| anguilla | | contracaecum rudolphii | species | 0 | 1 |
| anguilla | | contracaecum rudolphii a bullini et al., 1986 | species | 0 | 1 |
| antarctica | | contracaecum cf. osculatum d sm-2008 | species | 1 | 0 |
| antarctica | | contracaecum cf. osculatum e sm-2008 | species | 1 | 0 |
| antarctica | | contracaecum mirounga | species | 1 | 0 |
| antarctica | | contracaecum radiatum | species | 1 | 0 |
| argentina | | contracaecum ogmorhini | species | 1 | 0 |
| argentina | | contracaecum pelagicum | species | 7 | 0 |
| argentina | chubut province | contracaecum pelagicum | species | 0 | 1 |
| australia | | contracaecum microcephalum | species | 4 | 0 |
| australia | | contracaecum multipapillatum | species | 4 | 0 |
| australia | | contracaecum ogmorhini | species | 13 | 0 |
| australia | | contracaecum ogmorhini sensu lato australia | species | 1 | 0 |
| australia | | contracaecum pyripapillatum | species | 2 | 0 |
| australia | | contracaecum rudolphii | species | 10 | 0 |
| australia | | contracaecum sp. bloomfield | species | 2 | 0 |
| australia | new south wales | contracaecum osculatum | species | 25 | 0 |
| australia | queensland | contracaecum osculatum | species | 7 | 0 |
| australia | south australia | contracaecum eudyptulae | species | 0 | 1 |
| australia | south australia | contracaecum microcephalum | species | 0 | 1 |
| australia | south australia | contracaecum ogmorhini | species | 0 | 1 |
| australia | south australia | contracaecum osculatum | species | 15 | 0 |
| australia | victoria | contracaecum eudyptulae | species | 1 | 0 |
| australia | victoria | contracaecum multipapillatum | species | 10 | 0 |
| australia | victoria | contracaecum pyripapillatum | species | 4 | 0 |
| australia | western australia | contracaecum multipapillatum | species | 5 | 1 |
| australia | western australia | contracaecum ogmorhini | species | 2 | 1 |
| brazil | | contracaecum pelagicum | species | 3 | 0 |
| brazil | | contracaecum sp. jm-2015 | species | 2 | 0 |
| brazil | rio de janeiro | contracaecum pelagicum | species | 0 | 1 |
| brazil | rio grande do sul | contracaecum rudolphii | species | 0 | 1 |
| canada | | contracaecum cf. osculatum a sm-2008 | species | 1 | 0 |
| canada | | contracaecum cf. osculatum b sm-2008 | species | 1 | 0 |
| canada | | contracaecum margolisi | species | 5 | 0 |
| canada | | contracaecum ogmorhini | species | 4 | 0 |
| canada | | contracaecum sp. coa1 | species | 1 | 0 |
| canada | ontario | contracaecum margolisi | species | 5 | 0 |
| canada | ontario | contracaecum ogmorhini | species | 4 | 0 |
| canada | saskatchewan | contracaecum spiculigerum | species | 0 | 1 |
| china | | contracaecum rudolphii b bullini et al., 1986 | species | 4 | 0 |
| china | guangdong | contracaecum rudolphii b bullini et al., 1986 | species | 16 | 0 |
| china | qinghai | contracaecum rudolphii | species | 2 | 0 |
| colombia | | contracaecum bioccai | species | 9 | 0 |
| colombia | | contracaecum osculatum | species | 1 | 0 |
| colombia | tolima department | contracaecum bioccai | species | 1 | 0 |
| costa rica | | contracaecum multipapillatum | species | 6 | 0 |
| costa rica | guanacaste province | contracaecum multipapillatum | species | 121 | 0 |
| denmark | | contracaecum osculatum | species | 111 | 0 |
| denmark | capital region of denmark | contracaecum osculatum | species | 47 | 0 |
| denmark | central denmark region | contracaecum osculatum | species | 105 | 0 |
| egypt | | contracaecum micropapillatum | species | 4 | 0 |
| egypt | aswan governorate | contracaecum micropapillatum | species | 1 | 0 |
| germany | | contracaecum osculatum | species | 1 | 0 |
| germany | brandenburg | contracaecum microcephalum | species | 0 | 1 |
| germany | lower saxony | contracaecum osculatum | species | 0 | 1 |
| germany | saxony | contracaecum osculatum | species | 0 | 1 |
| germany | schleswig-holstein | contracaecum rudolphii | species | 2 | 0 |
| greece | | contracaecum aff. multipapillatum a sm-2008 | species | 6 | 0 |
| greece | | contracaecum aff. multipapillatum b sm-2008 | species | 6 | 0 |
| greece | | contracaecum micropapillatum | species | 1 | 0 |
| greece | | contracaecum multipapillatum | species | 1 | 0 |
| greece | peloponnese region | contracaecum micropapillatum | species | 2 | 0 |
| greenland | | contracaecum osculatum | species | 2 | 0 |
| greenland | | contracaecum osculatum c sensu nascetti et al. (1993) | species | 16 | 0 |
| guatemala | | contracaecum multipapillatum | species | 8 | 0 |
| guatemala | izabal department | contracaecum multipapillatum | species | 48 | 0 |
| guatemala | jutiapa department | contracaecum multipapillatum | species | 3 | 0 |
| iceland | | contracaecum septentrionale | species | 3 | 0 |
| iceland | capital region | contracaecum septentrionale | species | 21 | 0 |
| india | | contracaecum osculatum | species | 1 | 0 |
| india | | contracaecum sp. n. 14 nj-2013 | species | 1 | 0 |
| india | | contracaecum sp. n. 17 nj-2013 | species | 1 | 0 |
| india | | contracaecum sp. n. 26 nj-2013 | species | 1 | 0 |
