| Species |
Recipient region |
Date of the first record |
|
| Pseudodactylogyrus anguillae | Russia / Baltic Sea / Kaliningrad area | 2002 |  |
| Pseudodactylogyrus anguillae | Sweden / North Sea | 1985 | |
| Pseudodactylogyrus bini | Germany / North Sea | To 1995 | |
| Pseudodactylogyrus bini | Norway / North Sea | 1990 - 1999 | |
| Pseudodactylogyrus bini | Poland | 1985 | |
| Pseudodiaptomus marinus | Belgium | 2015 | |
| Pseudodiaptomus marinus | Denmark / Baltic Sea | 2021 | |
| Pseudodiaptomus marinus | Denmark / North Sea | 2018 | |
| Pseudodiaptomus marinus | France / Biscay Gulf | 2010 | |
| Pseudodiaptomus marinus | France / English Channel | 2010 | |
| Pseudodiaptomus marinus | France / North Sea | 2010 | |
| Pseudodiaptomus marinus | France / Western Mediterranean | 2008 | |
| Pseudodiaptomus marinus | Germany / North Sea | 2011 | |
| Pseudodiaptomus marinus | Italy / Adriatic Sea | 2007 | |
| Pseudodiaptomus marinus | Italy / Central Mediterranean | 2008 | |
| Pseudodiaptomus marinus | Italy / Western Mediterranean | 2008 | |
| Pseudodiaptomus marinus | Netherlands | 2011 | |
| Pseudodiaptomus marinus | Portugal / Iberian Coastal | To 2020 | |
| Pseudodiaptomus marinus | Spain / Iberian Coastal | To 2020 | |
| Pseudodiaptomus marinus | United Kingdom (Britain) / English Channel | To 2011 | |
| Pseudolithoderma roscoffense | United Kingdom (Britain) / English Channel | 1973 | |
| Pseudominolia nedyma | Israel | 1966 | |
| Pseudomyicola spinosus | France / Biscay Gulf | 1963 | |
| Pseudomyicola spinosus | France / Celtic seas | 1963 | |
| Pseudomyicola spinosus | France / Western Mediterranean | 1951 | |
| Pseudonereis anomala | Greece / Central Mediterranean | 2003 | |
| Pseudonereis anomala | Greece / Eastern Mediterranean | 2003 | |
| Pseudonereis anomala | Israel | 1937 | |
| Pseudonereis anomala | Italy / Central Mediterranean | 2013 | |
| Pseudopolydora paucibranchiata | Australia / Bass strait | 1978 | |
| Pseudopolydora paucibranchiata | Faroe Islands | 1987 | |
| Pseudopolydora paucibranchiata | Greece / Eastern Mediterranean | 2005 | |
| Pseudopolydora paucibranchiata | Italy / Western Mediterranean | 1977 | |
| Pseudopolydora paucibranchiata | Netherlands | To 2015 | |
| Pseudopolydora paucibranchiata | Norway / North Sea | To 1979 | |
| Pseudopolydora paucibranchiata | Norway / Norwegian Sea | To 1991 | |
| Pseudopolydora paucibranchiata | Portugal / Iberian Coastal | 2005 | |
| Pseudopolydora paucibranchiata | Spain / Iberian Coastal | To 2011 | |
| Pseudopolydora paucibranchiata | United Kingdom (Britain) / Celtic seas | To 1960 | |
| Pseudorhaphitoma iodolabiata | Israel | 2010 | |
| Pseudosolenia calcar-avis | Bulgaria | 1926 | |
| Pseudosolenia calcar-avis | Denmark / Baltic Sea | 2009 | |
| Pseudosolenia calcar-avis | Denmark / North Sea | 2009 | |
| Pseudosolenia calcar-avis | Georgia | 1993 | |
| Pseudosolenia calcar-avis | Germany / Baltic Sea | To 2010 | |
| Pseudosolenia calcar-avis | Romania | 1900 - 1909 | |
| Pseudosolenia calcar-avis | Russia / Black Sea | 1926 | |
| Pseudosolenia calcar-avis | Russia / Caspian Sea | 1934 | |
| Pseudosolenia calcar-avis | Turkey / Black Sea | 1996 | |
| Pseudosolenia calcar-avis | Ukraine / Azov Sea | From 1924 | |
