URMO taxon details
original description
(of ) Henderson, J. B. (1920). A monograph of the east American scaphopod mollusks. <em>United States National Museum Bulletin.</em> 111(20): 1-177., available online at http://www.biodiversitylibrary.org/item/33255 page(s): 123-124, pl. 18, fig. 11 [details]
From other sources
Depth range shelf, bathyal [details]
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