Jackson, R.W. (1948). New subspecies of <em>Helicostyla</em> from Mindoro, and of <em>Polygyra</em> from Florida. <em>The Nautilus.</em> 62(2): 40-41., available online athttps://www.biodiversitylibrary.org/page/8519579 page(s): 40-41 [details]
original descriptionJackson, R.W. (1948). New subspecies of <em>Helicostyla</em> from Mindoro, and of <em>Polygyra</em> from Florida. <em>The Nautilus.</em> 62(2): 40-41., available online athttps://www.biodiversitylibrary.org/page/8519579 page(s): 40-41 [details]