Traits taxon details
original description
(of ) Emmons, E. (1842). Geology of New-York. Part II. Comprising the survey of the second geological district. New York State Geological Survey, Albany, 429 pp., available online at https://books.google.de/books?id=oW4_AAAAcAAJ page(s): 312, textfig. 4 [details]
basis of record
Hall J. (1847). Palaeontology of New York, vol. 1, Containing descriptions of the organic remains of the lower division of the New York system, (equivalent of the Lower Silurian rocks of Europe). <em>Albany: C. van Benthuysen.</em> xxiii+1-338., available online at https://biodiversitylibrary.org/page/55227010 page(s): 32-33, pl. 6, fig. 10, 10a [details]
additional source
Wagner P.J. (2023). Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). <em>The Paleobiology Database.</em> , available online at https://paleobiodb.org/classic/displayReference?reference_no=9042 [details]
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