WoRMS taxon details
original description
(of Planorbella imitans Gabb, 1873 †) Gabb, W. M. (1873). On the topography and geology of Santo Domingo. <em>Transactions of the American Philosophical Society, new series.</em> 15(1): 49-259, 2 maps., available online at https://www.biodiversitylibrary.org/page/46059253 page(s): 201 [details]
original description
(of Limacina elevata R. L. Collins, 1934 †) Collins, R. L. (1934). A monograph of the American Tertiary pteropod mollusks. <em>Johns Hopkins University Studies in Geology 11: 137-234.</em> [details]
additional source
Janssen, A. W. (2012). Early Pliocene heteropods and pteropods (Mollusca, Gastropoda) from Le Puget-sur-Argens (Var), France. <em>Cainozoic Research.</em> 9 (2): 145-187., available online at https://natuurtijdschriften.nl/pub/541765 [details]
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