| canada | manitoba | sphacelaria arctica | species | 2 | 0 |
| canada | manitoba | sphacelaria plumosa | species | 15 | 0 |
| canada | manitoba | sphacelaria racemosa | species | 1 | 0 |
| canada | manitoba | sphacelaria radicans | species | 1 | 0 |
| canada | new brunswick | sphacelaria plumosa | species | 1 | 0 |
| canada | newfoundland and labrador | sphacelaria arctica | species | 1 | 0 |
| canada | newfoundland and labrador | sphacelaria plumosa | species | 7 | 0 |
| canada | newfoundland and labrador | sphacelaria racemosa | species | 1 | 0 |
| canada | nova scotia | sphacelaria plumosa | species | 3 | 0 |
| canada | nunavut | sphacelaria plumosa | species | 7 | 0 |
| canada | prince edward island | sphacelaria plumosa | species | 3 | 0 |
| cape verde | | sphacelaria rigidula | species | 2 | 0 |
| china | | sphacelaria subfusca | species | 1 | 0 |
| curacao | | sphacelaria tribuloides | species | 2 | 0 |
| france | | sphacelaria cirrosa | species | 2 | 0 |
| france | basse-normandie region | sphacelaria caespitula | species | 3361 | 0 |
| ireland | connaught province | sphacelaria fusca | species | 41 | 0 |
| ireland | connaught province | sphacelaria rigidula | species | 2 | 0 |
| japan | | sphacelaria plumigera | species | 2 | 0 |
| japan | hokkaido prefecture | sphacelaria rigidula | species | 4 | 0 |
| japan | okinawa prefecture | sphacelaria tribuloides | species | 2 | 0 |
| kuwait | | sphacelaria rigidula | species | 1 | 0 |
| malta | | sphacelaria sp. | species | 1 | 0 |
| new zealand | | sphacelaria pulvinata | species | 2 | 0 |
| new zealand | west coast | sphacelaria bracteata | species | 1 | 0 |
| new zealand | west coast | sphacelaria spuria | species | 50 | 0 |
| norway | | sphacelaria caespitula | species | 6 | 0 |
| norway | | sphacelaria nana | species | 6 | 0 |
| norway | | sphacelaria plumosa | species | 3 | 0 |
| norway | | sphacelaria radicans | species | 2 | 0 |
| norway | akershus county | sphacelaria radicans | species | 25 | 0 |
| norway | vestfold county | sphacelaria nana | species | 3 | 0 |
| south korea | jeju province | sphacelaria divaricata | species | 3 | 0 |
| united kingdom | scotland | sphacelaria caespitula | species | 2 | 0 |
| united kingdom | scotland | sphacelaria cirrosa | species | 3 | 0 |
| united kingdom | scotland | sphacelaria mirabilis | species | 2 | 0 |
| united kingdom | scotland | sphacelaria plumigera | species | 3 | 0 |
| united kingdom | scotland | sphacelaria racemosa | species | 11 | 0 |
| united states | alaska | sphacelaria arctica | species | 2 | 0 |
| united states | alaska | sphacelaria plumosa | species | 5 | 0 |
| united states | california | sphacelaria rigidula | species | 31 | 0 |