Bivalvia

nominal species Unio penultimus Gabb, 1864

Unio penultimus Gabb, 1864 = nomen dubium

Gabb, 1864. Geol. Surv. Calif., Paleont. 1: 182, pl. 24, fig. 164.

Taxonomic Opinions

= Unio penultimus Gabb — Henderson, 1935: 94.