The 25 species on the 2012-2014 list are distributed between 16 countries.

This species is distributed throughout the central and western Pacific.

This species is probably much more widely distributed in northern China.

The species is widely distributed in western and northern Europe.

The approximately 350 species in the two families are distributed worldwide.

The species can be found at a high elevation and is widely distributed.

In Europe there are 335 species, distributed among 53 genera.

This species is distributed in the seas along the Philippines.

The group contains some 60 species distributed through the American tropics.

Overall, several species were distributed more or less based on the pH level.