References in periodicals archive ?
Horsehair worms have not been recently documented from Missouri, and they have not been previously reported from Fillmore County, Minnesota.
difficilis was found in one of two brown trout (26-28 cm long) collected by angling on 18 June 2000 in an unnamed tributary to Diamond Creek, Fillmore County, Minnesota.
difficilis were found in one of three brown trout (20-35 cm long) collected by angling on 19 June 2000 in Gribben Creek along County Road 23, Fillmore County, Minnesota.