- Bulgaria
- Zicsi and Csuzdi, 1986b
- Canada
- Reynolds, 1995; Quebec: Reynolds, 1975d, 1975e, 1976c; Lesage and Swert, 1978; Reynolds and Reynolds, 1992
- Chile
- Juan Fernández Islands: Gates, 1969c
- Falkland Islands
- Reynolds and Jones, 2006
- France
- Bouche, 1972
- Iceland
- Reynolds, 1977; Blakemore, 2007b
- Taiwan
- Blakemore et al., 2006
- United Kingdom
- Sims and Gerard, 1999
- United States
- Reynolds, 1995; Alaska: Bowser et al., 2013; Idaho: James, 2000; Montana: James, 2000; Oregon: James, 2000
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Data are not exhaustive. The database is permanently a work in progress.