| Species |
Recipient region |
Date of the first record |
|
| Pseudochattonella verruculosa | Denmark / North Sea | 1998 |  |
| Pseudochattonella verruculosa | Germany / North Sea | 1998 | |
| Pseudochattonella verruculosa | Greece / Central Mediterranean | 1998 | |
| Pseudochattonella verruculosa | Greece / Eastern Mediterranean | 2000 - 2001 | |
| Pseudochattonella verruculosa | Norway / North Sea | 1998 | |
| Pseudocuma (Stenocuma) graciloides | Russia / Baltic Sea / St. Petersburg area | 2004 | |
| Pseudodactylogyrus anguillae | Denmark / Baltic Sea | 1985 | |
| Pseudodactylogyrus anguillae | Denmark / North Sea | 1985 | |
| Pseudodactylogyrus anguillae | France / Biscay Gulf | 1984 | |
| Pseudodactylogyrus anguillae | France / Celtic seas | 1984 | |
| Pseudodactylogyrus anguillae | France / English Channel | 1984 | |
| Pseudodactylogyrus anguillae | France / North Sea | 1984 | |
| Pseudodactylogyrus anguillae | France / Western Mediterranean | 1984 | |
| Pseudodactylogyrus anguillae | Germany / North Sea | To 1995 | |
| Pseudodactylogyrus anguillae | Norway / North Sea | 1990 - 1999 | |
| Pseudodactylogyrus anguillae | Poland | 1985 | |
| 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 kempi japonica | France / Biscay Gulf | 2004 | |
| Pseudopolydora paucibranchiata | Australia / Bass strait | 1978 | |
| Pseudopolydora paucibranchiata | Faroe Islands | 1987 | |
| Pseudopolydora paucibranchiata | Greece / Eastern Mediterranean | 2005 | |
| Pseudopolydora paucibranchiata | Italy / Western Mediterranean | 1977 | |
