostracoderms are the earliest known vertebrate animals?


 * ... that according to the National Geographic Society, Peruvian archaeologist Walter Alva found the richest unlooted pre-Columbian tomb in the Western Hemisphere?


 * ... that members of the extinct bivalve genus Hemiconcavodonta are unique in the subfamily Concavodontinae in that their teeth point in two directions?


 * ... that the Ordovician age bivalve Villicumia has overlapping teeth seen in few other bivalves?


 * ... that the Jurassic conifer Araucaria mirabilis (cone pictured) of Argentina may have been a primary food for sauropods?