Abundance: 0.97 to 1.52% (median 1.25%)

Latitudinal range: 41.5° to 51.5°

Habitats: (3) only

Found in 3 samples

United Kingdom: Abbey Wood (Early Eocene)

United States: UMMP SC-67 (Early Eocene), Cooper Creek (Early Eocene)

See also Prototomus deimos, Prototomus girardoti, Prototomus secundarius