Which of the following is NOT one of the three significant groups of mosquitoes found in Minnesota?

The correct choice is D because "Ocasius" does not correspond to a recognized genus of mosquitoes. In Minnesota, the three significant groups of mosquitoes are Aedes, Culex, and Anopheles.

Aedes mosquitoes are known for their aggressive daytime biting behavior and can transmit diseases such as West Nile virus and Zika virus. Culex mosquitoes are primarily active during dusk and dawn and are also responsible for transmitting diseases, including West Nile virus. Anopheles mosquitoes are best known for being vectors of malaria.

Recognizing these three groups is important for understanding mosquito control measures, as each type has different breeding habits, behaviors, and potential disease transmission profiles. In contrast, the name "Ocasius" does not refer to any mosquito genus that is recognized in the field of entomology, making it the correct answer to the question.