- Algeria
- Omodeo et al., 2003
- Belarus
- Maksimova and Mukhin, 2009
- Belgium
- Hlava and Kopecky, 2013; Muys, 2013
- Bulgaria
- Zicsi and Csuzdi, 1986b; Stojanovic et al., 2012; Szederjesi, 2012; Valchovski, 2012
- Czech Republic
- Zeithaml et al., 2009; Svarc and Kula, 2011
- Denmark
- Blakemore, 2007
- Estonia
- Ivask et al., 2012
- Faroe Islands
- Enckell and Rundgren, 1988
- Finland
- Blakemore, 2007
- France
- O.l.gracile: Bouche, 1972; O.l.lacteum: Bouche, 1972
- Iran
- Mirmonsef et al., 2011; Farhadi et al., 2013
- Italy
- Paoletti, 1988
- Latvia
- Ventins, 2011, 2011c
- Madeira
- Talavera, 1996
- Norway
- Blakemore, 2007
- Panama
- Brown and Fragoso, 2007
- Poland
- Kasprzak, 1989
- Portugal
- Trigo et al., 1988, 1989
- Romania
- Brinzea, 2011; Pop, 2012
- Russia
- Perel, 1979; Perel-Vsevolodova, 1997; Blakemore, 2007c
- Serbia
- Milutinovic, 2010
- Spain
- Diaz Cosin et al., 1992; Monroy et al., 2003; O.l.gracile: Perez Onteniente and Rodriguez Babio, 2009
- Sweden
- Blakemore, 2007
- Turkey
- Omodeo and Rota, 1989, 1991
- United States
- Ohio: Olson, 1933
- Uruguay
- Grosso and Brown, 2007
- Uzbekistan
- Rakhmatullaev et al., 2010
|
Data are not exhaustive. The database is permanently a work in progress.