| belgium | | gomphonema sp. 117 | species | 1 | 0 |
| belgium | | gomphonema sp. 12 | species | 1 | 0 |
| brazil | | gomphonema parvulum | species | 11 | 0 |
| canada | quebec | gomphonema cf. parvulum | species | 1 | 0 |
| croatia | | gomphonema truncatum | species | 2 | 0 |
| denmark | | gomphonema acuminatum | species | 2 | 0 |
| denmark | | gomphonema capitatum | species | 2 | 0 |
| faroe islands | sandoyar region | gomphonema parvulum | species | 1 | 0 |
| faroe islands | vaga region | gomphonema parvulum | species | 3 | 0 |
| finland | | gomphonema acuminatum | species | 1 | 0 |
| france | | gomphonema lagenula | species | 8 | 0 |
| france | | gomphonema parvulum | species | 30 | 0 |
| france | | gomphonema saprophilum | species | 2 | 0 |
| germany | | gomphonema acuminatum | species | 14 | 0 |
| germany | | gomphonema affine | species | 2 | 0 |
| germany | | gomphonema capitatum | species | 12 | 0 |
| germany | | gomphonema cf. angustatum | species | 1 | 0 |
| germany | | gomphonema cf. parvulum | species | 1 | 0 |
| germany | | gomphonema micropus | species | 2 | 0 |
| germany | | gomphonema productum | species | 1 | 0 |
| germany | | gomphonema subclavatum | species | 4 | 0 |
| germany | | gomphonema truncatum | species | 6 | 0 |
| germany | bavaria | gomphonema micropus | species | 1 | 0 |
| germany | bavaria | gomphonema sp. tf-2014 | species | 1 | 0 |
| germany | berlin | gomphonema saprophilum | species | 5 | 0 |
| germany | lower saxony | gomphonema acuminatum | species | 1 | 0 |
| germany | lower saxony | gomphonema affine | species | 2 | 0 |
| germany | lower saxony | gomphonema cf. angustatum | species | 1 | 0 |
| germany | lower saxony | gomphonema cf. parvulum | species | 1 | 0 |
| germany | lower saxony | gomphonema micropus | species | 2 | 0 |
| germany | lower saxony | gomphonema productum | species | 1 | 0 |
| guam | | gomphonema sp. tn-2014 | species | 10 | 0 |
| hungary | | gomphonema parvulum | species | 1 | 0 |
| iceland | | gomphonema acuminatum | species | 2 | 0 |
| iraq | | gomphonema pumilum | species | 1 | 0 |
| italy | | gomphonema acuminatum | species | 1 | 0 |
| italy | | gomphonema parvulum | species | 4 | 0 |
| italy | | gomphonema saprophilum | species | 1 | 0 |
| japan | tokyo prefecture | gomphonema pseudaugur | species | 1 | 0 |
| luxembourg | | gomphonema parvulum | species | 10 | 0 |
| luxembourg | | gomphonema saprophilum | species | 1 | 0 |
| mayotte | | gomphonema bourbonense | species | 5 | 0 |
| mayotte | | gomphonema clevei | species | 3 | 0 |
| mayotte | | gomphonema parvulum | species | 99 | 0 |
| mexico | | gomphonema acuminatum | species | 2 | 0 |
| mexico | | gomphonema capitatum | species | 1 | 0 |
| mexico | | gomphonema lagenula | species | 2 | 0 |
| portugal | | gomphonema acuminatum | species | 2 | 0 |
| portugal | | gomphonema narodoense | species | 2 | 0 |
| portugal | | gomphonema parvulum | species | 14 | 0 |
| portugal | | gomphonema rosenstockianum | species | 1 | 0 |
| reunion | | gomphonema affine | species | 1 | 0 |
| reunion | | gomphonema clavatum | species | 2 | 0 |
| reunion | | gomphonema pumilum | species | 2 | 0 |
| russia | volgograd oblast | uncultured gomphonema | species | 1 | 0 |
| south korea | | gomphonema acuminatum | species | 3 | 0 |
| south korea | | gomphonema capitatum | species | 1 | 0 |
| south korea | | gomphonema parvulum | species | 1 | 0 |
| south korea | | gomphonema subclavatum | species | 12 | 0 |
| south korea | | gomphonema truncatum | species | 9 | 0 |
| spain | | gomphonema capitatum | species | 4 | 0 |
| spain | | gomphonema micropus | species | 2 | 0 |
| sweden | | gomphonema saprophilum | species | 1 | 0 |
| switzerland | | gomphonema truncatum | species | 2 | 0 |
| united states | georgia | gomphonema subclavatum var. mexicanum | varietas | 5 | 0 |
| united states | iowa | gomphonema affine | species | 10 | 0 |
| united states | iowa | gomphonema gracile | species | 5 | 0 |
| united states | iowa | gomphonema intricatum | species | 5 | 0 |
| united states | iowa | gomphonema intricatum var. vibrio | varietas | 5 | 0 |
| united states | iowa | gomphonema subclavatum var. commutatum | varietas | 5 | 0 |
| united states | minnesota | gomphonema brebissonii | species | 5 | 0 |
| united states | minnesota | gomphonema dichotomum | species | 5 | 0 |
| united states | texas | gomphonema acuminatum | species | 4 | 0 |
| united states | texas | gomphonema sp. tn-2014 | species | 5 | 0 |