original descriptionPfeiffer, L. (1845). Uebersicht der mit inneren Lamellen versehenen <i>Helix</i>-Arten. <em>Zeitschrift füt Malakozoologie.</em> 2: 81–87., available online athttps://biodiversitylibrary.org/page/16291669 page(s): 86 [details]
additional sourceBenson, W. H. (1859). Notes on the animals of <i>Rhaphaulus chrysalis</i>, <i>Pupina artata</i>, <i>Otopoma clausum</i>, <i>Helix achatina</i>, and <i> H. pylaica</i>. <em>The Annals and Magazine of Natural History, Series 3.</em> 4(20): 93-96., available online athttps://www.biodiversitylibrary.org/page/2356219#page/105/mode/1up page(s): 95 [details]
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