Troodon formosus Leidy, 1856

Remarks

• Collection:    Lee Garrison
• Formation:   Montana Group, Hell Creek Formation
• Location:      Montana
• Length:        1/8 inch

Remarks

• Collection:    Lee Garrison
• Formation:   Montana Group, Two Medicine Formation
• Location:      Montana
• Length:        3/16 inch

General Info

Synonyms (older names and misidentifications)

         Synonymy is incomplete and will be addressed later.

• 1856 Troodon formosus Leidy
• 2002 Troodon formosus Leidy; Sankey, Brinkman, Guenther & Currie

Stratigraphic Occurrence

• Montana Group, Hell Creek Formation of Montana
• Montana Group, Lance Formation of Wyoming
• Edmonton Group, Horseshoe Canyon Formation
• Judith River Group, Oldman Formation of Alberta
• Possibly the El Gallo Formation, Baja California

Age

• Troodon formosus Leidy ranges from about the middle Late Campanian Stage to Latest Maastrichtian Stage (~ 74–66 mya).

Geographic Occurrence (not an all-inclusive list)

• Alberta, Canada
• Glacier County, MT
• Natrona County, WY
• Possibly Baja California
• Powder River County, MT

Remarks

       For identification and descriptions, see:

• Sankey, J. T.; Brinkman, D. B.; Guenther, M.; Currie, P. J.  2002.  Small Theropod and Bird Teeth from the Late Cretaceous (Late Campanian) Judith River Group, Alberta.  Journal of Paleontology 76 (4), 755, fig's 4.23–4.30.