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  1. Dreissena van Beneden, 1835

    Genus, Mollusc, Freshwater, terrestrial

  2. Dreissena caspia Eichwald, 1855

    Species, Mollusc

  3. Dreissena elata Andrusov, 1897

    Species, Mollusc

  4. Dreissena polymorpha (Pallas, 1771) – Zebra Mussel non-native

    Species, Mollusc, Freshwater

    Species list: NRW Sustainable Management of Natural Resources (SMNR)

    Species list: INNS of Interest to Wales June 2022

    Species list: WFD UKTAG aquatic alien species impact

    Species list: NI Habitas species

    Species list: Non-native species of interest to Northern Ireland

    Species list: WFD UKTAG 2015 Aquatic Alien Species for Ireland

    Species list: INNS Alert list for Northern Ireland

    Species list: Invasive Species Ireland

  5. Dreissena rostriformis (Deshayes, 1838)

    Species, Mollusc

  6. Dreissena rostriformis bugensis Andrusov, 1897 – Quagga Mussel non-native

    Subspecies, Mollusc, Freshwater

    Species list: INNS - Wales Priority Species for Action

    Species list: NRW Sustainable Management of Natural Resources (SMNR)

    Species list: Contingency plan species for Wales

    Species list: INNS of Interest to Wales June 2022

    Species list: WFD UKTAG aquatic alien species impact

    Species list: WFD UKTAG Alarm species

    Species list: Non-native species of interest to Northern Ireland

    Species list: WFD UKTAG 2015 Alien Species Alarm list

    Species list: INNS Alert list for Northern Ireland

    Species list: Invasive Species Ireland

  7. Dreissenidae Gray, 1840

    Family, Mollusc, Terrestrial

  8. Mytilopsis Conrad, 1858

    Genus, Mollusc, Freshwater, terrestrial

  9. Mytilopsis leucophaeata (Conrad, 1831) – False Dark Mussel non-native

    Species, Mollusc, Freshwater

    Species list: INNS of Interest to Wales June 2022

    Species list: WFD UKTAG aquatic alien species impact

    Species list: Non-native species of interest to Northern Ireland

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