Walckenaeria directa (=Cornicularia directa).—374, male enlarged sixteen times. 375, head of male showing the double horn. 376, head of male from above
Adams, Richard J.; Manolis, Timothy D. (2014). Field Guide to the Spiders of California and the Pacific Coast States (California Natural History Guides). University of California Press.
Bradley, Richard A. (2012). Common Spiders of North America. University of California Press.
Capinera, John L., ed. (2008). Encyclopedia of Entomology. Springer.
ISBN978-1402062421.