Figure 3. Birgeria americana n. sp. (NMMNH P-66225, holotype) from the Smithian of the Winecup Ranch, Elko County, Nevada, USA. (1) Fossil in dorsal view (above) and in right aspect (below); (2) schematic drawing of 3.1 with interpretations of skeletal features; anterior is right. Scale bar = 50mm (total).