| Species |
Recipient region |
Date of the first record |
|
| Antithamnionella spirographidis | France / English Channel | 1927 |  |
| Antithamnionella spirographidis | France / Western Mediterranean | 2004 | |
| Antithamnionella spirographidis | Germany / North Sea | 2012 | |
| Antithamnionella spirographidis | Greece / Central Mediterranean | 1983 | |
| Antithamnionella spirographidis | Greece / Eastern Mediterranean | 1992 | |
| Antithamnionella spirographidis | Ireland | 1969 | |
| Antithamnionella spirographidis | Italy / Adriatic Sea | 1995 | |
| Antithamnionella spirographidis | Netherlands | 1974 | |
| Antithamnionella spirographidis | Portugal / Iberian Coastal | 2003 - 2008 | |
| Antithamnionella spirographidis | Portugal / Madeira | To 1974 | |
| Antithamnionella spirographidis | Spain / Iberian Coastal | 1927 | |
| Antithamnionella spirographidis | United Kingdom (Britain) / English Channel | To 1911 | |
| Antithamnionella ternifolia | Australia / Bass strait | 1977 | |
| Antithamnionella ternifolia | Belgium | 1970 | |
| Antithamnionella ternifolia | Denmark / Baltic Sea | 2014 | |
| Antithamnionella ternifolia | France / Biscay Gulf | 1969 | |
| Antithamnionella ternifolia | France / Celtic seas | 1910 | |
| Antithamnionella ternifolia | France / English Channel | 1910 | |
| Antithamnionella ternifolia | France / Western Mediterranean | 1981 | |
| Antithamnionella ternifolia | Germany / Baltic Sea | 2014 | |
| Antithamnionella ternifolia | Germany / North Sea | 1958 | |
| Antithamnionella ternifolia | Ireland | 1930 | |
| Antithamnionella ternifolia | Netherlands | 1951 | |
| Antithamnionella ternifolia | New Zealand / New Zealand Shelf / North Island | To 1972 | |
| Antithamnionella ternifolia | New Zealand / New Zealand Shelf / South Island | To 1904 | |
| Antithamnionella ternifolia | Portugal / Azores | 1987 | |
| Antithamnionella ternifolia | Portugal / Iberian Coastal | 1958 | |
| Antithamnionella ternifolia | Spain / Iberian Coastal | 1920 - 1929 | |
| Antithamnionella ternifolia | United Kingdom (Britain) / English Channel | To 1906 | |
| Antithamnionella ternifolia | United Kingdom (Britain) / North Sea | To 1999 | |
| Aoroides curvipes | France / Biscay Gulf | 2009 | |
| Aoroides longimerus | France / Biscay Gulf | 2013 | |
| Aoroides longimerus | France / Celtic seas | 2014 | |
| Aoroides longimerus | France / English Channel | 2014 | |
| Aoroides longimerus | France / Western Mediterranean | From 2015 | |
| Aoroides secundus | France / Biscay Gulf | To 2010 | |
| Aoroides semicurvatus | France / Biscay Gulf | 2009 | |
| Aoroides semicurvatus | France / English Channel | 2019 | |
| Aoroides semicurvatus | Netherlands | 2017 | |
| Apedinella radians | Bulgaria | 1987 | |
| Apedinella radians | Romania | 1991 | |
| Apedinella radians | Ukraine / Black Sea | From 1999 | |
| Aphanius dispar | Israel | 1944 | |
| Aphelochaeta marioni | Denmark / Baltic Sea | 1991 | |
| Aphelochaeta marioni | Denmark / North Sea | 1984 | |
| Aphelochaeta marioni | France / English Channel | 2001 | |
| Aphelochaeta marioni | Germany / North Sea | 1938 | |
| Aphelochaeta marioni | Netherlands | To 1951 | |
| Aphelochaeta marioni | United Kingdom (Britain) / North Sea / Orkney Islands | 1997 | |
| Aplidium accarense | Italy / Central Mediterranean | 2018 | |
