60. Genus Culex and genus Anopheles: morphological differences. Phlebotomus papatasii.
Compares the mosquito genera Culex and Anopheles, covering their disease transmission, adult structure and life cycle, then their eggs, larvae and pupae in turn. A comparison table sets the two genera side by side across adult, egg, larva and pupa stages. The note closes with the sand fly Phlebotomus papatasi, outlining its role in transmitting leishmaniasis, its size and appearance, and its life cycle.
Topic 60 of 64 in the MU Sofia syllabus for Biology (Dental Medicine, Year 1). The free AceMed note covers it in 2 sections, about 293 words (3 min of reading).
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Genus Culex and Anopheles
Phlebotomus Papatasi (Sand Fly)
Genus Culex and Anopheles
Culex
Disease Vector: Known for transmitting multiple infections such as West Nile virus, various forms of encephalitis, and filariasis.
Anopheles
Disease Vector: Specifically known for transmitting Plasmodium falciparum, the parasite responsible for malaria.
Morphology of Culex and Anopheles
Adult Structure: Both have a head, thorax, and abdomen with two forewings and a pair of reduced wings known as halteres, which help in balance during flight.
Life Cycle
Egg Laying: Females lay eggs that hatch in water; larvae are obligately aquatic.
Larval Stage: Feed off particles and organic matter in water.
Pupal Development: After the larval stage, they develop into pupae, transforming into adults after a few days.
Morphological Differences
Eggs: Anopheles eggs are elongated and float on the water surface due to lateral air-filled chambers. Culex eggs are laid in rafts that float on water.
Larvae: Anopheles larvae lie parallel to the water surface, while Culex larvae hang at an angle due to their siphon tubes used for breathing.
Pupae: Both have comma-shaped pupae, but Anopheles pupae are generally less buoyant compared to Culex.
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