Chilostigma itascae

Chilostigma itascae, also known as the headwaters chilostigman, is a species of caddisfly in the family Limnephilidae. It is known only from mile-long Nicollet Creek in the Mississippi River's headwaters in Itasca State Park, Minnesota. It was discovered by Glenn Wiggins, a scientist from the Royal Ontario Museum, on New Year's Eve of 1974, and was scientifically described by him in the following year. Unlike other caddisflies, its adult emergence occurs in the winter.