Nutrition
The polygyrids are believed to be predominantly mycophagous, which means
they primarily feed on fungi. Snails that were researched by Walter C. Blinn
were found to also ingest rotting wood. As well, the chief food of the snail
Mesodon thyroidus (Say), which is also in the Polygyridae family,
is wood nettle (Blinn, 1963). And since Allogona profunda (Say) is
in this family, we are able to make assumptions that Allogona profunda
(Say) may also eat wood
nettle. While doing research in Cook County,
Illinois Blinn also found ash and elm tree leaves that had evidence of
snails feeding on them (Blinn, 1963). During another one of Blinn’s research
studies, he stated that after examining the snails on a daily basis he gave
them fresh lettuce and water (Blinn, 1964).