Photo of an apertural view of a shell of <i>Pupilla muscorum</i> from Brno, Czech Republic. The width of the shell is 1.71 mm. The height of the shell is 3.62 mm. Scale bar is 1 mm.
Michal Horsák, Veronika Schenková, Jan Myšák
CC BY 4.0
Horsák M., Schenková V. &amp; Myšák J. (2012). "The second site of <i>Pupilla alpicola</i> (Charpentier, 1837) and the first recent record of <i>Pupilla pratensis</i> (Clessin, 1871) in Poland". <i>Folia Malacologica</i> <b>20</b>(1): 21-26. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.2478%2Fv10125-012-0003-5">10.2478/v10125-012-0003-5</a>. Figure 5.