| angola | | echinolittorina pulchella | species | 1 | 0 |
| angola | namibe province | echinolittorina pulchella | species | 1 | 0 |
| argentina | tierra del fuego province | laevilitorina caliginosa | species | 4 | 0 |
| australia | | echinolittorina australis | species | 3 | 0 |
| australia | | echinolittorina melanacme | species | 3 | 0 |
| australia | | echinolittorina trochoides b | species | 5 | 0 |
| australia | new south wales | afrolittorina acutispira | species | 5 | 0 |
| australia | new south wales | austrolittorina unifasciata | species | 4 | 0 |
| australia | new south wales | bembicium auratum | species | 7 | 0 |
| australia | new south wales | bembicium nanum | species | 4 | 0 |
| australia | new south wales | echinolittorina vidua | species | 1 | 0 |
| australia | new south wales | littoraria luteola | species | 17 | 0 |
| australia | new south wales | nodilittorina pyramidalis | species | 4 | 0 |
| australia | northern territory | echinolittorina trochoides b | species | 3 | 0 |
| australia | northern territory | littoraria ianthostoma | species | 3 | 0 |
| australia | queensland | bembicium auratum | species | 2 | 0 |
| australia | queensland | echinolittorina trochoides b | species | 7 | 0 |
| australia | queensland | echinolittorina vidua | species | 8 | 0 |
| australia | queensland | echinolittorina vidua a | species | 1 | 0 |
| australia | queensland | littoraria articulata | species | 4 | 0 |
| australia | queensland | littoraria filosa | species | 6 | 0 |
| australia | queensland | littoraria intermedia | species | 3 | 0 |
| australia | queensland | littoraria philippiana | species | 7 | 0 |
| australia | queensland | littoraria scabra | species | 3 | 0 |
| australia | queensland | littoraria undulata | species | 15 | 0 |
| australia | south australia | bembicium auratum | species | 2 | 0 |
| australia | south australia | bembicium nanum | species | 8 | 0 |
| australia | south australia | bembicium vittatum | species | 1 | 0 |
| australia | tasmania | afrolittorina praetermissa | species | 5 | 0 |
| australia | tasmania | bembicium nanum | species | 11 | 0 |
| australia | victoria | bembicium auratum | species | 17 | 0 |
| australia | victoria | bembicium nanum | species | 15 | 0 |
| australia | western australia | austrolittorina unifasciata | species | 1 | 0 |
| australia | western australia | bembicium auratum | species | 6 | 0 |
| australia | western australia | bembicium vittatum | species | 5 | 0 |
| australia | western australia | echinolittorina australis | species | 13 | 0 |
| australia | western australia | echinolittorina trochoides b | species | 3 | 0 |
| australia | western australia | echinolittorina vidua | species | 13 | 0 |
| australia | western australia | littoraria articulata | species | 3 | 0 |
| australia | western australia | littoraria cingulata cingulata | subspecies | 10 | 0 |
| australia | western australia | littoraria cingulata pristissini | subspecies | 6 | 0 |
| australia | western australia | littoraria filosa | species | 3 | 0 |
| australia | western australia | littoraria sulculosa | species | 10 | 0 |
| bahamas | | echinolittorina angustior | species | 2 | 0 |
| bahamas | | echinolittorina meleagris a | species | 2 | 0 |
| bahamas | | echinolittorina mespillum | species | 2 | 0 |
| bahamas | | echinolittorina riisei | species | 2 | 0 |
| bahamas | exuma district | cenchritis muricatus | species | 1 | 0 |
| barbados | | echinolittorina jamaicensis | species | 1 | 0 |
| barbados | | echinolittorina tuberculata | species | 2 | 0 |
| belgium | | littorina littorea | species | 5 | 0 |
