- Melanoplus validus Scudder, 1899 in Rehn & Hebard, 1912: 90.
- Melanoplus calapooyae Hebard, 1920: 385.
Holotype; male; 6b64954c-a78c-4c3d-b50a-364d1f68717b; deposited at: Academy of Natural Sciences of Philadelphia (ANSP); United States: Oregon: Lane: Calapooia Mountains, Divide
- Melanoplus validus validus Scudder, 1899 in Fulton, 1930: 622.
- Melanoplus validus calapooyae Hebard, 1920 in Fulton, 1930: 622.
- Melanoplus ascensus calapooyae Hebard, 1920 in Hebard, 1937: 152.
- Melanoplus ascensus validus Scudder, 1899 in Hebard, 1937: 151.
- Melanoplus validus Scudder, 1899 in Strohecker, 1963: 171.
- Melanoplus calapooyae Hebard, 1920 in Strohecker, 1963: 171.
- Melanoplus validus Scudder, 1899 in Gurney & Buxton, 1968: 19.
- Melanoplus calapooyae Hebard, 1920 in Gurney & Buxton, 1968: 14.
- Melanoplus validus Scudder, 1899 in Otte, 1995: 397.
- Melanoplus calapooyae Hebard, 1920 (subjective synonym of Melanoplus validus Scudder, 1899) in Otte, 1995: 397.