Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: > 300
Comments: It is rare in North Carolina (few in N border NW, E and NE coast) (Dillon et al., 2006). In Georgia, it is in a spring in DeKalb Co. (Dillon et al., 2006). In Alabama, it is common throughout (Mirarchi, 2004). In Florida, it is in the panhandle in systems that drain S from Georgia and Alabama (Thompson, 1999). In Kentucky: Cumberland (Branson and Batch, 1987), Kentucky (Branson and Batch, 1981), Tennessee (Branson and Batch, 1987) and Ohio drainage (Branson and Batch, 1983; 1987). Blair and Sickel (1986) list 8 of 44 sites in Land Between the Lakes in Kentucky and Tennessee. It was in Frog Bayou (Lower Arkansas) (Gordon, 1985), White (Gordon, 1982) and Bayou Bartholomew drainages (Minton et al., 2008), Arkansas. It is in several areas in Alaska (Baxter, 1987). Pyron et al. (2008) listed 8 of 123 current and 22 historical in Indiana with most historic in the north. Branson (1966) cites it from the Spring River drainage in Kansas and Missouri. In Missouri , Wu et al. (1997) (P. elliptica) list 1 from Schuyler Co. and N of the Missouri River, 1 from Stoddard Co.; and the Ozarks (as P. goodrichi) (Camden, Crawford, Dallas, Dent, Iron, Jefferson, Lincoln, Oregon, Ozark, Pulaski, Reynolds, St. Charles, Shannon, Stoddard, Warren, Wayne Cos.); Prairie regions N of the Mississippi River (as P. saffordii) (Audrain, Grundy, Linn, Macon, Mercer Cos.); Missouri Prairie Region (as P. salina) (Clay Co.); nominal gyrina widely distributed (Andrew, Barry, Bates, Carroll, Carter, Chariton, Christian, Clay, Dent, Gasconade, Grundy, Harrison, Hickory, Holt, Iron, Jefferson, Johnson, Lincoln, Livingston, McDonald, Marion, Moniteau, Nodaway, Oregon, Ozark, Perry, Pike, Polk, Pulaski, Putnam, Ray, Raynolds, Ripley, St. Clair, St. Louis, Saline, Schuyler, Stoddard, Taney, Warren, Washington, Wayne, Webster, Wright Cos.). In Pennsylvania, it is in the Delaware, Ohio, Potomac, and Susquehanna bains (Evans and Ray, 2010). The first Ohio record is Sterki (1902). Wu and Beetle (1995) list in Wyoming (as P. elliptica) in Yellowstone National Park and Washakie Co.; and (P. gouldi) in the west in Albany, Fremont, Sheridan, Sublette, Teton, and Uinta Cos.; as P. whitei across the plains in Carbon, Crook, Fremont, Hot Springs, Johnson, Laramie, Platte, Sheridan, Sublette, Weston, Yellowstone National Park; and nominally in Sheridan Co. Wu and Liu (2001) list it (P. elliptica) in Anderson Co. and considered Leonard's (1959) P. hawnii from Verdegris River a synonym. Wu and Liu (2001) list it (P. gouldi) from Anderson, Chautauqua, McPherson, Phillip, and Wabaunsee Cos.; P. whitei from Brown, Cheyenne, Clark, Linn, Nemaha, Pottawatomie, Riley, and Wabaunsee Cos.; (as P. saffordi) from Barton, Chase, and Marshall Cos., Kansas. Wu and Liu (2001) list nominal gyrina from Butler, Geary, and Morris Cos, S of the Kansas River. Freeman and Perkins (1992; 1997) list it in Nebraska on the Platte and Niobrara Rivers. Wu (2005) lists it in Nebraska (P. gouldi) mostly N of the Platte River in Brown, Burt, Cherry, Dodge, Lincoln, and Sheridan Cos.; and (P. saffordi) in N Blain, central Keya Paha, N Rock and E Richardson Cos.; (P. warreniana) in NW Arthur, Sheridan, and Sioux Cos.; (P. whitei) only in Cherry Co. Lysne and Pierce (2009) found it abundant in Crystal Creek-Spring Creek, Blaine Co., Idaho and Lysne and Clark (2009) found it in the Bruneau River (Snake River confluence upstream to Hot Creek). In Alberta, sources noted: East of Red Deer, Macleod and the Little Bow River; 9 lakes in Jasper National Park; approximately 8 lakes and creeks; sloughs near Wainwright; approximately 35 locations along the Saskatchewan and Mackenzie River systems; Wabamun Lake; beaver ponds near Sheep River; Hawrelak Park, Edmonton; Vermilion Lakes; 10 sites in Banff National Park; 2 at Lethbridge; 3 Vermilion Lakes and 2 other lakes (Lepitzki, 2001).
