Latitudinal range: 36.8° to 42.6°

Found in two samples

United States: Pratt Quarry (Middle Miocene), Whisenhunt Quarry (Late Miocene)

M1 length	3.09 mm	N = 2	Korth 1998
M1 width	3.60 mm	N = 2	Korth 1998
M2 length	2.74 mm	N = 2	Korth 1998
M2 width	2.63 mm	N = 2	Korth 1998
P4 length	3.64 mm	N = 3	Korth 1998
P4 width	4.01 mm	N = 3	Korth 1998
m1 length	3.10 mm	N = 8	Korth 1998
m1 width	3.74 mm	N = 8	Korth 1998
m2 length	2.50 mm	N = 1	Korth 1998
m2 width	2.89 mm	N = 1	Korth 1998
p4 length	4.40 mm	N = 2	Korth 1998
p4 width	3.47 mm	N = 2	Korth 1998

See also Eucastor, Eucastor phillisi, Eucastor progressus, Eucastor sp., Eucastor typicus