Discus - Disc Snails (Family Discidae)
Discus is a genus of small round flattened, shells. Their umbilicus is wide open, the lip is thin but not reflected, and the shell’s surface presents with radial ridges. Of the small land snail species, some Discus can be found along trails at the bases of tree trunks or stumps with a little bit of looking.
Two other species appear in the databases. The first, Discus perspectivus (Megerle von Mühlfeld, 1816) (common name not known) is a European species. But it has from 17-47 Indiana observations in the databases, most from a few separate collectors, but it is not listed in NatureServe. It is omitted here.