- Algeria
- Omodeo et al., 2003; Bazri et al., 2013
- Argentina
- Falco et al., 2015
- Austria
- Christian and Zicsi, 1999
- Azores
- Sciacchitano, 1969
- Belarus
- Maksimova and Mukhin, 2009
- Belgium
- Hlava and Kopecky, 2013; Muys, 2013
- Bolivia
- Rombke and Zicsi, 2007
- Brazil
- Rio Grande do Sul: Brown and James, 2007
- Bulgaria
- Zicsi and Csuzdi, 1986b; Stojanovic et al., 2012; Szederjesi, 2012; Valchovski, 2012
- Canary Islands
- Talavera, 1987, 2007
- Chile
- Zicsi and Csuzdi, 2007
- Colombia
- Feijoo, 2007b
- Croatia
- Hackenberger and Hackenberger B.K., 2013
- Czech Republic
- Pizl, 2001b; Schlaghamersky and Pizl, 2009; Zeithaml et al., 2009; Svarc and Kula, 2011
- Denmark
- Blakemore, 2007
- Ecuador
- Zicsi, 2007
- Estonia
- Ivask et al., 2012
- Faroe Islands
- Enckell and Rundgren, 1988
- Finland
- Blakemore, 2007
- France
- All data concern subspecies:
- O.l.gracile: Bouche, 1972
- O.l.lacteum: Bouche, 1972
- Hungary
- Csuzdi and Zicsi, 2003
- Iran
- Mirmonsef et al., 2011; Farhadi et al., 2013
- Italy
- Paoletti, 1988; Paoletti et al., 2013
- Latvia
- Ventins, 2011, 2011c
- Lithuania
- Atlavinyte, 1989; Kriauceliunaite, 2006
- Madeira
- Talavera, 1996
- Moldova
- Fedorovich, 1991
- Montenegro
- All data concern subspecies:
- O.l.giganteum: Stojanovic and Karaman, 2003b
- O.l.lacteum: Bouche, 1972
- Norway
- Blakemore, 2007
- Panama
- Brown and Fragoso, 2007
- Peru
- Rombke, 2007
- Poland
- Kasprzak, 1989
- Portugal
- Trigo et al., 1988, 1989
- Romania
- Brinzea, 2011; Pop, 2012
- Russia
- Perel, 1979; Perel-Vsevolodova, 1997; Blakemore, 2007c; Komi Rep.: Krylova et al., 2011; Mihaylovich et al., 2012; Tatarstan: Kibardina and Gordienko, 2010
- Serbia
- Milutinovic, 2010
- South Africa
- Nxele, 2012
- Spain
- Diaz Cosin et al., 1992; Monroy et al., 2003
- O.l.gracile: Perez Onteniente and Rodriguez Babio, 2009
- Sweden
- Blakemore, 2007
- Switzerland
- Le Bayon et al., 2013
- The Netherlands
- van Rhee, 1970
- Turkey
- Omodeo and Rota, 1989, 1991
- United States
- Ohio: Olson, 1933
- Uruguay
- Grosso and Brown, 2007
- Uzbekistan
- Rakhmatullaev et al., 2010
- Venezuela
- Brown and Fragoso, 2007b
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