Abundance: 0.45 to 2.76% (median 1.86%)

Latitudinal range: 44.8° to 44.9°

Habitats: (4) only

Found in 4 samples

United States: Holly's Microsite (Late Palaeocene), UMMP SC-4 (Early Eocene), UMMP SC-54 (Early Eocene), UMMP SC-67 (Early Eocene)

See also Esthonyx ancylion, Esthonyx grangeri, Esthonyx gunnelli, Esthonyx sp., Esthonyx spatularius