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Among host plants of Lixinae weevils, plant life-form ratio (sensu Raunkiaer) is similar to the plant spectrum of Mediterranean deserts. A possible explanation is that this group of insects formed in desert zones and settled in the steppe rather later. For the first time Raunkiaer’s life-form ratio is compared with a spectrum of food plants of herbivores. This approach may be useful for reconstruction of the genesis of taxa and communities.