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Terrapene triunguis (Agassiz, 1857) - Three-toed Box Turtle

Maps

Locality Map

Locality map for Terrapene triunguis (Three-toed Box Turtle)
Locality map for Terrapene triunguis (Three-toed Box Turtle).
Map created 15 April 2026.

County Map

County map for Terrapene triunguis (Three-toed Box Turtle)
County map for Terrapene triunguis (Three-toed Box Turtle).
Map created 15 April 2026.

Historical Locality Map

Historical locality map for Terrapene triunguis (Three-toed Box Turtle)
Historical locality map for Terrapene triunguis (Three-toed Box Turtle). Black circles ( ) represent records after 1986, blue squares ( ) represent records between 1966 and 1986, orange triangles ( ) represent records prior to 1966. Note that more recent records might conceal underlying older records.
Map created 15 April 2026.

Historical County Map

Historical county map for Terrapene triunguis (Three-toed Box Turtle)
Historical county map for Terrapene triunguis (Three-toed Box Turtle). Black circles ( ) represent records after 1986, blue squares ( ) represent records between 1966 and 1986, orange triangles ( ) represent records prior to 1966. Note that only the most recent county record for each county is shown.
Map created 15 April 2026.

Ecological Drainage Locality Map

Ecological Drainage Units map for Terrapene triunguis (Three-toed Box Turtle)
Ecological Drainage Units locality map for Terrapene triunguis (Three-toed Box Turtle).
Map created 15 April 2026.

Natural Divisions Locality Map

Natural Divisions locality map for Terrapene triunguis (Three-toed Box Turtle)
Natural Divisions and Sections locality map for Terrapene triunguis (Three-toed Box Turtle).
Map created 15 April 2026.

Major Watersheds Locality Map

Major watersheds map for Terrapene triunguis (Three-toed Box Turtle)
Major Watersheds locality map for Terrapene triunguis (Three-toed Box Turtle).
Map created 15 April 2026.

Level I Ecoregion Locality Map

Level I Ecoregions map for Terrapene triunguis (Three-toed Box Turtle)
Level I Ecoregion locality map for Terrapene triunguis (Three-toed Box Turtle).
Map created 15 April 2026.

Level II Ecoregion Locality Map

Level II Ecoregions map for Terrapene triunguis (Three-toed Box Turtle)
Level II Ecoregion locality map for Terrapene triunguis (Three-toed Box Turtle).
Map created 15 April 2026.

Level III Ecoregion Locality Map

Level III Ecoregions map for Terrapene triunguis (Three-toed Box Turtle)
Level III Ecoregion locality map for Terrapene triunguis (Three-toed Box Turtle).
Map created 15 April 2026.

Level IV Ecoregion Locality Map

Level IV Ecoregions map for Terrapene triunguis (Three-toed Box Turtle)
Level IV Ecoregion locality map for Terrapene triunguis (Three-toed Box Turtle).
Map created 15 April 2026.

Native Status

Terrapene triunguis (Three-toed Box Turtle) is native to Missouri.

Collection Summary

Terrapene triunguis (Three-toed Box Turtle) has a total of 826 valid, non-duplicated collections representing 89 counties and 681 localities. There are a total of 216 collectors and 473 collection dates for the species. This results in a total of 513 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1878 and its most recent collection year is 2025. The earliest and latest collection dates (independent of earliest and most recent collection years) are March 1 and December 21, respectively. If you have a new record to report, read the New Records section of the FAQ.