| iran | hormozgan province | contracaecum multipapillatum | species | 1 | 0 |
| iraq | | contracaecum microcephalum | species | 8 | 0 |
| iraq | | contracaecum multipapillatum | species | 5 | 0 |
| iraq | | contracaecum muraenesoxi | species | 5 | 0 |
| iraq | | contracaecum ogmorhini | species | 3 | 0 |
| iraq | | contracaecum rudolphii | species | 3 | 0 |
| iraq | | contracaecum septentrionale | species | 2 | 0 |
| italy | | contracaecum rudolphii | species | 6 | 0 |
| italy | | contracaecum rudolphii a bullini et al., 1986 | species | 7 | 0 |
| italy | | contracaecum rudolphii b bullini et al., 1986 | species | 7 | 0 |
| italy | apulia region | contracaecum rudolphii | species | 2 | 0 |
| italy | campania region | contracaecum rudolphii | species | 11 | 0 |
| italy | sardinia autonomous region | contracaecum rudolphii | species | 2 | 2 |
| italy | sardinia autonomous region | contracaecum rudolphii a bullini et al., 1986 | species | 1 | 2 |
| italy | veneto region | contracaecum rudolphii | species | 8 | 0 |
| italy | veneto region | contracaecum rudolphii a bullini et al., 1986 | species | 15 | 0 |
| italy | veneto region | contracaecum rudolphii b bullini et al., 1986 | species | 6 | 0 |
| japan | | contracaecum osculatum | species | 1 | 0 |
| japan | mie prefecture | contracaecum bioccai | species | 2 | 0 |
| japan | wakayama prefecture | contracaecum spiculigerum | species | 2 | 1 |
| mexico | baja california | contracaecum multipapillatum | species | 0 | 1 |
| mexico | guerrero | contracaecum multipapillatum | species | 0 | 1 |
| mexico | nuevo leon | contracaecum rudolphii | species | 1 | 0 |
| mexico | yucatan | contracaecum multipapillatum | species | 0 | 1 |
| montenegro | | contracaecum microcephalum | species | 5 | 0 |
| morocco | | contracaecum cf. osculatum c ak-2008 | species | 1 | 0 |
| norway | | contracaecum osculatum a sensu nascetti et al. (1993) | species | 42 | 0 |
| norway | | contracaecum osculatum b sensu nascetti et al. (1993) | species | 42 | 0 |
| norway | | contracaecum osculatum c sensu nascetti et al. (1993) | species | 8 | 0 |
| norway | | contracaecum septentrionale | species | 2 | 0 |
| norway | finnmark county | contracaecum osculatum a sensu nascetti et al. (1993) | species | 40 | 0 |
| norway | finnmark county | contracaecum osculatum b sensu nascetti et al. (1993) | species | 40 | 0 |
| norway | finnmark county | contracaecum osculatum c sensu nascetti et al. (1993) | species | 8 | 0 |
| norway | more og romsdal county | contracaecum osculatum | species | 0 | 1 |
| poland | | contracaecum osculatum | species | 16 | 0 |
| poland | | contracaecum rudolphii a bullini et al., 1986 | species | 1 | 0 |
| poland | greater poland province | contracaecum osculatum | species | 1 | 0 |
| poland | greater poland province | contracaecum rudolphii | species | 5 | 0 |
| poland | mazovia province | contracaecum rudolphii | species | 1 | 0 |
| portugal | acores autonomous region | contracaecum sp. pb-2010 | species | 1 | 0 |
| puerto rico | | contracaecum multipapillatum | species | 0 | 1 |
| russia | | contracaecum osculatum baicalensis | subspecies | 1 | 0 |
| russia | | contracaecum rudolphii | species | 2 | 0 |
| south africa | | contracaecum ogmorhini | species | 7 | 0 |
| south africa | | contracaecum ogmorhini sensu lato south africa | species | 1 | 0 |
| south korea | | contracaecum osculatum | species | 6 | 0 |
| spain | | contracaecum septentrionale | species | 11 | 0 |
| spain | asturias | contracaecum septentrionale | species | 9 | 0 |
| spain | galicia | contracaecum rudolphii | species | 0 | 1 |
| spain | navarra | contracaecum septentrionale | species | 2 | 0 |
| sweden | | contracaecum osculatum | species | 1 | 0 |
| taiwan | | contracaecum muraenesoxi | species | 0 | 1 |
| tanzania | kagera region | contracaecum sp. lv50 | species | 1 | 0 |
| united states | | contracaecum margolisi | species | 1 | 0 |
| united states | alaska | contracaecum osculatum | species | 0 | 2 |
| united states | california | contracaecum multipapillatum | species | 0 | 1 |
| united states | california | contracaecum sp. san-2004 | species | 8 | 0 |
| united states | florida | contracaecum bioccai | species | 2 | 0 |
| united states | florida | contracaecum multipapillatum | species | 1 | 0 |
| united states | florida | contracaecum rudolphii | species | 4 | 0 |
| united states | florida | contracaecum rudolphii c d'amelio et al., 2007 | species | 12 | 0 |
| united states | florida | contracaecum rudolphii f sda-2011 | species | 1 | 0 |
| united states | florida | contracaecum sp. n. 1 sc-2011 | species | 1 | 0 |
| united states | florida | contracaecum sp. pel3 | species | 1 | 0 |
| united states | florida | contracaecum sp. sda-2011 | species | 2 | 0 |
| united states | indiana | contracaecum bioccai | species | 1 | 0 |
| united states | indiana | contracaecum rudolphii f sda-2011 | species | 1 | 0 |
| united states | south carolina | contracaecum rudolphii | species | 2 | 0 |
| zimbabwe | harare province | contracaecum rudolphii | species | 0 | 1 |