Abstract
The present investigation revealed the existence of hybrids belonging to the Culex pipiens Complex in four localities of La Pampa Province, Argentina, thus expanding the distribution of the hybrid form south to the northeast of that province. The identification was based on characters of the male genitalia and the siphonal index of the fourth-instar larval exuviae. A summary of the geographical distribution of species of Culex pipiens complex in Argentina is also presented here.
Highlights
In Argentina, Culex pipens Complex is represented by: Culex (Culex) quinquefasciatus Say, Culex (Culex) pipiens Linnaeus, and hybrids between the two species
We investigated two pneumatic-tire yards and the local cemetery
On the basis of the present findings, the distribution of hybrids of the Culex pipiens Complex in Republic of Argentina extends to the latitude 36°13’37” S, corresponding to the above detections within Winifreda in La Pampa Province. From these results and registers from the published literature, hybrids of Culex pipiens Complex occur between latitudes 30° 36’ S (Huascha, Córdoba Province, Brewer et al 1987) and 36°13’ S (Winifreda, La Pampa Province), and between longitudes 57° 57’ W (La Plata, Buenos Aires Province; Morais et al 2010) and 64°48’ W (Cruz del Eje, Córdoba Province, Brewer et al 1987)
Summary
In Argentina, Culex pipens Complex is represented by: Culex (Culex) quinquefasciatus Say, Culex (Culex) pipiens Linnaeus, and hybrids between the two species. Culex quinquefasciatus (Carpintero and Leguizamón, 2004) and Cx. pipiens (Diez et al 2011) were recorded in La Pampa Province, no hybrids were found there.
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