| bermuda | | echinolittorina tuberculata | species | 1 | 0 |
| bermuda | | echinolittorina ziczac a | species | 3 | 0 |
| brazil | | echinolittorina lineolata | species | 5 | 0 |
| brazil | alagoas | littoraria flava | species | 14 | 0 |
| brazil | ceara | littoraria flava | species | 20 | 0 |
| brazil | espirito santo | littoraria flava | species | 20 | 0 |
| brazil | minas gerais | echinolittorina vermeiji | species | 4 | 0 |
| brazil | rio de janeiro | littoraria flava | species | 33 | 0 |
| brazil | santa catarina | littoraria flava | species | 37 | 0 |
| brazil | sao paulo | echinolittorina lineolata | species | 936 | 0 |
| brazil | sao paulo | littoraria angulifera | species | 3 | 0 |
| brazil | sao paulo | littoraria flava | species | 341 | 0 |
| cambodia | preah sihanouk province | echinolittorina trochoides a | species | 1 | 0 |
| cambodia | preah sihanouk province | echinolittorina vidua | species | 1 | 0 |
| cameroon | | echinolittorina granosa | species | 3 | 0 |
| canada | | littorina littorea | species | 18 | 0 |
| canada | british columbia | littorina plena | species | 3 | 0 |
| canada | british columbia | littorina scutulata | species | 30 | 0 |
| canada | british columbia | littorina sitkana | species | 42 | 0 |
| canada | manitoba | littorina saxatilis | species | 23 | 0 |
| canada | new brunswick | littorina littorea | species | 108 | 0 |
| canada | new brunswick | littorina obtusata | species | 8 | 0 |
| canada | new brunswick | littorina saxatilis | species | 6 | 0 |
| canada | newfoundland and labrador | littorina littorea | species | 105 | 0 |
| canada | newfoundland and labrador | littorina obtusata | species | 1 | 0 |
| canada | newfoundland and labrador | littorina saxatilis | species | 2 | 0 |
| canada | nova scotia | littorina littorea | species | 48 | 0 |
| canada | nova scotia | littorina obtusata | species | 23 | 0 |
| canada | nova scotia | littorina saxatilis | species | 13 | 0 |
| canada | prince edward island | littorina littorea | species | 2 | 0 |
| canada | prince edward island | littorina saxatilis | species | 14 | 0 |
| canada | quebec | littorina littorea | species | 3 | 0 |
| cape verde | | echinolittorina punctata b | species | 6 | 0 |
| cape verde | | tectarius striatus | species | 4 | 0 |
| cape verde | sal municipality | echinolittorina punctata b | species | 3 | 0 |
| cape verde | sao vicente municipality | echinolittorina punctata b | species | 3 | 0 |
| chile | araucania region | austrolittorina araucana | species | 106 | 0 |
| chile | santiago metropolitan region | echinolittorina peruviana | species | 2 | 0 |
| chile | valparaiso region | austrolittorina fernandezensis | species | 782 | 0 |
| chile | valparaiso region | echinolittorina pascua | species | 3 | 0 |
| china | | echinolittorina radiata | species | 3 | 0 |
| china | | littoraria intermedia | species | 4 | 0 |
| china | | littoraria melanostoma | species | 2 | 0 |
| china | | littoraria scabra | species | 1 | 0 |
| china | | littorina brevicula | species | 9 | 0 |
| china | | nodilittorina sp. ys-2011 | species | 1 | 0 |
| china | | nodilittorina trochoides | species | 1 | 0 |
| china | | peasiella habei | species | 1 | 0 |
| china | fujian | littoraria articulata | species | 3 | 0 |
| china | fujian | littoraria sinensis | species | 21 | 0 |
| china | guangdong | littoraria sinensis | species | 102 | 0 |
| china | guangdong | littorina brevicula | species | 58 | 0 |
| china | hunan | littoraria sinensis | species | 30 | 0 |
| china | hunan | littorina brevicula | species | 29 | 0 |
| china | jiangsu | littoraria flammea | species | 8 | 0 |
