This site will look much better in a browser that supports web standards, but it is accessible to any browser or Internet device.

Sistrurus tergeminus (Say, 1823) - Prairie Massasauga

Maps

Locality Map

Locality map for Sistrurus tergeminus (Prairie Massasauga)
Locality map for Sistrurus tergeminus (Prairie Massasauga).
Map created 6 March 2024.

County Map

County map for Sistrurus tergeminus (Prairie Massasauga)
County map for Sistrurus tergeminus (Prairie Massasauga).
Map created 6 March 2024.

Historical Locality Map

Historical locality map for Sistrurus tergeminus (Prairie Massasauga)
Historical locality map for Sistrurus tergeminus (Prairie Massasauga). 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 6 March 2024.

Historical County Map

Historical county map for Sistrurus tergeminus (Prairie Massasauga)
Historical county map for Sistrurus tergeminus (Prairie Massasauga). 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 6 March 2024.

Ecological Drainage Locality Map

Ecological Drainage Units map for Sistrurus tergeminus (Prairie Massasauga)
Ecological Drainage Units locality map for Sistrurus tergeminus (Prairie Massasauga).
Map created 6 March 2024.

Natural Divisions Locality Map

Natural Divisions locality map for Sistrurus tergeminus (Prairie Massasauga)
Natural Divisions and Sections locality map for Sistrurus tergeminus (Prairie Massasauga).
Map created 6 March 2024.

Major Watersheds Locality Map

Major watersheds map for Sistrurus tergeminus (Prairie Massasauga)
Major Watersheds locality map for Sistrurus tergeminus (Prairie Massasauga).
Map created 6 March 2024.

Level I Ecoregion Locality Map

Level I Ecoregions map for Sistrurus tergeminus (Prairie Massasauga)
Level I Ecoregion locality map for Sistrurus tergeminus (Prairie Massasauga).
Map created 6 March 2024.

Level II Ecoregion Locality Map

Level II Ecoregions map for Sistrurus tergeminus (Prairie Massasauga)
Level II Ecoregion locality map for Sistrurus tergeminus (Prairie Massasauga).
Map created 6 March 2024.

Level III Ecoregion Locality Map

Level III Ecoregions map for Sistrurus tergeminus (Prairie Massasauga)
Level III Ecoregion locality map for Sistrurus tergeminus (Prairie Massasauga).
Map created 6 March 2024.

Level IV Ecoregion Locality Map

Level IV Ecoregions map for Sistrurus tergeminus (Prairie Massasauga)
Level IV Ecoregion locality map for Sistrurus tergeminus (Prairie Massasauga).
Map created 6 March 2024.

Native Status

Sistrurus tergeminus (Prairie Massasauga) is native to Missouri.

Collection Summary

Sistrurus tergeminus (Prairie Massasauga) has a total of 140 valid, non-duplicated collections representing 11 counties and 41 localities. There are a total of 22 collectors and 59 collection dates for the species. This results in a total of 65 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1915 and its most recent collection year is 2023. The earliest and latest collection dates (independent of earliest and most recent collection years) are March 27 and October 31, respectively. If you have a new record to report, read the New Records section of the FAQ.

Collection Summary by County

Collection summary for Sistrurus tergeminus (Prairie Massasauga) 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
Andrew 1 2 1 1 1
Atchison 1 1 1 1 1
Audrain 1 1 1 1 1 2009 2009
Chariton 8 25 5 13 13 1938 2021
Holt 19 92 16 41 45 1939 2023
Jackson 2 2 1 2 2 1915 1915
Linn 1 4 2 1 2
Nodaway 2 2 2 2 2 1965 2013
Platte 3 7 2 4 4 1940 1941
Randolph 1 2 1 1 1
Saline 2 2 2 2 2 1942 1942

Potential County Records

Potential counties for Sistrurus tergeminus (Prairie Massasauga). 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 Boone Same Level IV ecoregion, within 5 miles Claypan Prairie
2 Buchanan Same Level IV ecoregion, within 5 miles Missouri Alluvial Plain
2 Callaway Same Level IV ecoregion, within 5 miles Claypan Prairie
2 Carroll Same Level IV ecoregion, within 5 miles Missouri Alluvial Plain
2 Carroll Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
2 Carroll Same Level IV ecoregion, within 5 miles Rolling Loess Prairies
2 Livingston Same Level IV ecoregion, within 5 miles Loess Flats and Till Plains
3 Clay Same Level III ecoregion, within 5 miles Western Corn Belt Plains
4 Cass Same Level IV ecoregion, within 10 miles Wooded Osage Plains
4 Johnson Same Level IV ecoregion, within 10 miles Wooded Osage Plains
4 Lafayette Same Level IV ecoregion, within 10 miles Wooded Osage Plains
6 Clinton Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
6 Grundy Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Macon Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Monroe Same Level IV ecoregion, within 20 miles Claypan Prairie
6 Sullivan Same Level IV ecoregion, within 20 miles Loess Flats and Till Plains
6 Worth Same Level IV ecoregion, within 20 miles Rolling Loess Prairies
8 Adair Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Caldwell Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Cooper Same Level IV ecoregion, within 30 miles Rolling Loess Prairies
8 Daviess Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 De Kalb Same Level IV ecoregion, within 30 miles Rolling Loess Prairies
8 Henry Same Level IV ecoregion, within 30 miles Wooded Osage Plains
8 Howard Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Howard Same Level IV ecoregion, within 30 miles Claypan Prairie
8 Howard Same Level IV ecoregion, within 30 miles Missouri Alluvial Plain
8 Montgomery Same Level IV ecoregion, within 30 miles Claypan Prairie
8 Pettis Same Level IV ecoregion, within 30 miles Rolling Loess Prairies
8 Ralls Same Level IV ecoregion, within 30 miles Claypan Prairie
8 Ray Same Level IV ecoregion, within 30 miles Loess Flats and Till Plains
8 Ray Same Level IV ecoregion, within 30 miles Rolling Loess Prairies
8 Ray Same Level IV ecoregion, within 30 miles Missouri Alluvial Plain
10 Gentry Same Level IV ecoregion, adjacent county Loess Flats and Till Plains
10 Pike Same Level IV ecoregion, adjacent county Claypan Prairie

Linnaean Classification

Kingdom:
Animalia - Animals
Phylum:
Chordata - Chordates
Subphylum:
Vertebrata - Vertebrates
Class:
Reptilia Laurenti, 1768 - Reptiles
Order:
Squamata Oppel, 1811 - Lizards and Snakes
Suborder:
Serpentes Linnaeus, 1758 - Snakes
Family:
Viperidae Bonaparte, 1840 - Asps and Vipers
Genus:
Sistrurus Garman, 1883 - Massasaugas and Pygmy Rattlesnakes
Species:
Sistrurus tergeminus (Say, 1823) - Prairie Massasauga

Recent Taxonomic Synonyms

(none)