Thompson, Fred, and Greg Brewer. “Landsnails of the Genus Humboldtiana from Northern Mexico (Gastropoda, Pulmonata, Helicoidea, Humboldtianidae)”. Bulletin of the Florida Museum of Natural History 43, no. 2 (November 15, 2000): 49–77. Accessed September 28, 2025. https://flmnhbulletin.com/index.php/flmnh/article/view/flmnh-vol43-no2.