Abstract
The leafhoppers included in the Cicadellini are distributed all over the world, with approximately 1,100 species and 164 genera (Mejdalani, 1998) recorded from the New World. Since the generic revision of Cicadellini by Young (1977), where he redefined the known genera and erected many new ones (91), only eleven new genera (and approximately 70 new species) have been described or revalidated from the New World (Cavichioli 1996, 1998, 2000a, 2000b and 2003; Hamilton 1985; Mejdalani 1994; Nielson and Godoy 1995; Takiya et al. 2001,2003; Takiya and Cavichioli, 2005). In the present paper, a new genus and new species are proposed from Santa Catarina and Rio Grande do Sul states of Southern Brazil. This new species was collected in Citrus orchards from Santa Catarina and grapevines from Rio Grande do Sul. This species is a xylem sap specialist, like all other species of the subfamily, and a potential vector of Xylella fastidiosa. However, this species is not a proven efficient vector of this bacterium. Specimens of the new species will not key beyond couplet 145 in Young`s (1977) key to the New World genera, because only the median anteapical cell of the forewing is open basally. The combination of characters of the male and female genitalia warrants its formal description and placement in a new genus.
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