Nyborg, Torrey, Francisco J. Vega, and Harry F. Filkorn. “Validation of Costacopluma squiresi Nyborg, Vega & Filkorn (Crustacea: Brachyura: Retroplumidae) from the Pacific Slope, Paleocene of California, USA”. Zootaxa 5315, no. 5 (July 12, 2023): 492–494. Accessed June 7, 2025. https://www.mapress.com/zt/article/view/zootaxa.5315.5.7.