New records of the cicada genus Fidicinoides Boulard and Martinelli, 1996 (Hemiptera: Cicadidae: Fidicinini) from the state of Mato Grosso, Brazil

: Fidicinoides picea (Walker, 1850) and Fidicinoides poulaini Boulard and Martinelli, 1996 are recorded for the first time from the state of Mato Grosso, extending the known distribution of these species to the south. Thereby, the number of Fidicinoides species from Mato Grosso is increased to nine, being Mato Grosso the state with the largest number of recorded species of this genus in Brazil.

Cicadas (Hemiptera: Cicadoidea) are large insects that are known for the distinctive sound that they emit. Currently, in Brazil, the occurrence of 156 species is reported (Sanborn 2008;Santos and Martinelli 2009a, b;Santos et al. 2010;Maccagnan et al. 2011;Sanborn 2011a;Boulard and Martinelli 2011). However, this number is certainly underestimated due to the low number of studies on local fauna, which directly affects the information about the distribution of these species.
The tribe Fidicini (Distant, 1905) is represented by sixteen Neotropical genera and was reviewed by Boulard and Martinelli (1996) who described the new genus Fidicinoides, considered sister group to Fidicina Amyot and Audinet-Serville, 1843. Fidicinoides differs from Fidicina by the short and narrow lateral meta-scutellar plates which do not completely cover the timbal cavities, in contrast with Fidicina where the lateral meta-scutellar plates are long and wide, closing the timbal cavities. Since its erection, several species have been transferred from Fidicina to Fidicinoides, and new species have been described (Boulard andMartinelli 1996, Sanborn 2007a, b;2008a;Sanborn et al. 2008;Santos and Martinelli 2009a, b;Santos et al. 2010). Currently, the genus Fidicinoides is considered the richest of the tribe, being represented by 35 species, 25 of which occur in Brazil (Santos et al. 2010).
Several Fidicinoides specimens were collected in the municipality of Sorriso, state of Mato Grosso, Brazil (12° 40' S, 55° 43' W) with the use of light traps, model "Luiz de Queiroz", set up with lamps F15T8BL (Silveira Neto et al. 1976). The traps were installed in cultivated areas with soybean surrounded by forest fragments. They remained in the field for two consecutive nights per week between the months of September and February, during the years of 2005 and 2008, totalizing eighteen months of collection. The examined material was deposited in the Entomology Collection of the Phytosanitation Department of the The principal character analyzed was the male genitalia that was compared with the original representations drawn in Boulard and Martinelli (1996) and Santos and Martinelli (2009b). For the study of the male genitalia, the abdomen was cut open with the aid of pincers, heated in a double-boiler in a solution of potassium hydroxide (5% KOH) for approximately 30 minutes and subsequently washed in distilled water. The genitalia were then placed in appropriately labeled eppendorf-type plastic tubes with glycerine (60%).
From the examined material, five species belonging to the genus Fidicinoides were identified.
To complete its development, nymphs of cicadas suck sap from the root of their host plant. In general this nymphal stage lasts several years (Boulard 1965, Pachas 1966, Logan 2006. Since soybean is a seasonal crop, with only a few months from planting to harvesting, the full development of cicadas should not be possible on soybean. Although the traps were set in a soybean cultivated area, we can assume that all cicadas collected were attracted from the nearby forest. The new records in this paper bring the total to nine species of Fidicinoides recorded from the state of Mato Grosso, which becomes the state with the largest number of Fidicinoides species in Brazil (Table 1).