The objectives of this study are to identify thrips and their biological controllers, to analyze their abundance in three flower opening stages stages of chrysanthemum crops, and to determine alpha and beta diversity in two ecoregions of Jujuy province (Argentina). The study was carried out in the Chaco ecoregion (ECH) in October and November 2016, and in the Prepuna ecoregion (EP) in February and March 2018. On each date, six replicates of five flowers were excised in the stages: flower bud , semi-open flower and open flower. Diversity profiles and rank-abundance curves were built, and Jaccard's coefficient of similarity was applied. The diversity profiles showed significant differences in thrips communities. In the ECH, 15 thrips species were identified; the dominant and permanent species were Microcephalothrips abdominalis (Crawford) and Frankliniella occidentalis (Pergande). Five species were recorded in the EP, although Frankliniella gemina Bagnall and Thrips tabaci Lindeman on their own represented 78% of the total abundance. In the ECH, 20 entomophagous species/morphospecies were recognized, and 19 in the EP; antocorids were dominant in both ecoregions. The thrips and the entomophagous communities of chrysanthemum flowers were different (34%) between the ecoregions studied.

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Acta zoológica lilloana 62 (2): 1-11, 7 de diciembre 2018 Nuevos registros de Thripidae (Thysanoptera: Terebrantia) del noroeste de Argentina ä Resumen -Este trabajo proporciona cuatro nuevos registros de Thripidae para Argentina, pertenecientes a Sericothripinae (Neohydatothrips portoricensis (Morgan) y Neohydatothrips hemileucus (Hood)) y Thripinae (Chaetisothrips striatus Hood y Scirtidothrips torquatus Hood). Los ejemplares fueron recolectados en provincias del noroeste argentino (Tucumán y Jujuy). Se describen e ilustran sus características morfológicas generales, y se presentan datos sobre la distribución y plantas hospederas de cada especie.Palabras clave: Interacciones planta-animal, biodiversidad, plantas hospederas, Sericothripinae, Thripinae.ä Abstract -This work provides four new records of Thripidae in Argentina which belong to Sericothripinae (Neohydatothrips portoricensis (Morgan) and Neohydatothrips hemileucus (Hood)) and Thripinae (Chaetisothrips striatus Hood and Scirtidothrips torquatus Hood). Specimens were collected in northwestern provinces of Argentina (Tucumán and Jujuy). Their general morphological characteristics are described and illustrated, as well as information on their distribution and the host plants for each species are presented. ä Ref. bibliográfica: Zamar, M. I.; Funes, C.; Kirschbaum, D.; Tapia S.; Alejo, G. 2018. Nuevos registros de Thripidae (Thysanoptera: Terebrantia) del noroeste de Argentina. Acta zoológica lilloana 62 (2): 1-11. ä Recibido: 15/02/18 -Aceptado: 03/08/18 ä URL de la revista: http://actazoologica.lillo.org.ar ä Algunos derechos reser vados. Esta obra está bajo una Licencia Creative Commons Atribución -No Comercial -Sin Obra Derivada 4.0 Internacional. D . O . I . : h t t p s : / / d o i . o r g / 1 0 . 3 0 5 5 0 / j . a z l / 2 0 1 8 . 6 2 . 2 / 1