| argentina | | ahnfeltiopsis devoniensis | species | 3 | 0 |
| australia | | ahnfeltiopsis fastigiata | species | 3 | 0 |
| australia | | ahnfeltiopsis sp. | species | 3 | 0 |
| australia | victoria | ahnfeltiopsis humilis | species | 2 | 0 |
| canada | british columbia | ahnfeltiopsis gigartinoides | species | 7 | 0 |
| canada | british columbia | ahnfeltiopsis leptophylla | species | 3 | 0 |
| canada | british columbia | ahnfeltiopsis linearis | species | 6 | 0 |
| china | | ahnfeltiopsis flabelliformis | species | 12 | 0 |
| china | shandong | ahnfeltiopsis flabelliformis | species | 1 | 0 |
| france | basse-normandie region | ahnfeltiopsis devoniensis | species | 2 | 0 |
| france | bretagne region | ahnfeltiopsis devoniensis | species | 35 | 0 |
| india | | ahnfeltiopsis pygmaea | species | 3 | 0 |
| japan | | ahnfeltiopsis flabelliformis | species | 3 | 0 |
| japan | | ahnfeltiopsis paradoxa | species | 3 | 0 |
| japan | chiba prefecture | ahnfeltiopsis flabelliformis | species | 3 | 0 |
| japan | chiba prefecture | ahnfeltiopsis paradoxa | species | 3 | 0 |
| japan | hokkaido prefecture | ahnfeltiopsis sp. fredericqs_6.ix.93 | species | 3 | 0 |
| japan | kumamoto prefecture | ahnfeltiopsis flabelliformis | species | 1 | 0 |
| japan | mie prefecture | ahnfeltiopsis flabelliformis | species | 1 | 0 |
| mexico | guerrero | ahnfeltiopsis concinna | species | 1 | 0 |
| namibia | | ahnfeltiopsis complicata | species | 3 | 0 |
| namibia | | ahnfeltiopsis vermicularis | species | 2 | 0 |
| namibia | erongo region | ahnfeltiopsis complicata | species | 3 | 0 |
| namibia | erongo region | ahnfeltiopsis vermicularis | species | 2 | 0 |
| new zealand | | ahnfeltiopsis humilis | species | 3 | 0 |
| russia | | ahnfeltiopsis divaricatus | species | 3 | 0 |
| russia | sakhalin oblast | ahnfeltiopsis divaricatus | species | 1 | 0 |
| south africa | northern cape province | ahnfeltiopsis complicata | species | 6 | 0 |
| south africa | northern cape province | ahnfeltiopsis vermicularis | species | 14 | 0 |
| south africa | the western cape province | ahnfeltiopsis complicata | species | 5 | 0 |
| south africa | the western cape province | ahnfeltiopsis glomerata | species | 3 | 0 |
| south africa | the western cape province | ahnfeltiopsis intermedia | species | 2 | 0 |
| south africa | the western cape province | ahnfeltiopsis polyclada | species | 3 | 0 |
| south africa | the western cape province | ahnfeltiopsis vermicularis | species | 73 | 0 |
| south korea | | ahnfeltiopsis flabelliformis | species | 1 | 0 |
| south korea | jeju province | ahnfeltiopsis flabelliformis | species | 11 | 0 |
| spain | | ahnfeltiopsis devoniensis | species | 12 | 0 |
| spain | | ahnfeltiopsis pusilla | species | 6 | 0 |
| taiwan | | ahnfeltiopsis flabelliformis | species | 3 | 0 |
| united states | | ahnfeltiopsis concinna | species | 1 | 0 |
| united states | | ahnfeltiopsis leptophylla | species | 3 | 0 |
| united states | | ahnfeltiopsis linearis | species | 6 | 0 |
| united states | california | ahnfeltiopsis gigartinoides | species | 2 | 0 |
| united states | california | ahnfeltiopsis leptophylla | species | 11 | 0 |
| united states | california | ahnfeltiopsis linearis | species | 7 | 0 |
| united states | california | ahnfeltiopsis sp. gws-2014 | species | 4 | 0 |
| united states | hawaii | ahnfeltiopsis divaricatus | species | 1 | 0 |
| united states | oregon | ahnfeltiopsis gigartinoides | species | 11 | 0 |
| vietnam | | ahnfeltiopsis chnoosporoides | species | 9 | 0 |