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Sistrurus tergeminus (Say, 1823) - Prairie Massasauga


Collection Summary

Sistrurus tergeminus (Prairie Massasauga) has a total of 120 valid, non-duplicated collections representing 11 counties and 37 localities. There are a total of 15 collectors and 50 collection dates for the species. This results in a total of 54 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 2017. 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 7 23 5 12 12 1938 2003
Holt 16 74 9 33 35 1939 2017
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