Oogenus: Montanoolithus ZELENITSKY & THERRIEN, 2008
Etymology: After Montana, the state for which the clutch was collected, and from Greek, oon, 'egg', and Greek, lithos, 'stone'.
Oospecies: strongorum ZELENITSKY & THERRIEN, 2008
Etymology: In honor of Richard and Donna Strong, who kindly supported this project.
Holotype: RTMP 2007.A.1
Locality: C. 22 km SSW of Cut Bank, Blackfeet Reservtion, Glacier County, Montana.
Horizon: Two Medicine Formation.
Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.
Material: A nesting trace and 5 partial eggs of an in situ clutch.
RTMP 94.157.30-37, 85.17.1, 2004.31.6: Small eggshell fragments.