Abstract
Two new species of the genus Eutetranychus Banks are described and illustrated based on adult females and males, E.spinosussp. n. from Indigoferaspinosa Forssk (Leguminosae), E.neotransversussp. n. from Juniperusprocera Hochst. ex Endl. (Cupressaceae), and E.palmatus Attiah, 1967 is redescribed from Washingtoniarobusta H. Wendl. (Arecaceae). Additionally, the intraspecific morphological variations within E.orientalis populations, collected from 28 various host plants and 80 different localities from six regions of Saudi Arabia from 2009 to 2017, are discussed and presented. The genus Eutetranychus is divided into two species groups based on the presence of one seta (orientalis group) or two setae (banksi group) on coxa II. In addition, seven Eutetranychus species are suggested as synonyms of E.orientalis (Klein, 1936) and E.papayensis Iqbal & Ali, 2008 is considered as species inquirenda. A key to all known species of the genus Eutetranychus is provided.
Highlights
The spider mites belonging to the genus Eutetranychus (Acari: Tetranychidae) mostly feed on shrub and tree leaves (Jeppson et al 1975, Bolland et al 1998) and make little webs on plant leaves (Saito 2010, Vacante 2010)
Four Eutetranychus species viz. E. africanus (Tucker), E. banksi, E. orientalis and E. palmatus have been reported from Saudi Arabia (SA) so far (Martin 1972, Alatawi 2011)
Morphological variations of Eutetranychus orientalis in 91 female specimens that were collected from 28 various host plants and 80 different localities in six regions of Saudi Arabia during 2009 to 2017 are shown in Figures 47A−H, 48, and 49
Summary
The spider mites belonging to the genus Eutetranychus (Acari: Tetranychidae) mostly feed on shrub and tree leaves (Jeppson et al 1975, Bolland et al 1998) and make little webs on plant leaves (Saito 2010, Vacante 2010). E. palmatus Attiah was considered as a pest of date palms in Israel (Palevsky et al 2010). It has been reported from different palms (Arecaceae) from Egypt, Israel, Jordan, and Iran (Attiah 1967, Gerson et al 1983, Kamali 1990, Ben-David et al 2013). McGregor (1950) proposed Eutetranychus as valid and separated genus with type species Tetranychus banksi. Four Eutetranychus species viz. E_africanus (Tucker), E. banksi, E. orientalis and E. palmatus have been reported from Saudi Arabia (SA) so far (Martin 1972, Alatawi 2011)
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