Armadillos are New World placental mammals with a leathery armor shell. The word armadillo means “little armored one” in Spanish. The Aztecs called them āyōtōchtli, Nahuatl for “turtle-rabbit”.
[F]our genetically identical offspring are born, the result of one original egg. Because they are always genetically identical, the group of four young provides a good subject for scientific, behavioral or medical tests that need consistent biological and genetic makeup in the test subjects.
Seems like they’d make a badass supervillain team for the Teenage Mutant Ninja Turtles to face. Just saying.