Entomological and Ecological Aspects of Six Sylvatic Speciesof Triatomines (Hemiptera, Reduviidae) from the Collectionof the National Biodiversity Institute of Costa Rica,Central America

Rodrigo Zeledón Jesús A Ugalde Luis A Paniagua; Jesús A Ugalde; Luis A Paniagua

A total of 797 specimens of wild adult triatomines, belonging to six species from the entomologicalcollections of the Costa Rican National Biodiversity Institute, was studied from the standpoint of theirrelative abundance, as reflected by light traps, distribution in the country, seasonal variations andclimatic and altitudinal preferences.Triatoma dimidiata was the most abundant species (32.9 percent of the total specimens), with a very extensive distribution in different ecological zones, being more common between 100 to 400 m above sealevel mainly at the end of the dry season. T. dispar was the third in frequency (21.5 percent), with narrowerdistribution, more abundant between 600 to 800 m and scarce during the dry season. Panstrongylusgeniculatus and P. rufotuberculatus, second and fourth in frequency (22.1 percent and 15.1 percent, respectively),were widely distributed on both the Pacific and Caribbean basins, the former being more commonbetween 80 to 270 m all year round and the latter below 800 m mainly during the first semester. Eratyruscuspidatus which represented only 4.9 percent of the insects, was also present on both basins mainly below200 m with a tendency to be scarce during certain months of the year, and was found in all types ofecological zones. Finally, Rhodnius pallescens, the least abundant species (3.6 percent) was restricted to veryhumid areas below 20 m, on the north side and Caribbean basin. With the exception of R. pallescens,males were more commonly found than females. Some epidemiological implications related to the sixspecies are discussed

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Entomological and Ecological Aspects of Six Sylvatic Speciesof Triatomines (Hemiptera, Reduviidae) from the Collectionof the National Biodiversity Institute of Costa Rica,Central America

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