• Permian of Greenland (1 collection)

• Carboniferous of Belarus (1), United States (2: Iowa, Oklahoma)

• Devonian of Australia (3), Belarus (3), Belgium (1), Bolivia (1), Iran (1), South Africa (3), Svalbard and Jan Mayen (1), the United Kingdom (2), United States (2: California, Nevada)

• Silurian of Canada (1: Nunavut), the United Kingdom (1)

Total: 23 collections each including a single occurrence