Morera-Brenes, Bernal, and María D. León. 1986. “Description of <i>Macroperipatus valerioi</i> N. Sp. Fron Costa Rica, and Comments on the Genus <i>Macroperipatus</i≫ (Onychophora: Peripatidae)”. Revista De Biología Tropical 34 (2):277–282. https://revistas.ucr.ac.cr/index.php/rbt/article/view/24315.