Abundance: 0.21 to 9.71% (median 3.03%)

Latitudinal range: 41.5° to 45.1°

Habitats: (5) only

Found in 5 samples

United States: Bear Creek (Late Palaeocene), Holly's Microsite (Late Palaeocene), UMMP SC-4 (Early Eocene), UMMP SC-54 (Early Eocene), Cooper Creek (Early Eocene)

See also Haplomylus palustris, Haplomylus simpsoni, Haplomylus speirianus