Publication Yen (1954): summary

Full Citation

Yen, T.-C. 1954. Nonmarine Mollusks of Late Cretaceous Age From Wyoming, Utah and Colorado. Part 2: Faunas from eastern Utah and western Colorado. United States Geological Survey Professional Paper 254-B: 59-66. https://doi.org/10.3133/pp254b.

Attributed Nominal Species

Unio paraholmesianus Yen, 1954 = Nippononaia paraholmesianus

Yen, 1954. U.S. Geol. Surv. Prof. Pap. 254-B: 61, pl. 18, fig. 9, pl. 19, fig. 31.