Genus: Nanocuris FOX, SCOTT & BRYANT, 2007
Etymology: Greek, nanos, "dwarf" and Greek, kouris, "razor" referring to teh small, blade-like lower molars of this species.

Species: improvida FOX, SCOTT, & BRYANT, 2007
Etymology: Latin, improvidus, "not anticipating"; in regards to the unexpectedly early stratigraphic occurrence of this dentally specialized plancental.

Holotype: RSM P2523.260

Locality: SMNH Locality 72F07-0022, in the Frenchman River valley, 215 miles southwest of Regina, Chambery Coulee, southeast of Eastend, near the North Dakota Border, Saskatchewan Province, Canada.

Horizon: Frenchman Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Note: 28.3 m below the K-T boundary.

Material: Incomplete right dentary containing the canine, p1, m3 and the broken roots of other teeth.

Referred material:

RIEDEL & WILSON, 2008, 2010

Locality: DMNH Loc. 982, Lance General, in the area of Lance Creek, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

DMNH 55343: Incomplete right dentary that preserves a damaged penultimate molar and distal half of the ultimate molar..

 

Locality: From the type area of the Lance Formation, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

UCMP 46359: left m1.

UCMP 82563: Mesial fragment of m2 or m3.

 

Locality: Alberta Province, Canada.

Horizon: Scollard Formation, Uppermost Edmonton Group.

Biostratigraphy:

Age: Lancian Age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material:

UA 4085b: Right M1 or M2.

AMNH 59482: Mesial fragment of left m1.