Collection Summary by County

Collection summary for Terrapene triunguis (Three-toed Box Turtle) by county. Some values are unavailable since some records are represented solely by historical literature reports, which sometimes lack complete collecting data. Click on a county name to view more information about that county. Click on column headings to sort by that column.
County Localities Collections Collectors Dates Expeditions Earliest Year Latest Year
Adair 1 1 1 1 1 2006 2006
Audrain 2 2 1 1 1 2002 2002
Barry 4 20 4 4 4 1930 1955
Barton 9 9 7 9 9 1955 2022
Bates 2 2 3 2 2 1988 2020
Benton 5 5 6 5 5 1940 2017
Bollinger 5 5 5 5 5 1946 2022
Boone 19 24 7 17 19 1964 2025
Butler 7 10 7 8 9 1898 1994
Callaway 14 14 7 13 13 1938 2025
Camden 13 13 7 7 8 1933 2022
Cape Girardeau 11 12 11 12 12 1950 2007
Carter 11 11 11 9 9 1930 2022
Cass 2 2 3 2 2 1941 2014
Cedar 11 12 9 10 11 1955 2018
Chariton 1 1 1 1 1 2004 2004
Christian 9 9 10 9 9 1957 2022
Clark 1 1 1 1 1 1960 1960
Clay 1 1 1 1 1 1933 1933
Cole 12 12 10 9 9 1938 2020
Cooper 4 4 5 4 4 1965 2021
Crawford 10 15 16 10 11 1902 2024
Dade 15 15 4 9 9 1982 2022
Dallas 11 11 8 10 10 1954 2015
Dent 6 10 7 6 6 1909 2014
Douglas 5 6 4 4 5 1983 2008
Dunklin 3 4 4 3 3 1939 2021
Franklin 8 11 8 6 8 1933 2000
Gasconade 5 6 5 5 5 1933 2013
Greene 79 81 15 70 71 1965 2025
Harrison 1 1 1 1 1
Henry 2 2 2 2 2 1982 2014
Hickory 9 9 3 6 6 1992 2021
Howard 3 3 1 2 2 1999 1999
Howell 3 3 3 3 3 1932 2007
Iron 7 9 12 7 7 1940 2020
Jackson 3 4 2 4 4 1962 1983
Jasper 9 12 9 9 9 1930 2018
Jefferson 21 26 8 7 8 1893 2023
Johnson 8 12 12 10 11 1973 2014
Laclede 12 15 13 10 10 1933 2006
Lafayette 1 1 1 1 1 1994 1994
Lawrence 7 8 6 7 7 1942 2016
Lewis 2 3 2 2 2 2010 2010
Lincoln 1 2 1 2 2 1985 2013
Macon 2 2 2 2 2 2018 2021
Madison 6 6 8 6 6 1933 2020
Maries 9 9 5 8 8 1906 2024
Marion 1 2 1 1 1
McDonald 1 1 1 1 1 1976 1976
Miller 10 17 9 11 12 1934 2022
Mississippi 1 1 1 1 1 2020 2020
Moniteau 2 2 2 2 2 1982 2014
Monroe 1 1 1 1 1 2001 2001
Montgomery 5 6 6 5 6 1899 2024
Morgan 10 10 4 4 6 1967 2013
Newton 12 15 14 11 12 1924 2021
Oregon 12 12 7 8 8 2000 2020
Osage 3 3 3 3 3 1934 2015
Ozark 8 9 5 6 6 1984 2024
Perry 4 4 9 4 4 1994 2011
Pettis 8 8 5 8 8 1946 2024
Phelps 15 21 16 14 15 1930 2025
Pike 8 8 5 7 7 1934 2023
Platte 1 1 1 1 1 2011 2011
Polk 25 26 6 19 19 1975 2023
Pulaski 5 5 7 5 5 1949 2022
Ralls 1 1 1 1 1 2018 2018
Randolph 3 3 1 3 3 2000 2024
Reynolds 3 3 5 3 3 1941 2022
Ripley 3 3 4 3 3 1996 2008
Saint Charles 4 5 5 3 5 1973 1989
Saint Clair 9 13 17 9 11 1945 2017
Sainte Genevieve 1 1 1 1 1 2004 2004
Saint Francois 8 9 9 7 8 1894 2008
Saint Louis 5 11 3 8 8 1878 1968
Saline 3 3 2 3 3 1991 2018
Scott 5 5 5 4 5 1996 2011
Shannon 8 9 11 7 7 1932 2020
Stoddard 8 9 8 7 7 1962 2019
Stone 7 8 11 8 8 1927 2012
Taney 15 15 9 13 14 1982 2025
Texas 9 13 6 7 7 1930 2024
Vernon 7 9 7 7 7 1934 2018
Warren 6 23 3 5 5 1972 2005
Washington 5 6 3 5 5 1909 2005
Wayne 18 23 25 19 20 1934 2022
Webster 13 21 5 8 9 1932 2016
Wright 11 17 5 8 8 1932 2019

Potential County Records

Potential counties for Terrapene triunguis (Three-toed Box Turtle). Counties are listed in descending order of their likelihood of having this species. Click on a county to view more information about that county. Click on column headings to sort by that column.
Likelihood County Rationale Ecoregion / Watershed
2 Gentry Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
2 New Madrid Same Level IV ecoregion, within 5 miles St. Francis Lowlands
2 Pemiscot Same Level IV ecoregion, within 5 miles St. Francis Lowlands
4 Daviess Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
4 Ray Same Level IV ecoregion, within 10 miles Rolling Loess Prairies
4 Worth Same Level IV ecoregion, within 10 miles Loess Flats and Till Plains
6 Buchanan Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
6 Carroll Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
6 Carroll Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Clinton Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
6 De Kalb Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Knox Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Linn Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Putnam Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Schuyler Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Scotland Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Shelby Same Level IV ecoregion, within 20 miles Claypan Prairie
6 Shelby Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Sullivan Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
8 Andrew Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Grundy Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Livingston Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Mercer Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Nodaway Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains

Linnaean Classification

Kingdom:
Animalia - Animals
Phylum:
Chordata - Chordates
Subphylum:
Vertebrata - Vertebrates
Class:
Reptilia Laurenti, 1768 - Reptiles
Order:
Testudines Batsch, 1788 - Turtles
Family:
Emydidae Gray, 1825 - Box and Basking Turtles
Genus:
Terrapene Merrem, 1820 - American Box Turtles
Species:
Terrapene triunguis (Agassiz, 1857) - Three-toed Box Turtle

Recent Taxonomic Synonyms