Traits name details
original description
(of ) Ulrich, E. O.; Foerste, A. F. (1931). Paleontology of Late Cambrian and Early Ordovician formations in Missouri. <em>Missouri Bureau of Geology and Mines.</em> 24: 186-228. page(s): 211, pl. 21, fig. 14 [details]
basis of record
Flower, R. H. (1964). The nautiloid order Ellesmeroceratida (Cephalopoda). <em>State Bureau of Mines and Mineral Resources New Mexico Institute of Mining and Technology, Memoir.</em> 12: 1-234., available online at https://geoinfo.nmt.edu/publications/monographs/memoirs/downloads/12/Memoir-12.pdf [details]
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