| china | jiangsu | littoraria sinensis | species | 30 | 0 |
| china | jiangsu | littorina brevicula | species | 212 | 0 |
| china | shandong | littoraria sinensis | species | 24 | 0 |
| china | shandong | littorina brevicula | species | 108 | 0 |
| china | zhejiang | littorina brevicula | species | 48 | 0 |
| cook islands | | tectarius cumingii | species | 4 | 0 |
| cook islands | | tectarius grandinatus | species | 4 | 0 |
| costa rica | | echinolittorina apicina | species | 3 | 0 |
| costa rica | | echinolittorina atrata | species | 3 | 0 |
| costa rica | | echinolittorina conspersa | species | 3 | 0 |
| costa rica | | echinolittorina dubiosa | species | 3 | 0 |
| costa rica | | echinolittorina fuscolineata | species | 2 | 0 |
| costa rica | | littoraria aberrans | species | 6 | 0 |
| costa rica | | littoraria pintado pullata | subspecies | 3 | 0 |
| costa rica | | littoraria rosewateri | species | 3 | 0 |
| costa rica | | littoraria varia | species | 3 | 0 |
| costa rica | | littoraria zebra | species | 3 | 0 |
| costa rica | puntarenas province | echinolittorina fuscolineata | species | 3 | 0 |
| costa rica | puntarenas province | echinolittorina tenuistriata | species | 27 | 0 |
| cuba | cienfuegos province | littoraria tessellata | species | 3 | 0 |
| denmark | | littorina littorea | species | 32 | 0 |
| dominican republic | | echinolittorina jamaicensis | species | 1 | 0 |
| east timor | dili district | littoraria scabra | species | 27 | 0 |
| ecuador | | echinolittorina conspersa | species | 3 | 0 |
| ecuador | | littoraria varia | species | 3 | 0 |
| ecuador | esmeraldas province | littoraria rosewateri | species | 3 | 0 |
| ecuador | esmeraldas province | littoraria variegata | species | 3 | 0 |
| ecuador | esmeraldas province | littoraria zebra | species | 4 | 0 |
| ecuador | galapagos province | echinolittorina galapagiensis | species | 5 | 0 |
| ecuador | galapagos province | echinolittorina porcata | species | 5 | 0 |
| ecuador | santa elena province | echinolittorina atrata | species | 3 | 0 |
| ecuador | santa elena province | echinolittorina paytensis | species | 6 | 0 |
| ecuador | santa elena province | echinolittorina santelenae | species | 17 | 0 |
| ecuador | santa elena province | echinolittorina tenuistriata | species | 3 | 0 |
| egypt | | echinolittorina millegrana | species | 2 | 0 |
| egypt | red sea governorate | echinolittorina millegrana | species | 5 | 0 |
| egypt | red sea governorate | echinolittorina subnodosa a | species | 3 | 0 |
| egypt | south sinai governorate | echinolittorina arabica b | species | 2 | 0 |
| egypt | south sinai governorate | echinolittorina subnodosa a | species | 815 | 0 |
| fiji | | echinolittorina feejeensis | species | 5 | 0 |
| fiji | | littoraria coccinea | species | 3 | 0 |
| fiji | | littoraria scabra | species | 3 | 0 |
| france | | littorina littorea | species | 23 | 0 |
| france | basse-normandie region | littorina littorea | species | 2 | 0 |
| france | bretagne region | littorina littorea | species | 85 | 0 |
| france | bretagne region | littorina obtusata | species | 1 | 0 |
| french polynesia | | echinolittorina cinerea | species | 4 | 0 |
| french polynesia | | echinolittorina trochoides c | species | 6 | 0 |
| french polynesia | | littoraria coccinea | species | 1 | 0 |
| french polynesia | | littoraria intermedia | species | 3 | 0 |
| french polynesia | marquesas islands | echinolittorina trochoides c | species | 6 | 0 |
| ghana | greater accra region | littoraria angulifera | species | 3 | 0 |
| ghana | western region | echinolittorina pulchella | species | 1 | 0 |
