1) Arthropod genus 2) Genus chironomus 
Chironomus is a genus of non-biting midges in the subfamily Chironominae of the bloodworm family, Chironomidae containing several cryptic species that can only be distinguished by experts based on the characteristics of their giant chromosomes. ...
Genus of flies (midges). Larvae live in fresh water and have been much studied because of the giant polytene chromosomes in the salivary glands; haemolymphcontains haemoglobin in solution.
[n] - type genus of the Chironomidae
genus Chironomus noun type genus of the Chironomidae