Which of the following lists all Aedes species that are multivoltine?

• A. Ae. taeniorynchus, Ae. vexans
• B. Ae. squamiger, Ae. washinoi
• C. Ae. aegypti, Ae. albopictus
• D. Ae. dorsalis, Ae. squamiger

Answer: (A)

Multivoltine means a mosquito can produce several generations in one year when conditions are favorable, especially warm temperatures and abundant breeding sites. Ae. vexans is a classic example: after rains, numerous ephemeral floodwater habitats form, allowing rapid, repeated breeding cycles and multiple generations within a single season. Ae. taeniorynchus is described in this course's materials as capable of more than one generation per year under suitable temperatures and habitats. Together, these two species are the ones identified as multivoltine in typical study contexts. The other options include species whose generation number isn’t consistently multiple per year across common climates, so they don’t form a complete multivoltine pair in this framework.