The Trumpet or Vallonia snails are very beautiful small (1.5-3 mm) trumpet-like species, some with notable shell architecture of raised “ribs” and a reflected apertural lip. Those characters are much different than those of Triodopsis and Daedalochia, with whom they share Group E3 and the major characters of being wider than tall but depressed to discoidal, umbilicate, and with a reflected lip.

The databases give 6 species of Vallonia for Indiana but Nature Serve only lists 4. The commonest species are these three: Vallonia costata, the Costate Vallonia Snail, Vallonia excentrica, the Iroquois Vallonia Snail, and Vallonia pulchella, the Lovely Vallonia Snail. The fourth species listed in Nature Serve is Vallonia gracilicosta, the Multirib Vallonia Snail. The other two species are Vallonia parvula, the Trumpet Vallonia Snail, and Vallonia perspectiva, the Thin-lip Vallonia Snail. These last three species, though rare (if really present) in Indiana are found in Illinois. 

Among the tiny heliciform depressed-to-discoidal snails they are unique for their trumpet-like reflected lip. Their small size of course, means collecting is a bit of work, carefully examining organic debris in the forest floor.