A phenetic study of the genus Rasahus (Amyot and Serville) (Heteroptera, Reduviidae)

COSCARON, MC

Entomológica Fennica

Entomological Society of Finland

Año: 1990 p. 131 - 144

0785-8760

Cluster analysis by four methods and a principal component analysis were performed using data on 24 morphological characters of 27 species of the genus Rasahus (Peiratinae). The results obtained by the different techniques show general agreement. They confirm the present number of taxa and real the existence within the genus of three group of species: scutellaris, hamatus and vittatus. The scutellaris group is constituted by R. aeneus (Walker), R. maculipennis (Lepelletier and Serville), R. bifurcatus Champion, R. castaneus Coscarón, R. guttatipenis (Stål), R. flavovittatus Stål, R. costarricenses Coscarón, R. scutellaris (Fabricius), R. atratus Coscarón, R. peruensis Coscarón, R. paraguayensis Coscarón, R. surinamensis Coscarón, R. albomaculatus Mayr, R. brasiliensis Coscarón  and R. sulcicollis (Serville). The hamatus group contains R. rufiventris (Walker), R. hamatus (Fabricius), R. amapaensis Coscarón, R. arcitenens Stål, R. limai Pinto, R. angulatus Coscarón, R. thoracicus Stål, R. biguttatus (Say), R. arcuiger (Stål), R. argentinensis Coscarón and R. grandis Fallou. The vittatus group contains R. vittatus Coscarón. The characters used to separate the group of species are: shape of the pygophore, shape of the parameres, basal plate complexity, shape of the postocular regin and hemelytra pattern. Illustrations of the structures of major diagnostic importance are included.