| antarctica | | aurospio sp. rg-2014 | species | 3 | 0 |
| antarctica | | cf. spionidae sp. dh-2009 | species | 12 | 0 |
| antarctica | | laonice sp. 1 rg-2016 | species | 2 | 0 |
| antarctica | | laonice sp. 2 rg-2016 | species | 1 | 0 |
| antarctica | | laonice sp. a rg-2014 | species | 3 | 0 |
| antarctica | | laonice sp. b rg-2014 | species | 2 | 0 |
| antarctica | | scolelepis eltaninae | species | 4 | 0 |
| antarctica | | spiophanes sp. rg-2014 | species | 3 | 0 |
| argentina | | boccardia proboscidea | species | 30 | 0 |
| argentina | | rhynchospio glutaea | species | 21 | 0 |
| australia | | boccardia proboscidea | species | 5 | 0 |
| australia | | polydora websteri | species | 20 | 0 |
| australia | | rhynchospio sp. 44(1) | species | 4 | 0 |
| australia | | rhynchospio sp. 44(2) | species | 4 | 0 |
| australia | western australia | polydora hoplura | species | 3 | 0 |
| brazil | | dispio remanei | species | 3 | 0 |
| brazil | | scolelepis acuta | species | 3 | 0 |
| brazil | | scolelepis chilensis | species | 3 | 0 |
| brazil | | scolelepis goodbodyi | species | 3 | 0 |
| canada | | rhynchospio glutaea | species | 19 | 0 |
| canada | british columbia | boccardia proboscidea | species | 3 | 0 |
| canada | british columbia | laonice cirrata cmc01 | species | 7 | 0 |
| canada | british columbia | laonice cirrata cmc02 | species | 1 | 0 |
| canada | british columbia | scolelepis squamata | species | 2 | 0 |
| canada | manitoba | prionospio steenstrupi | species | 23 | 0 |
| canada | manitoba | scolelepis sp. cmc03 | species | 9 | 0 |
| canada | manitoba | scolelepis sp. cmc04 | species | 1 | 0 |
| canada | manitoba | spio sp. cmc01 | species | 1 | 0 |
| canada | manitoba | spio sp. cmc02 | species | 12 | 0 |
| canada | manitoba | spio sp. cmc03 | species | 9 | 0 |
| canada | new brunswick | marenzelleria viridis | species | 10 | 0 |
| canada | new brunswick | prionospio steenstrupi | species | 2 | 0 |
| canada | new brunswick | scolelepis sp. cmc02 | species | 1 | 0 |
| canada | new brunswick | spio setosa | species | 4 | 0 |
| canada | newfoundland and labrador | laonice cirrata | species | 1 | 0 |
| canada | newfoundland and labrador | spionidae sp. cmc01 | species | 1 | 0 |
| canada | nunavut | scolelepis sp. cmc01 | species | 7 | 0 |
| canada | nunavut | spio sp. cmc01 | species | 11 | 0 |
| canada | nunavut | spio sp. cmc03 | species | 2 | 0 |
| canada | nunavut | spionidae sp. cmc04 | species | 1 | 0 |
| china | | boccardiella hamata | species | 14 | 0 |
| china | | polydora aura | species | 5 | 0 |
| china | | polydora brevipalpa | species | 35 | 0 |
| china | | polydora haswelli | species | 1 | 0 |
| china | | polydora lingshuiensis | species | 8 | 0 |
| china | | polydora onagawaensis | species | 1 | 0 |
| china | | polydora websteri | species | 3 | 0 |
| china | | pseudopolydora paucibranchiata | species | 6 | 0 |
| china | | scolelepis daphoinos | species | 5 | 0 |
| china | guangdong | polydora haswelli | species | 3 | 0 |
| china | guangdong | polydora lingshuiensis | species | 5 | 0 |
| china | guangxi | polydora brevipalpa | species | 3 | 0 |
| china | guangxi | polydora lingshuiensis | species | 6 | 0 |
| china | hainan | polydora haswelli | species | 3 | 0 |
| china | hainan | polydora lingshuiensis | species | 108 | 0 |
| china | jiangsu | polydora websteri | species | 12 | 0 |
