The Neotropical genus Lenkothrips (Thysanoptera: Heterothripidae): additions to the faunas of Argentina and Brazil with an updated key to species Author Lima, Élison Fabrício B. Universidade Federal do Piauí, Campus Amílcar Ferreira Sobral, Coleção de História Natural da UFPI. BR 343, Km 3,5. Floriano, PI, Brazil. 64808 - 065. Author Zamar, María I. Instituto de Biología de la Altura, Universidad Nacional de Jujuy, Avenida Bolivia 1661, San Salvador de Jujuy, República Argentina. Author Greco, Nancy 0000-0003-3968-6604 Universidade Federal do Piauí, Campus Amílcar Ferreira Sobral, Coleção de História Natural da UFPI. BR 343, Km 3,5. Floriano, PI, Brazil. 64808 - 065. & Centro de Estudios Parasitológicos y de Vectores. Boulevard 120 s / n entre Av. 60 y Calle 64, 1900, La Plata, Buenos Aires, Argentina. ngreco@cepave.edu.ar Author Rocca, Margarita 0000-0002-0079-0634 Universidade Federal do Piauí, Campus Amílcar Ferreira Sobral, Coleção de História Natural da UFPI. BR 343, Km 3,5. Floriano, PI, Brazil. 64808 - 065. & Centro de Estudios Parasitológicos y de Vectores. Boulevard 120 s / n entre Av. 60 y Calle 64, 1900, La Plata, Buenos Aires, Argentina. & Universidade Federal do Piauí, Campus Amílcar Ferreira Sobral, Coleção de História Natural da UFPI. BR 343, Km 3,5. Floriano, PI, Brazil. 64808 - 065. & Universidade Federal do Piauí, Campus Amílcar Ferreira Sobral, Coleção de História Natural da UFPI. BR 343, Km 3,5. Floriano, PI, Brazil. 64808 - 065. mrocca@cepave.edu.ar text Zootaxa 2024 2024-07-31 5489 1 184 191 http://dx.doi.org/10.11646/zootaxa.5489.1.13 journal article 10.11646/zootaxa.5489.1.13 1175-5326 13211147 3F11DC7E-57F4-4303-8577-DF06E99CF7CB Key to Lenkothrips species (Adapted from Cavalleri & Mound (2014)) 1. Body colour yellow ( Fig. 15 )............................................................... pantanal sp. n. -. Body colour brown ( Figs 1 , 6 )........................................................................... 2 2. Fore wing uniformly brown ( Fig. 3 )...................................................................... 3 -. Fore wing with basal fourth hyaline ( Fig. 6 )................................................................ 4 3. Antennal segments VII–IX elongated [together 6.5 times longer than segment VII width]; abdominal tergite VI with posteromarginal fringe of microtrichia complete........................................................ daedali -. Antennal segments VII–IX shorter [together less than 4.5 times longer than segment VII width] ( Fig. 2 ); abdominal tergite VI with posteromarginal fringe of microtrichia incomplete medially..................................... canastra sp. n. 4. Pronotum almost smooth, or with few faint marginal lines of sculpture, bearing less than 20 discal setae................ 5 -. Pronotum with numerous lines of sculpture, bearing more than 25 discal setae ( Fig. 9 ).............................. 6 5. Hind tibiae brown medially but yellow at base and apex; fore wing banded, extensively pale distal to dark area, but with extreme apex dark; male pore plates transverse, on sternite VII about 5.0 times wider than median length........ sensitivus -. Hind tibiae clear yellow; fore wing uniformly dark brown distal to paler sub-basal area; male pore plates oval, on sternite VII usually less than 3.0 times wider than median length................................................ mollinediae 6. Sensorium on antennal segment IV extending into at least basal fifth of segment; lateral thirds of the tergites with numerous and well developed microtrichia............................................................................. 7 -. Sensorium on antennal segment IV extending only to mid-point of segment ( Fig. 7 ); microtrichia on lateral thirds of abdominal tergites scarce, evident only on the striae close to the anterior margin ( Fig. 11 )........................... moundi sp. n. 7. Antennal segments VIII & IX long and narrow, each more than 3.7 times as long as wide; antennal segment IV bicoloured, basal half yellow; fore wing setae long, median setae about 0.7 times as long as fore wing median width; male pore plates oval, on sternite VII less than 2.0 times wider than long...................................................... kaminskii -. Antennal segments VIII & IX short and broad, scarcely 3.0 times as long as wide; antennal segment IV uniformly brown, sometimes paler only in basal fifth; fore wing setae shorter, median setae scarcely 0.5 times as long as fore wing median width; male pore plates large and transverse, on sternite VII about 5.0 times wider than long..................... guaraniticus