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Large black slug on lettuce leaf
New Zealand flatworm

New Zealand flatworm

The New Zealand flatworm (Arthurdendyus triangulatus) was first noted in Northern Ireland and the western parts of Scotland in the early 1960s. On the drier, eastern side of Scotland there have been fewer sightings. Flatworms have now been identified at points throughout the UK. Results of a recent survey compiled in September 2003, has shown sightings of this pest in central and southern England. In its native New Zealand, the flatworm is found in shady, wooded areas and only on the cooler South Island. Open, sunny pasture land is too hot and dry; temperatures over 20°C are lethal to this creature. Flatworms were probably introduced into the UK in the soil in pot plants sent or brought from New Zealand.

New Zealand flatworm

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