| Species: | Distribution of the species and type locality: | Age: |
| †V. acutus (Matthew & Granger, 1915)[9] |
 USA (Colorado and Wyoming) |
56.2–50.5 Ma |
| †V. gracilis (Marsh, 1872)[2] |
USA
|
54.9–46.2 Ma |
| †V. lawsoni (Hooker, 2010)[10] |
 UK (Abbey Wood, Blackheath Beds Formation in Greater London) |
56.0–55.2 Ma |
| †V. laytoni (Gingerich & Winkler, 1985)[11] |
 Canada (Alberta)
USA (Princeton Quarry, Fort Union Formation, Clark's Fork Basin in Wyoming) |
60.9–54.9 Ma |
| †V. lutosus (Gazin, 1952)[12] |
USA
- Colorado
- Knight Formation in Wyoming
|
54.9–46.2 Ma |
| †V. minutus (Wortman, 1901)[13] |
USA (Colorado, Nevada, Utah and Wyoming) |
54.9–39.7 Ma |
| †V. politus (Matthew & Granger, 1915) |
USA (Colorado and Wyoming) |
60.9–50.5 Ma |
| †V. rosei (Polly, 1997)[14] |
USA (Wyoming) |
56.2–50.5 Ma |
| †V. sicarius (Matthew, 1909)[15] |
USA:
- Colorado
- Utah
- Bridger Formation in Wyoming
|
50.5–39.7 Ma |
| †V. sp. [V11141] (Meng, 1998)[16] |
 China (Inner Mongolia) |
42.0–39.9 Ma |
| †V. sp. [Locality Group 2, Washakie Basin, Wyoming] (Tomiya, 2021)[17] |
USA (Wyoming) |
47.0–46.2 Ma |
