Traits taxon details
original description
(of ) Ulrich, E. O. (1892). New Lower Silurian Lamellibranchiata, chiefly from Minnesota rocks. <em>The Geological and Natural History Survey of Minnesota, Annual report.</em> 19: 211-248., available online at https://hdl.handle.net/11299/56262 page(s): 226-227, textfig. 12a-d [details] 
basis of record
Ulrich, E. O.; Scofield, W. H. (1894). The Lower Silurian Lamellibranchiata of Minnesota. In: E. O. Ulrich, W. H. Scofield, J. M. Clarke & N. H. Winchell (eds), Final Report of the Geological and Natural History Survey of Minnesota, vol. 3, part 2, The Geology of Minnesota. Paleontology. p. 475–628, pl. 35–46., available online at https://www.biodiversitylibrary.org/page/14923334 page(s): 617-618, pl. 42, figs 9-14 [details]
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