| ghana | western region | littoraria cingulifera | species | 6 | 0 |
| greenland | | littorina saxatilis | species | 1 | 0 |
| hong kong | | echinolittorina trochoides a | species | 1 | 0 |
| hong kong | | echinolittorina vidua | species | 6 | 0 |
| hong kong | | littoraria ardouiniana | species | 3 | 0 |
| hong kong | | littoraria articulata | species | 3 | 0 |
| hong kong | | littoraria melanostoma | species | 1 | 0 |
| hong kong | | littoraria sinensis | species | 1 | 0 |
| india | | cremnoconchus syhadrensis | species | 4 | 0 |
| india | | echinolittorina leucosticta | species | 8 | 0 |
| india | | littoraria undulata | species | 4 | 0 |
| india | kerala | echinolittorina leucosticta | species | 3 | 0 |
| india | kerala | echinolittorina trochoides a | species | 2 | 0 |
| india | kerala | littoraria undulata | species | 2 | 0 |
| india | tamil nadu | echinolittorina trochoides a | species | 4 | 0 |
| india | tamil nadu | littoraria scabra | species | 4 | 0 |
| indonesia | | echinolittorina quadricincta a | species | 5 | 0 |
| indonesia | | echinolittorina quadricincta b | species | 5 | 0 |
| indonesia | | echinolittorina quadricincta c | species | 2 | 0 |
| indonesia | | echinolittorina reticulata | species | 1 | 0 |
| indonesia | | echinolittorina trochoides a | species | 2 | 0 |
| indonesia | | echinolittorina vidua a | species | 3 | 0 |
| indonesia | bali province | echinolittorina sundaica | species | 3 | 0 |
| indonesia | banten province | echinolittorina sundaica | species | 41 | 0 |
| indonesia | east nusa tenggara province | echinolittorina trochoides d | species | 2 | 0 |
| indonesia | gorontalo province | echinolittorina millegrana | species | 1 | 0 |
| indonesia | gorontalo province | echinolittorina reticulata | species | 46 | 0 |
| indonesia | gorontalo province | echinolittorina trochoides d | species | 3 | 0 |
| indonesia | west nusa tenggara province | echinolittorina reticulata | species | 1 | 0 |
| indonesia | west nusa tenggara province | echinolittorina trochoides d | species | 4 | 0 |
| indonesia | west nusa tenggara province | littoraria carinifera | species | 3 | 0 |
| ireland | | littorina littorea | species | 8 | 0 |
| ireland | connaught province | littorina littorea | species | 28 | 0 |
| ireland | munster province | littorina littorea | species | 10 | 0 |
| israel | haifa district | echinolittorina punctata | species | 1 | 0 |
| israel | haifa district | echinolittorina punctata a | species | 3 | 0 |
| israel | southern district | echinolittorina arabica b | species | 3 | 0 |
| israel | southern district | echinolittorina millegrana | species | 4 | 0 |
| italy | emilia-romagna region | echinolittorina punctata | species | 2 | 0 |
| italy | lazio region | echinolittorina punctata | species | 1 | 0 |
| italy | sicily autonomous region | echinolittorina punctata | species | 1 | 0 |
| jamaica | | cenchritis muricatus | species | 4 | 0 |
| jamaica | | echinolittorina angustior | species | 3 | 0 |
| jamaica | | echinolittorina interrupta | species | 2 | 0 |
| jamaica | | echinolittorina mespillum | species | 3 | 0 |
| jamaica | | echinolittorina riisei | species | 3 | 0 |
| jamaica | | echinolittorina tuberculata | species | 3 | 0 |
| jamaica | | echinolittorina ziczac | species | 4 | 0 |
| jamaica | | echinolittorina ziczac a | species | 1 | 0 |
| jamaica | | littoraria angulifera | species | 3 | 0 |
| jamaica | | tectarius antonii | species | 4 | 0 |
| japan | | echinolittorina cinerea | species | 3 | 0 |
| japan | | echinolittorina trochoides e | species | 3 | 0 |
| japan | | echinolittorina vidua b | species | 3 | 0 |
