Thomomys umbrinus (rodent)
Abundance: 0.06 to 0.72% (median 0.15%)
Latitudinal range: 30.3° to 39.5°Habitats: (4) only
Found in 4 samples
United States: Crystal Ball Cave, Schulze Cave (layer B), Schulze Cave (layer C1), Schulze Cave (layer C2)
See also Thomomys, Thomomys bottae, Thomomys orientalis, Thomomys potamacensis, Thomomys sp., Thomomys spp., Thomomys talpoides