Traits name details
original description
Hall, J.; Whitfield, R. P. (1877). Report of the geological exploration of the fortieth parallel. Vol. IV, Part II. Palaeontology. <em>Professional Papers of the Engineer Department, U.S. Army.</em> 18: 198-302., available online at https://www.biodiversitylibrary.org/page/36096026 page(s): 293, pl. 7, fig. 22 [details]
|