Cite this article as: Kevin J. Lloyd, Carolina Sáenz-Bolaños, Victor H. Montalvo, Brayan Morera, Isabel Hagnauer & Eduardo Carrillo, et al. 2024. Altitudinal range extension of the nine-banded armadillo, Dasypus novemcinctus (Linnaeus, 1758) (Mammalia, Xenarthra), in Irazú Volcano National Park, Costa Rica. Xenarthra 25. e2501. https://doi.org/10.2305/RUMC9413