| anguilla | | corynosoma strumosum | species | 0 | 1 |
| anguilla | | southwellina hispida | species | 0 | 1 |
| argentina | | corynosoma australe | species | 2 | 0 |
| argentina | chubut province | corynosoma australe | species | 9 | 0 |
| argentina | chubut province | profilicollis chasmagnathi | species | 5 | 0 |
| australia | queensland | corynosoma cetaceum | species | 0 | 1 |
| brazil | rio de janeiro | corynosoma australe | species | 4 | 1 |
| canada | british columbia | profilicollis botulus | species | 0 | 1 |
| canada | new brunswick | profilicollis botulus | species | 0 | 1 |
| canada | newfoundland and labrador | polymorphus botulus | species | 0 | 1 |
| canada | ontario | polymorphus boschadis | species | 0 | 1 |
| chile | biobio region | profilicollis altmani | species | 8 | 0 |
| chile | coquimbo region | profilicollis altmani | species | 7 | 0 |
| chile | los rios region | profilicollis altmani | species | 50 | 0 |
| chile | los rios region | profilicollis antarcticus | species | 4 | 0 |
| germany | lower saxony | corynosoma strumosum | species | 0 | 1 |
| germany | saxony | corynosoma strumosum | species | 0 | 1 |
| iran | | corynosoma caspicum | species | 1 | 0 |
| italy | sardinia autonomous region | southwellina hispida | species | 0 | 1 |
| japan | hokkaido prefecture | corynosoma sp. akgh | species | 2 | 0 |
| japan | hokkaido prefecture | corynosoma sp. otaru2013 | species | 1 | 0 |
| mexico | baja california sur | corynosoma australe | species | 54 | 0 |
| mexico | chihuahua | polymorphus minutus | species | 0 | 1 |
| mexico | jalisco | arhythmorhynchus brevis | species | 0 | 1 |
| mexico | nayarit | hexaglandula corynosoma | species | 1 | 0 |
| mexico | sonora | corynosoma australe | species | 6 | 0 |
| mexico | tabasco | hexaglandula corynosoma | species | 1 | 0 |
| mexico | yucatan | hexaglandula corynosoma | species | 2 | 1 |
| new zealand | otago | corynosoma hannae | species | 123 | 0 |
| new zealand | southland | corynosoma hannae | species | 4 | 0 |
| peru | | corynosoma australe | species | 16 | 0 |
| tanzania | morogoro region | polymorphus boschadis | species | 0 | 1 |
| united kingdom | england | polymorphus minutus | species | 0 | 1 |
| united kingdom | scotland | polymorphus minutus | species | 0 | 1 |
| united states | alaska | corynosoma semerme | species | 0 | 3 |
| united states | alaska | corynosoma semerme | species | 1 | 0 |
| united states | alaska | corynosoma strumosum | species | 0 | 2 |
| united states | alaska | corynosoma validum | species | 1 | 1 |
| united states | alaska | corynosoma villosum | species | 1 | 1 |
| united states | california | corynosoma australe | species | 6 | 0 |
| united states | california | corynosoma enhydri | species | 0 | 1 |
| united states | california | corynosoma strumosum | species | 1 | 0 |
| united states | california | profilicollis altmani | species | 0 | 3 |
| united states | california | southwellina hispida | species | 4 | 0 |
| united states | florida | arhythmorhynchus brevis | species | 0 | 1 |
| united states | florida | arhythmorhynchus frassoni | species | 0 | 1 |
| united states | florida | hexaglandula corynosoma | species | 0 | 1 |
| united states | florida | polymorphus minutus | species | 0 | 1 |
| united states | florida | profilicollis altmani | species | 0 | 1 |
| united states | louisiana | arhythmorhynchus frassoni | species | 0 | 1 |
| united states | louisiana | hexaglandula corynosoma | species | 0 | 1 |
| united states | louisiana | profilicollis altmani | species | 0 | 1 |
| united states | mississippi | arhythmorhynchus frassoni | species | 0 | 1 |
| united states | mississippi | hexaglandula corynosoma | species | 0 | 1 |
| united states | mississippi | profilicollis altmani | species | 0 | 1 |
| united states | north carolina | arhythmorhynchus frassoni | species | 0 | 1 |
| united states | north carolina | hexaglandula corynosoma | species | 0 | 1 |
| united states | north carolina | profilicollis altmani | species | 0 | 1 |
| united states | oregon | corynosoma strumosum | species | 0 | 1 |
| united states | south carolina | corynosoma strumosum | species | 0 | 1 |
| united states | texas | polymorphus minutus | species | 1 | 1 |
| united states | washington | corynosoma strumosum | species | 0 | 1 |
| uruguay | canelones department | profilicollis chasmagnathi | species | 5 | 0 |
| uruguay | maldonado department | profilicollis chasmagnathi | species | 14 | 0 |
| uruguay | rocha department | profilicollis altmani | species | 4 | 0 |