Though hadrosaurid specimens from South America had been described before, Secernosaurus koeneri was the first species of South American hadrosaurid to be formally named. The genus name Secernosaurus means "separated reptile" and comes from the Latin verb sēcernō, meaning to sever or divide, in reference to its geographic location separated from Laurasian hadrosaurs.
Though hadrosaurid specimens from South America had been described before, Secernosaurus koeneri was the first species of South American hadrosaurid to be formally named. The genus name Secernosaurus means "separated reptile" and comes from the Latin verb sēcernō, meaning to sever or divide, in reference to its geographic location separated from Laurasian hadrosaurs.