The bloodfeeding leech genus Placobdella is dominated by North American diversity, with only a single nominal species known from Central America and one from the Palearctic region. This is likely due to considerable underestimation of Palearctic biodiversity, but investigations into potential hidden diversity are lacking. To shed light on this, the present study introduces new data for specimens initially identified as Placobdella costata from Ukraine (close to the type locality),
The Spanish slug, a species that is considered to be the most destructive pest among molluscs of Europe, is reported to spread widely across Ukraine during last 5–7 years. In addition to its 5 known colonies in Western Ukraine, over 60 new localities from Western, Central, Northern, Southern and Eastern Ukraine are reported for the first time using own materials and reports with photo from the general public. Newly reported localities include such major cities as Kyiv, Kharkiv, Donetsk, Khmelnitsky, Vinnytsia, Ternopil, Zhytomyr, Lutsk, Chernivtsi and Ivano-Frankivsk, and also the settlements in Odesa and Mykolaiv Regions. Species is also reported for the first time from Grodno City in Belarus and from Moscow City in Russia. Much wider future expansion of the Spanish slug in Eastern Europe is expected in near time.
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