basis of recordHenderson, J. (1935). Fossil non-marine Mollusca of North America. <em>Geological Society of America Special Papers.</em> 3: 1-313. page(s): 62 [details] Available for editors [request]
Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Classification Genus established for "trails of annelids", sometimes treated as mollusc trails. Henderson (1935) believed them to be tracks of freshwater bivalves and classified the genus in the Unionidae. [details] Type locality Turners Falls, Massachusetts, USA; Triassic [details]
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