Water accumulating in the axils of bromeliads provides habitat for numerous invertebrates, frequently among them, immature mosquitoes. To evaluate mosquito richness in bromeliads and the relationship between mosquito presence and biotic and abiotic variables, we performed a study in the Parque Nacional do Itatiaia, Rio de Janeiro, Brazil. Mosquitoes of genus Culex were the most abundant and varied in species richness, among which nine belonged to subgenus Microculex, Culex (Microculex) neglectus Lutz and Culex ocellatus Theobald being the most frequent species. Sabethines of genera Wyeomyia and Runchomyia were found in low numbers. Wyeomyia (Spilonympha) airosai Lane and Cerqueira and Wyeomyia (Spilonympha) finlayi Lane and Cerqueira tend to proliferate in bromeliads of the genus Bilbergia which hold less than 50 ml of water and grow either alone or with Runchomyia frontosa (Theobald). The larger the volume of water, the greater the chance of finding Culex, Anopheles as well as Wyeomyia (Phoniomyia) species, which seems to be the more generalist as it is present in different bromeliad types with a large range of plant water holding capacities.
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