la única especie conocida del género extinto Rapetosaurus

Sinosauropteryx prima is the only known species of the extinct genus Sinosauropteryx of feathered compsognathid theropod dinosaur

The name "Edmontosaurus" comes from the place where the first fossil was found

As a member of the hadrosaurid family

Isisaurus colberti Diplomoceras la única especie conocida delIsisaurus colberti is the only known species of the extinct Isisaurus ("Indian Statistical Institute lizard") genus of titanosaurian sauropod dinosaur, which lived in the late Cretaceous period, approximately 70 million years ago, in the Maastrichtian. This dinosaur was discovered in the Lameta Formation in India and was named after the Indian Statistical Institute (ISI), where some of the fossil material was studied. The type species is Isisaurus