| china | liaoning | polydora brevipalpa | species | 1 | 0 |
| china | zhejiang | polydora brevipalpa | species | 2 | 0 |
| denmark | | pygospio elegans | species | 7 | 0 |
| finland | | pygospio elegans | species | 6 | 0 |
| france | | aonides oxycephala | species | 13 | 0 |
| france | | boccardia proboscidea | species | 5 | 0 |
| france | | pygospio elegans | species | 10 | 0 |
| france | bretagne region | aonides oxycephala | species | 1 | 0 |
| french polynesia | | spionidae sp. bmoo-13880 | species | 1 | 0 |
| germany | | pygospio elegans | species | 8 | 0 |
| germany | schleswig-holstein | malacoceros fuliginosus | species | 2 | 0 |
| iceland | | laonice cirrata | species | 4 | 0 |
| india | | aurospio sp. tp0005 | species | 1 | 0 |
| india | | laonice cirrata | species | 3 | 0 |
| india | | prionospio cirrifera | species | 1 | 0 |
| israel | | prionospio sp. mr-2013 | species | 3 | 0 |
| italy | | spiophanes bombyx | species | 2 | 0 |
| japan | hiroshima prefecture | polydora aura | species | 2 | 0 |
| japan | hiroshima prefecture | polydora haswelli | species | 1 | 0 |
| japan | hiroshima prefecture | polydora hoplura | species | 4 | 0 |
| japan | kochi prefecture | pseudopolydora ushioni | species | 9 | 0 |
| japan | miyagi ken prefecture | pseudopolydora achaeta | species | 3 | 0 |
| japan | nagasaki prefecture | polydora hoplura | species | 3 | 0 |
| japan | tokyo prefecture | paraprionospio sp. tb-2016 | species | 7 | 0 |
| japan | tokyo prefecture | polydora haswelli | species | 2 | 0 |
| japan | tokyo prefecture | pseudopolydora tsubaki | species | 7 | 0 |
| netherlands | | pygospio elegans | species | 6 | 0 |
| norway | | marenzelleria viridis | species | 8 | 0 |
| norway | | spiophanes bombyx | species | 1 | 0 |
| norway | | spiophanes kroyeri | species | 2 | 0 |
| norway | finnmark county | laonice cirrata | species | 2 | 0 |
| norway | svalbard | marenzelleria wireni | species | 2 | 0 |
| papua new guinea | new ireland province | scolelepis eltaninae | species | 1 | 0 |
| portugal | viana do castelo district | scolelepis foliosa | species | 6 | 0 |
| portugal | viana do castelo district | scolelepis sp. bold:acp4757 | species | 1 | 0 |
| portugal | viana do castelo district | spionidae sp. bold:aco6063 | species | 1 | 0 |
| russia | | dipolydora quadrilobata | species | 15 | 0 |
| russia | | laonice cirrata | species | 14 | 0 |
| russia | | marenzelleria arctia | species | 37 | 0 |
| russia | | pygospio elegans | species | 27 | 0 |
| russia | | pygospio sp. 2578 | species | 4 | 0 |
| russia | | pygospio sp. 2579 | species | 2 | 0 |
| russia | | pygospio sp. 2580 | species | 4 | 0 |
| russia | | pygospio sp. 2581 | species | 4 | 0 |
| russia | | pygospio sp. 2582 | species | 4 | 0 |
| russia | | pygospio sp. 2583 | species | 4 | 0 |
| russia | | pygospio sp. 2584 | species | 4 | 0 |
| russia | | pygospio sp. 2743 | species | 1 | 0 |
| russia | | pygospio sp. 2744 | species | 1 | 0 |
| russia | | pygospio sp. 2745 | species | 1 | 0 |
| russia | | pygospio sp. 2746 | species | 1 | 0 |
| russia | | pygospio sp. 2747 | species | 1 | 0 |
| russia | | spio sp. 2573 | species | 4 | 0 |
| russia | | spio sp. 2574 | species | 4 | 0 |
| russia | | spio sp. 2575 | species | 4 | 0 |
| russia | | spio sp. 2576 | species | 4 | 0 |
| russia | | spiophanes uschakowi | species | 28 | 0 |
| south africa | | boccardia polybranchia | species | 23 | 0 |
