Genus: Baioconodon GAZIN, 1941
Etymology: Greek, baios, “small”, Greek, konos, “cone” and Greek, odon, “tooth”: Small cone tooth.
= Ragnark VAN VALEN, 1978
Etymology: In reference to Ragnarok, Norse Eddas, “with reference to the extinction of the Dinosaurs, which occurred while Ragnarok lived and in which it probably assisted”.

Species: nordicus (JEPSEN, 1930) GAZIN, 1941
Etymology:
= Loxolophus nordicus JEPSEN, 1930

Referred material:

LOFGREN, 1995

Locality: UCMP V87152, Lower Tedrow Channel, Tedrow Dinosaur Quarry, Bug Creek anthill, McGuire Creek, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material:

Number: Not given: 3 teeth.

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Species: harbichti (VAN VALEN, 1978)
Etymology:
= Ragnark harbichti VAN VALEN, 1978

Holotype: AMNH 35983

Locality: Harbicht Hill, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material: Right mandible with LM1-3.

Referred material:

FOX 1989

Locality: Long Fall, MNBT Quarry, Saskatchewan Province, Canada.

Horizon: Frenchman Formation.

Biostratigraphy:

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

Material:

UALVP 16052: LM3.

UALVP 22801: LM3.

UALVP 16055: UM3.