Traits taxon details
original description
Ulrich, E. O.; Foerste, A. F.; Miller, A. K.; Unklesbay, A. G. (1944). Ozarkian and Canadian Cephalopods: Part III: Longicones and Summary. <em>Geological Society of America Special Papers.</em> 59: 1-226., available online at https://doi.org/10.1130/spe58 page(s): 48, pl. 7, figs 5-6 [details] Available for editors 
basis of record
Kröger, B.; Landing, E. (2009). Cephalopods and paleoenvironments of the Fort Cassin Formation (upper Lower Ordovician), eastern New York and adjacent Vermont. <em>Journal of Paleontology.</em> 83(5): 664-693., available online at https://doi.org/10.1666/08-181.1 [details] Available for editors 
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