| switzerland | | plagiostoma petiolophilum | species | 2 | 0 |
| united states | | plagiostoma petiolophilum | species | 1 | 0 |
| united states | maryland | plagiostoma petiolophilum | species | 1 | 0 |
| united states | new york | plagiostoma petiolophilum | species | 11 | 0 |
| united states | tennessee | plagiostoma petiolophilum | species | 2 | 0 |