Mites occurrence on Pachira aquatica Aubl. including aspects of external mouthpart morphology of Brachytydeus formosa (Acari: Tydeidae)

Abstract

Pachira aquatica Aubl. is commonly used as an ornamental plant in urban areas of Brazil. The objective of the study was to investigate the occurrence of mites on P. aquatica, with emphasis on Brachytydeus formosa (Cooreman), and to describe aspects the external features of its mouthpart. The study was conducted in 2012 in Jaboticabal, State of São Paulo, Brazil. Ten trees of P. aquatica were selected for the experiment. Approximately 130 leaflets were collected from each tree, which were located in different quadrants (north, south, east, and west) and strata (upper, middle, and lower). The leaflets were placed in paper bags and transported to the laboratory. The mites were prepared on optical microscope slides. A total of eleven species of mites were found, belonging to eight different families. The species and genera of the organisms included B. formosa, Eutetranychus banksi (McGregor), Agistemus sp., Tyrophagus putrescentiae (Schrank, 1781), Brevipalpus phoenicis (Geijskes), Brevipalpus sp., Cheletogenes sp., Iphiseiodes zuluagai Denmark & Muma, Euseius sp., Neoseiulus sp., and only one specimen from the Bdellidae family. The predominant species was B. formosa, with 8,142 mites equally distributed among the four quadrants and mostly in the middle and upper strata of the plant. B. formosa mites from leaflets of P. aquatica were separated for the study of the external mouthpart morphology by scanning electron microscopy (SEM).Keywords: Tydeoidae, gnathosoma, Eutetranychus banksi, biodiversity, ornamental plant. Ocorrência de ácaros em Paquira aquatica Aubl. incluindo aspectos morfológicos do aparato bucal de Brachytydeus formosa (Acari: Tydeidae) ResumoPachira aquatica Aubl. é frequentemente utilizada como planta ornamental em áreas urbanas no Brasil. O objetivo do trabalho foi conhecer os ácaros associados a P. aquatica com ênfase em Brachytydeus formosa (Cooreman), bem como descrever alguns aspectos morfológicos do seu aparato bucal. O estudo foi realizado em 2012, em Jaboticabal, estado de São Paulo, Brasil. Foram selecionadas dez árvores de P. aquatica para realização do experimento. Cerca de 130 folíolos foram coletados de cada árvore localizados em diferentes quadrantes (norte, sul, leste e oeste) e estratos (superior, médio e inferior). Os folíolos foram colocados em sacos de papel e transportados para o laboratório. Os ácaros foram preparados em lâminas de microscopia óptica. No total foram encontradas onze espécies de ácaros, pertencentes a oito famílias. As espécies encontradas foram B. formosa, Eutetranychus banksi (McGregor), Agistemus sp., Tyrophagus putrescentiae (Schrank, 1781), Brevipalpus phoenicis (Geijskes), Brevipalpus sp., Cheletogenes sp., Iphiseiodes zuluagai Denmark & Muma, Euseius sp., Neoseiulus sp., e apenas um exemplar da família Bdellidae. A espécie predominante foi B. formosa, com 8.142 ácaros igualmente distribuídos nos quatro quadrantes e principalmente nos estratos médio e superior da planta. Ácaros de B. formosa dos folíolos de P. aquatica foram separados para o estudo ...

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