He was a strong proponent of the glacial refugium hypothesis and made use of the framework to explain the distribution patterns of Scandinavian beetles.
He continued to work extensively on the Carabidae ground beetle and examined its distribution in the light of past climatic changes.
[4][5][6] Lindroth also examined cuticular microsculpture patterns on the elytra of beetles and introduced their use, especially for the identification of fossil species.
He wrote a book for children, Myran Emma, in 1948, which was made into a short animated film by Jaromir Wesely in 1989.
[1] In 2007, the Society for Applied Carabidology instituted the Carl H. Lindroth Prize to honor the work of present-day carabidologists.