The pupal exuviae of Chironomus crassimanus Strenzke (Diptera: Chironomidae), an acid-resistant species from Germany

The first descriptions of the pupal exuviae of Chironomus crassimanus Strenzke, 1959 were based on mixed populations of Chironomus which did not allow a proper recognition of their features in the available taxonomical keys. This paper describes the morphological characteristics of Ch. crassimanus based on laboratory-reared specimens. A more comprehensive description is ensued and ecological information on the species is also provided.