Chaoborus astictopus, the Clear Lake gnat, is a species of phantom midges in the family Chaoboridae.

[1][2][3][4] The older larvae are commonly found in the profundal zone of lakes during the day and in the open waters at night, suggesting that they are negatively phototactic.

[5] The larvae can be vulnerable to the pathogen Thelohania corethrae during the winter season.

[6] They are also susceptible to the fungal pathogen Tolypocladium cylindrosporum.

This article related to members of the fly superfamily Culicoidea is a stub.