| south africa | | boccardia proboscidea | species | 20 | 0 |
| south africa | | boccardia pseudonatrix | species | 19 | 0 |
| south africa | | dipolydora capensis | species | 21 | 0 |
| south africa | | dipolydora cf. socialis lgw-2017 | species | 9 | 0 |
| south africa | | polydora cf. nuchalis lgw-2017 | species | 12 | 0 |
| south africa | | polydora cf. websteri lgw-2017 | species | 14 | 0 |
| south africa | | polydora hoplura | species | 31 | 0 |
| south africa | | pseudopolydora dayii | species | 10 | 0 |
| south africa | the western cape province | polydora websteri | species | 77 | 0 |
| south korea | | rhynchospio aff. asiatica vvp-2014 | species | 15 | 0 |
| spain | | dipolydora capensis | species | 1 | 0 |
| spain | | laonice cirrata | species | 1 | 0 |
| spain | asturias | scolelepis squamata | species | 21 | 0 |
| spain | basque country | spiophanes bombyx | species | 1 | 0 |
| spain | basque country | spiophanes kroyeri | species | 1 | 0 |
| spain | galicia | polydora hoplura | species | 1 | 0 |
| spain | galicia | scolelepis squamata | species | 8 | 0 |
| sweden | | pygospio elegans | species | 1 | 0 |
| united kingdom | | boccardia proboscidea | species | 21 | 0 |
| united kingdom | | pygospio elegans | species | 21 | 0 |
| united kingdom | | spiophanes bombyx | species | 1 | 0 |
| united kingdom | england | spiophanes bombyx | species | 2 | 0 |
| united states | | boccardia proboscidea | species | 36 | 0 |
| united states | | polydora cornuta | species | 1 | 0 |
| united states | | pygospio elegans | species | 30 | 0 |
| united states | | pygospio sp. vvp-2014 | species | 19 | 0 |
| united states | | rhynchospio foliosa | species | 8 | 0 |
| united states | | rhynchospio glutaea | species | 23 | 0 |
| united states | | spiophanes berkeleyorum | species | 4 | 0 |
| united states | alabama | polydora websteri | species | 157 | 0 |
| united states | alaska | scolelepis squamata | species | 4 | 0 |
| united states | alaska | spiophanes norrisi | species | 1 | 0 |
| united states | california | scolelepis acuta | species | 13 | 0 |
| united states | florida | prionospio steenstrupi | species | 1 | 0 |
| united states | hawaii | polydora websteri | species | 1 | 0 |
| united states | maine | polydora cornuta | species | 11 | 0 |
| united states | maine | polydora onagawaensis | species | 27 | 0 |
| united states | maine | polydora websteri | species | 22 | 0 |
| united states | maryland | marenzelleria neglecta | species | 7 | 0 |
| united states | maryland | polydora websteri | species | 3 | 0 |
| united states | massachusetts | polydora cornuta | species | 8 | 0 |
| united states | massachusetts | polydora websteri | species | 2 | 0 |
| united states | new hampshire | polydora cornuta | species | 2 | 0 |
| united states | new hampshire | polydora websteri | species | 4 | 0 |
| united states | new jersey | streblospio benedicti | species | 11 | 0 |
| united states | new york | marenzelleria viridis | species | 3 | 0 |
| united states | rhode island | polydora onagawaensis | species | 21 | 0 |
| united states | south carolina | streblospio benedicti | species | 1 | 0 |
| united states | virginia | polydora cornuta | species | 6 | 0 |
| united states | washington | boccardiella hamata | species | 2 | 0 |
| united states | washington | polydora websteri | species | 20 | 0 |
| vietnam | | rhynchospio nhatrangi | species | 11 | 0 |