| japan | | littoraria pintado | species | 4 | 0 |
| japan | | littorina horikawai | species | 4 | 0 |
| japan | | littorina sitkana | species | 17 | 0 |
| japan | | tectarius spinulosus | species | 4 | 0 |
| japan | aichi prefecture | littorina brevicula | species | 1 | 0 |
| japan | aomori prefecture | littorina brevicula | species | 13 | 0 |
| japan | chiba prefecture | littorina brevicula | species | 11 | 0 |
| japan | fukui prefecture | littorina brevicula | species | 6 | 0 |
| japan | hiroshima prefecture | littorina brevicula | species | 4 | 0 |
| japan | hokkaido prefecture | echinolittorina trochoides e | species | 4 | 0 |
| japan | hokkaido prefecture | littorina brevicula | species | 19 | 0 |
| japan | hokkaido prefecture | littorina sitkana | species | 24 | 0 |
| japan | hyogo prefecture | littorina brevicula | species | 1 | 0 |
| japan | kagoshima prefecture | echinolittorina trochoides e | species | 2 | 0 |
| japan | kagoshima prefecture | littorina brevicula | species | 11 | 0 |
| japan | kanagawa prefecture | echinolittorina trochoides e | species | 2 | 0 |
| japan | kanagawa prefecture | littorina brevicula | species | 10 | 0 |
| japan | miyazaki prefecture | littoraria intermedia | species | 3 | 0 |
| japan | miyazaki prefecture | littoraria sinensis | species | 3 | 0 |
| japan | oita prefecture | littorina brevicula | species | 4 | 0 |
| japan | okinawa prefecture | echinolittorina reticulata | species | 13 | 0 |
| japan | okinawa prefecture | echinolittorina trochoides e | species | 3 | 0 |
| japan | okinawa prefecture | echinolittorina vidua | species | 8 | 0 |
| japan | okinawa prefecture | littoraria pallescens | species | 3 | 0 |
| japan | okinawa prefecture | littoraria pintado | species | 4 | 0 |
| japan | okinawa prefecture | littoraria scabra | species | 3 | 0 |
| japan | okinawa prefecture | tectarius spinulosus | species | 4 | 0 |
| japan | saga prefecture | littoraria articulata | species | 1 | 0 |
| japan | shizuoka prefecture | littorina brevicula | species | 1 | 0 |
| japan | tokushima prefecture | echinolittorina radiata | species | 3 | 0 |
| japan | tokushima prefecture | echinolittorina trochoides e | species | 3 | 0 |
| japan | wakayama prefecture | echinolittorina trochoides e | species | 3 | 0 |
| kenya | | littoraria subvittata | species | 19 | 0 |
| madagascar | | echinolittorina reticulata | species | 3 | 0 |
| madagascar | | littoraria mauritiana | species | 3 | 0 |
| madagascar | | littoraria pallescens | species | 33 | 0 |
| madagascar | | littoraria pintado pintado | subspecies | 3 | 0 |
| madagascar | | littoraria subvittata | species | 23 | 0 |
| madagascar | atsimo-andrefana region | littoraria subvittata | species | 3 | 0 |
| malaysia | kedah | littoraria bengalensis | species | 3 | 0 |
| malaysia | sabah | echinolittorina trochoides a | species | 4 | 0 |
| malaysia | sabah | littoraria carinifera | species | 3 | 0 |
| malaysia | sabah | littoraria pallescens | species | 10 | 0 |
| malaysia | sarawak | echinolittorina trochoides a | species | 1 | 0 |
| malaysia | sarawak | echinolittorina vidua | species | 3 | 0 |
| malaysia | sarawak | littoraria albicans | species | 6 | 0 |
| malaysia | sarawak | littoraria vespacea | species | 3 | 0 |
| malaysia | terengganu | echinolittorina vidua | species | 21 | 0 |
| mauritius | | echinolittorina millegrana | species | 1 | 0 |
| mauritius | | echinolittorina reticulata | species | 4 | 0 |
| mauritius | | littoraria mauritiana | species | 3 | 0 |
| mauritius | | littoraria pintado pintado | subspecies | 3 | 0 |
| mexico | | echinolittorina tuberculata | species | 1 | 0 |
