MolluscaBase name details
basis of record
Low, M. E. Y., Tan, S. K. & Ng, T. H. (2013). <i>Pila conica</i> (Wood, 1828), or <i>Pila scutata</i> (Mousson, 1848)? The correct name for the native apple snail of Singapore (Gastropoda Ampullariidae). <em>Nature in Singapore.</em> 6: 55-60., available online at http://rmbr.nus.edu.sg/nis/bulletin2013/2013nis055-060.pdf [details]
additional source
Letson, J. E. (1897). Sinistral <i>Ampullaria</i>. <em>The Nautilus.</em> 11(3): 33-34., available online at https://www.biodiversitylibrary.org/page/1774607 [details]