The polytene chromosomes of Cnsia dissimilis (Edwards) and three species of Gigantodax Enderlein (Diptera: Simuliidae) from Lanin National Park (Argentina)

ABSTRACT

Cytological studies were made on larvae of Giagantodax marginalis. G. chilensis, G. fulvescens and Cnesia dissimilis from four creeks in Lanin National Park, Neuquen Province, Argentina. Chromosome maps and idiograms of these species are presented. The following inversions were observed G. marginalis IL-1 (X-linked inversion), IL-2 (Y-linked inversion), IIS-1.2, IIL-1, IIIL-4,5; G. chilinsis IL-4 (X-linked inversions), IIS-1.2, IIIL-4,5; G. fulvescens IL-1 (X-linked inversion), IL-3 (Y-linked inversion), IIS-1.2, IIL-1, IIIL-4,5; C. dissimilis IL-1, IL-5, IIIL-1. Karyological information was used to construct a cladogram and Cnesia sp. Was found to show close resemblance to the three Gigantodax spp.