Tristeirometa decussata is a moth of the family Geometridae first described by Frederic Moore in 1868. It is found in north-eastern India and Taiwan.
The larvae feed on the leaves of Rosa, Citrus and Malus species. Subspecies Tristeirometa decussata decussata (India) Tristeirometa decussata moltrechti (Prout, 1958) (Taiwan)
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