| mexico | baja california | echinolittorina albicarinata | species | 5 | 0 |
| mexico | baja california | echinolittorina aspera | species | 3 | 0 |
| mexico | baja california | echinolittorina modesta | species | 3 | 0 |
| mexico | baja california | echinolittorina penicillata | species | 5 | 0 |
| mexico | baja california | littoraria pintado pullata | subspecies | 3 | 0 |
| mexico | campeche | littoraria nebulosa | species | 7 | 0 |
| mexico | jalisco | echinolittorina apicina | species | 3 | 0 |
| mexico | jalisco | echinolittorina aspera | species | 3 | 0 |
| mexico | jalisco | echinolittorina modesta | species | 2 | 0 |
| mexico | jalisco | echinolittorina parcipicta | species | 5 | 0 |
| mexico | quintana roo | echinolittorina tuberculata | species | 4 | 0 |
| mexico | sinaloa | littoraria variegata | species | 7 | 0 |
| mexico | veracruz-llave | littoraria nebulosa | species | 6 | 0 |
| morocco | rabat-sale-zemmour-zaer | echinolittorina punctata | species | 3 | 0 |
| morocco | souss-massa-draa | echinolittorina punctata a | species | 3 | 0 |
| mozambique | | littoraria subvittata | species | 37 | 0 |
| mozambique | cabo delgado province | littoraria intermedia | species | 3 | 0 |
| mozambique | cabo delgado province | littoraria pallescens | species | 3 | 0 |
| mozambique | cabo delgado province | littoraria scabra | species | 3 | 0 |
| mozambique | cabo delgado province | littoraria subvittata | species | 3 | 0 |
| netherlands | | littorina littorea | species | 5 | 0 |
| netherlands | zeeland province | littorina littorea | species | 0 | 2 |
| new zealand | canterbury | austrolittorina antipodum | species | 6 | 0 |
| new zealand | canterbury | austrolittorina cincta | species | 4 | 0 |
| northern mariana islands | | tectarius viviparus | species | 4 | 0 |
| northern mariana islands | tinian municipality | tectarius viviparus | species | 201 | 0 |
| norway | | littorina littorea | species | 5 | 0 |
| norway | more og romsdal county | littorina saxatilis | species | 0 | 1 |
| norway | sor-trondelag county | littorina littorea | species | 73 | 0 |
| norway | troms county | littorina arcana | species | 4 | 0 |
| norway | troms county | littorina compressa | species | 3 | 0 |
| norway | troms county | littorina fabalis | species | 1 | 0 |
| norway | troms county | littorina littorea | species | 32 | 0 |
| norway | troms county | littorina obtusata | species | 15 | 0 |
| norway | troms county | littorina saxatilis | species | 5 | 0 |
| oman | | echinolittorina arabica a | species | 3 | 0 |
| oman | ash sharqiyah north governorate | echinolittorina subnodosa b | species | 6 | 0 |
| panama | bocas del toro province | echinolittorina interrupta | species | 3 | 0 |
| panama | bocas del toro province | echinolittorina meleagris | species | 4 | 0 |
| panama | bocas del toro province | echinolittorina meleagris a | species | 1 | 0 |
| panama | bocas del toro province | littoraria tessellata | species | 3 | 0 |
| panama | panama province | echinolittorina dubiosa | species | 3 | 0 |
| papua new guinea | | echinolittorina trochoides b | species | 4 | 0 |
| papua new guinea | milne bay province | littoraria coccinea | species | 1 | 0 |
| papua new guinea | milne bay province | littoraria undulata | species | 2 | 0 |
| peru | lima region | echinolittorina peruviana | species | 5 | 0 |
| philippines | | echinolittorina millegrana | species | 1 | 0 |
| philippines | | echinolittorina quadricincta c | species | 3 | 0 |
| philippines | | echinolittorina reticulata | species | 2 | 0 |
| philippines | | echinolittorina trochoides a | species | 1 | 0 |
