- Algeria
- Omodeo et al., 2003
- Austria
- Sims and Gerard, 1985
- Channel Islands
- Channel Islands: Tetry, 1936; Sims and Gerard, 1985
- France
- Bouche, 1972; Lamparski et al., 1987; Stojanovic et al., 2014
- Germany
- Lehmitz et al., 2014; Stojanovic et al., 2014
- Ireland
- Tetry, 1936; Lamparski et al., 1987; Stojanovic et al., 2014
- Italy
- Stojanovic et al., 2014
- Morocco
- Omodeo et al., 2003; Omodeo and Rota, 2008
- Portugal
- Trigo et al., 1988; Stojanovic et al., 2014
- Serbia
- Stojanovic et al., 2014
- Spain
- Lamparski et al., 1987; Diaz Cosin et al., 1992; Monroy et al., 2003; Perez Onteniente and Rodriguez Babio, 2009; Stojanovic et al., 2014
- Switzerland
- Suter and Cuendet, 1994; Stojanovic et al., 2014
- United Kingdom
- Sims and Gerard, 1985, 1999; Stojanovic et al., 2014; Scotland: Carpenter, 2011
- United States
- Maryland: Csuzdi and Szlavecz, 2003; Reynolds and Wetzel, 2004, 2008; Washington DC: Csuzdi and Szlavecz, 2003
- Uruguay
- Grosso and Brown, 2007
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Data are not exhaustive. The database is permanently a work in progress.