Blue monkey beetles are important pollinators of the Namaqualand region, especially for Mesembryanthemum and some daisy species, on which they primarily feed.
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Flowers of the genus Mesembryanthemum are common hosts of S. trimeni, as are many of the African daisy species and some Heliophila.
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S. trimeni prefers the sandy and coastal regions of Namaqualand, such as Knersvlakte and Port Nolloth, respectively.