| philippines | | echinolittorina vidua | species | 3 | 0 |
| philippines | central visayas region | littoraria intermedia | species | 3 | 0 |
| philippines | central visayas region | littoraria lutea | species | 12 | 0 |
| philippines | eastern visayas region | littoraria undulata | species | 4 | 0 |
| pitcairn | | echinolittorina pascua | species | 3 | 0 |
| portugal | lisboa district | melarhaphe neritoides | species | 114 | 0 |
| portugal | viana do castelo district | littorina obtusata | species | 2 | 0 |
| portugal | viana do castelo district | littorina saxatilis | species | 3 | 0 |
| russia | | littorina littorea | species | 21 | 0 |
| russia | | littorina sitkana | species | 5 | 0 |
| saint helena | | echinolittorina helenae | species | 6 | 0 |
| saint helena | | echinolittorina miliaris | species | 6 | 0 |
| sao tome and principe | | echinolittorina granosa | species | 2 | 0 |
| sao tome and principe | | echinolittorina meleagris b | species | 2 | 0 |
| sao tome and principe | | echinolittorina ziczac b | species | 6 | 0 |
| sao tome and principe | principe | echinolittorina meleagris b | species | 1 | 0 |
| senegal | dakar region | echinolittorina punctata | species | 6 | 0 |
| senegal | fatick region | littoraria angulifera | species | 4 | 0 |
| singapore | | echinolittorina vidua b | species | 3 | 0 |
| singapore | | littoraria articulata | species | 3 | 0 |
| singapore | | littoraria conica | species | 5 | 0 |
| singapore | | littoraria melanostoma | species | 3 | 0 |
| singapore | | littoraria vespacea | species | 3 | 0 |
| singapore | | mainwaringia leithii | species | 4 | 0 |
| singapore | | mainwaringia rhizophila | species | 4 | 0 |
| south africa | eastern cape province | afrolittorina africana | species | 4 | 0 |
| south africa | eastern cape province | afrolittorina knysnaensis | species | 5 | 0 |
| south africa | kwazulu-natal province | echinolittorina natalensis | species | 3 | 0 |
| south korea | | littorina brevicula | species | 1 | 0 |
| spain | | littorina littorea | species | 5 | 0 |
| spain | | littorina saxatilis | species | 5 | 0 |
| spain | | littorina sp. f1c2 | species | 1 | 0 |
| spain | | melarhaphe neritoides | species | 4 | 0 |
| spain | catalonia | echinolittorina punctata | species | 1 | 0 |
| spain | galicia | littorina fabalis | species | 1 | 0 |
| spain | galicia | littorina littorea | species | 33 | 0 |
| spain | galicia | littorina obtusata | species | 1 | 0 |
| spain | galicia | littorina saxatilis | species | 101 | 0 |
| spain | galicia | melarhaphe neritoides | species | 117 | 0 |
| sri lanka | | littoraria coccinea glabrata | species | 3 | 0 |
| sri lanka | southern province | echinolittorina leucosticta | species | 3 | 0 |
| sri lanka | southern province | echinolittorina novaezelandiae | species | 6 | 0 |
| sri lanka | southern province | echinolittorina reticulata | species | 5 | 0 |
| sri lanka | southern province | echinolittorina trochoides a | species | 51 | 0 |
| sweden | | littorina fabalis | species | 5 | 0 |
| sweden | | littorina littorea | species | 6 | 0 |
| sweden | | littorina obtusata | species | 1 | 0 |
| sweden | | littorina saxatilis | species | 2 | 0 |
| sweden | vastra gotaland | littorina littorea | species | 16 | 0 |
| taiwan | | littoraria ardouiniana | species | 3 | 0 |
| taiwan | | littoraria sinensis | species | 3 | 0 |
| taiwan | | littoraria undulata | species | 3 | 0 |
| taiwan | kaohsiung municipality | echinolittorina trochoides a | species | 2 | 0 |
| taiwan | kaohsiung municipality | echinolittorina vidua | species | 11 | 0 |
