Mammalia - Rodentia - Cricetidae

Alternative combination: Pliopotamys idahoensis

Synonyms: Anaptogonia cloacina Cope 1899, Anaptogonia hiatidens Cope 1871, Arvicola hiatidens Cope 1871, Microtus hiatidens Cope 1871, Ondatra hiatidens Cope 1871, Sycium cloacinum Cope 1899

Full reference: R. W. Wilson. 1933. A rodent fauna from later Cenozoic beds of southwestern Idaho. Carnegie Institution of Washington Publication 440(8):117-135

Belongs to Ondatra according to R. A. Martin 1996

Sister taxa: Ondatra annectens, Ondatra meadensis, Ondatra minor, Ondatra zibethicus

Type specimens:

• Ondatra idahoensis: Its type locality is Jackass Butte (USGS 20764), which is in a Blancan terrestrial horizon in Idaho
• Anaptogonia cloacina:
• Arvicola hiatidens: Its type locality is Port Kennedy Cave, which is in an Irvingtonian cave horizon in Pennsylvania.

Average measurements (in mm): M1 3.60 x 2.10, M2 2.70 x 1.90, M3 2.40 x 1.50, m1 4.69 x 2.06, m2 2.60 x 1.85, m3 2.50 x 1.70

Estimated body mass: 697.6 g based on m1 length