The species
Anconodon cochranensis was named by Russell in 1929 and Van Valen and Sloan in 1966. It has also been known as
A. russelli (Simpson 1935; Jepsen 1940);
Ectopodon cochranensis (Russel 1967);
Ectypodus cochranensis (Simpson 1937a);
Ectypodus russelli (Simpson 1935d);
Liotomus russelli; and
Ptilodus cochranensis (Russell 1929).
Fossil remains have been found in the Tiffanian (Middle-Upper Paleocene)-age
strata of
Alberta (Canada) and
Montana and
Wyoming (United States). It has been cited as a descendant of
A. gidleyi. The
holotype is in the
University of Alberta collection. The body mass has been estimated to be about 55 g, the weight of two standard mice. The species
Anconodon gidleyi was named by Simpson G.G. in 1935 and Jepsen G.L. in 1940. It has also been known as
A. gibleyi and
Ptilodus ?gidleyi (Simpson 1935d). Fossil remains have been found in the Torrejonian (Middle-Upper Paleocene)-age strata of the Gidley Quarry in Montana and in Wyoming, New Mexico and Alberta. This species is cited as a possible descendant of
Cimolodon nitidus. The species:
Anconodon lewisi was named by Sloan R.E. in 1987. Fossil remains were discovered in the Middle-Upper Paleocene-age strata of Keefer Hill in Wyoming and Douglass Quarry in Montana. The
holotype is from Wyoming. == References ==