| tanzania | | littoraria pallescens | species | 101 | 0 |
| tanzania | | littoraria subvittata | species | 107 | 0 |
| tanzania | dar es salaam region | echinolittorina natalensis | species | 3 | 0 |
| tanzania | dar es salaam region | littoraria undulata | species | 3 | 0 |
| thailand | | echinolittorina vidua | species | 2 | 0 |
| thailand | chonburi province | littoraria strigata | species | 35 | 0 |
| thailand | ranong province | echinolittorina vidua | species | 5 | 0 |
| thailand | surat thani province | echinolittorina melanacme | species | 3 | 0 |
| thailand | surat thani province | echinolittorina trochoides a | species | 6 | 0 |
| turkey | hatay province | echinolittorina punctata | species | 2 | 0 |
| united arab emirates | fujairah | echinolittorina millegrana | species | 6 | 0 |
| united arab emirates | ras al-khaimah | echinolittorina arabica a | species | 58 | 0 |
| united kingdom | | littorina littorea | species | 18 | 0 |
| united kingdom | england | littorina littorea | species | 34 | 3 |
| united kingdom | england | littorina obtusata | species | 5 | 0 |
| united kingdom | england | littorina saxatilis | species | 281 | 1 |
| united kingdom | england | melarhaphe neritoides | species | 12 | 0 |
| united kingdom | scotland | littorina littorea | species | 84 | 0 |
| united kingdom | scotland | melarhaphe neritoides | species | 54 | 0 |
| united kingdom | wales | littorina littorea | species | 0 | 1 |
| united states | | littorina keenae | species | 1 | 0 |
| united states | | littorina littorea | species | 37 | 0 |
| united states | | littorina scutulata | species | 1 | 0 |
| united states | alabama | echinolittorina placida | species | 1 | 0 |
| united states | alabama | littoraria irrorata | species | 6 | 0 |
| united states | alaska | littorina sitkana | species | 10 | 0 |
| united states | california | littorina keenae | species | 4 | 0 |
| united states | california | littorina plena | species | 5 | 0 |
| united states | florida | echinolittorina placida | species | 1 | 0 |
| united states | georgia | littoraria irrorata | species | 88 | 0 |
| united states | hawaii | echinolittorina hawaiiensis | species | 8 | 0 |
| united states | hawaii | littoraria intermedia | species | 5 | 0 |
| united states | hawaii | littoraria pintado | species | 1 | 0 |
| united states | hawaii | littoraria pintado pintado | subspecies | 3 | 0 |
| united states | maine | littorina littorea | species | 27 | 0 |
| united states | maine | littorina obtusata | species | 1 | 0 |
| united states | maryland | littoraria irrorata | species | 1 | 0 |
| united states | massachusetts | littorina littorea | species | 19655 | 0 |
| united states | new hampshire | littorina littorea | species | 4 | 0 |
| united states | new york | littorina littorea | species | 3 | 0 |
| united states | south carolina | echinolittorina interrupta | species | 4 | 0 |
| united states | virginia | littorina saxatilis | species | 3 | 0 |
| vietnam | | echinolittorina trochoides a | species | 1 | 0 |
| vietnam | | echinolittorina vidua | species | 2 | 0 |
| vietnam | khanh hoa province | echinolittorina trochoides a | species | 1 | 0 |
| vietnam | khanh hoa province | echinolittorina vidua | species | 2 | 0 |
| vietnam | khanh hoa province | littoraria ardouiniana | species | 3 | 0 |
| vietnam | quang ninh province | echinolittorina radiata | species | 10 | 0 |
| vietnam | quang ninh province | littoraria melanostoma | species | 3 | 0 |
| vietnam | quang ninh province | peasiella lutulenta | species | 4 | 0 |
| vietnam | quang ninh province | peasiella roepstorffiana | species | 6 | 0 |