original description(ofHelix musicola Shuttleworth, 1854)Shuttleworth, R. J. (1854). Beiträge zur näheren Kenntniss der Land- und Süsswasser-Mollusken der Insel Portorico. <em>Mittheilungen der Naturforschenden Gesellschaft in Bern.</em> 1854 (314/316): 33-56., available online athttps://biodiversitylibrary.org/page/11231275 page(s): 38-39 [details]
basis of recordMartens, E. von. (1877). Land- und Süsswasser-Schnecken von Puerto Rico. <em>Jahrbücher der Deutschen Malakozoologischen Gesellschaft.</em> 4(3): 340-362, pl. 12, figs. 2-8., available online athttps://www.biodiversitylibrary.org/page/16297195 page(s): 347 [details]
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