L. fasciculata's shells range from the size of a grain of sand to a sunflower seed, and the researchers were able to recover more than 200 of them with the telltale holes of a perforating predator.

Also known as the sand-grain snail for its resemblance to a grain of sand, the Ichetucknee siltsnail is a tiny freshwater snail native to Florida — just 2 or 3 millimeters wide with a translucent, ...