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Page last updated
5 December 2017

Unionoida cum Grano Salis

Nearctic Region

Neartic SubregionsThe Nearctic Region includes all of North America, north of the Mexican Plateau. It is the most most species-rich region in the world, with 302 species. The families represented are Unionidae and Margaritiferidae.

Nearctica is composed of five subregions. The largest is the Interior Subregion (NA1; 142 spp.) which includes the Mississippi Basin and the adjacent, formerly glaciated areas of the Great Lakes and the Canadian Interior basins. The streams draining directly to the Atlantic comprise the Atlantic Subregion (NA2; 50 spp.), which extends from the glaciated portions of eastern Canada and the USA, south to Georgia. The Gulf Subregion (NA3; 142 spp.) is a real hot-spot of freshwater mussel diversity that occurs from the Rio Grande Basin in Mexico, east to the Suwanee in Florida. Sandwiched in between the Atlantic and Gulf subregions is the Florida Subregion (NA4; 13 spp.) which occupies peninsular Florida. West of the continental divide is the Pacific Subregion (NA5; 8 spp.). The Pacific Subregion shares closer affinities with Palearctica than the rest of Nearctica.

Endemic species are marked with an asterisk (*).

Interior Subregion (NA1)
 
  1. Alasmidonta atropurpurea*
  2. Alasmidonta marginata
  3. Alasmidonta raveneliana*
  4. Alasmidonta viridis*
  5. Amblema plicata
  6. Anodontoides denigrata*
  7. Anodontoides ferussacianus*
  8. Arcidens confragosus
  9. Arcidens wheeleri*
  10. Cyclonaias nodulata*
  11. Cyclonaias pustulosa*
  12. Cyclonaias tuberculata*
  13. Cyprogenia aberti*
  14. Cyprogenia stegaria*
  15. Dromus dromas*
  16. Ellipsaria lineolata
  17. Elliptio complanata
  18. Elliptio crassidens
  19. Epioblasma ahlstedti*
  20. Epioblasma arcaeformis*
  21. Epioblasma aureola*
  22. Epioblasma biemarginata*
  23. Epioblasma brevidens*
  24. Epioblasma capsaeformis*
  25. Epioblasma cincinnatiensis*
  26. Epioblasma curtisii*
  27. Epioblasma flexuosa*
  28. Epioblasma florentina*
  29. Epioblasma gubernaculum*
  30. Epioblasma haysiana*
  31. Epioblasma lenior*
  32. Epioblasma lewisii*
  33. Epioblasma obliquata*
  34. Epioblasma perobliqua*
  35. Epioblasma personata*
  36. Epioblasma propinqua*
  37. Epioblasma rangiana*
  38. Epioblasma sampsonii*
  39. Epioblasma stewardsonii*
  40. Epioblasma torulosa*
  41. Epioblasma triquetra*
  42. Epioblasma turgidula*
  43. Epioblasma walkeri*
  44. Eurynia dilatata*
  45. Fusconaia cor*
  46. Fusconaia cuneolus*
  47. Fusconaia flava
  48. Fusconaia ozarkensis*
  49. Fusconaia subrotunda*
  50. Hemistena lata*
  51. Lampsilis abrupta*
  52. Lampsilis brittsi*
  53. Lampsilis cardium*
  54. Lampsilis fasciola*
  55. Lampsilis higginsii*
  56. Lampsilis hydiana
  57. Lampsilis ovata*
  58. Lampsilis powellii*
  59. Lampsilis rafinesqueana*
  60. Lampsilis reeveiana*
  61. Lampsilis satura
  62. Lampsilis siliquoidea*
  63. Lampsilis streckeri*
  64. Lampsilis teres
  65. Lampsilis virescens*
  66. Lasmigona complanata
  67. Lasmigona compressa*
  68. Lasmigona costata*
  69. Lasmigona holstonia*
  70. Lasmigona subviridis
  71. Lemiox rimosus*
  1. Leptodea fragilis
  2. Leptodea leptodon*
  3. Ligumia nasuta
  4. Ligumia recta
  5. Ligumia subrostrata*
  6. Margaritifera falcata
  7. Margaritifera monodonta*
  8. Medionidus conradicus*
  9. Megalonaias nervosa
  10. Obliquaria reflexa
  11. Obovaria arkansasensis
  12. Obovaria olivaria*
  13. Obovaria retusa*
  14. Obovaria subrotunda*
  15. Ortmanniana ligamentina*
  16. Ortmanniana pectorosa*
  17. Pegias fabula*
  18. Plectomerus dombeyanus
  19. Plethobasus cicatricosus*
  20. Plethobasus cooperianus*
  21. Plethobasus cyphyus*
  22. Pleurobema clava*
  23. Pleurobema cordatum*
  24. Pleurobema oviforme*
  25. Pleurobema plenum*
  26. Pleurobema rubrum*
  27. Pleurobema sintoxia*
  28. Pleuronaia barnesiana*
  29. Pleuronaia dolabelloides*
  30. Pleuronaia gibber*
  31. Potamilus alatus
  32. Potamilus capax*
  33. Potamilus ohiensis
  34. Potamilus purpuratus
  35. Ptychobranchus fasciolaris*
  36. Ptychobranchus occidentalis*
  37. Ptychobranchus subtentus*
  38. Pyganodon grandis
  39. Pyganodon lacustris
  40. Quadrula apiculata
  41. Quadrula fragosa*
  42. Quadrula nobilis
  43. Quadrula quadrula
  44. Reginaia ebena
  45. Simpsonaias ambigua*
  46. Strophitus undulatus
  47. Theliderma cylindrica*
  48. Theliderma intermedia*
  49. Theliderma metanevra
  50. Theliderma sparsa*
  51. Toxolasma cylindrellus*
  52. Toxolasma lividum*
  53. Toxolasma parvum
  54. Toxolasma texasiense
  55. Tritogonia verrucosa
  56. Truncilla donaciformis
  57. Truncilla truncata*
  58. Uniomerus tetralasmus
  59. Utterbackia imbecillis
  60. Utterbackiana suborbiculata
  61. Venustaconcha ellipsiformis*
  62. Venustaconcha pleasii*
  63. Venustaconcha trabalis*
  64. Venustaconcha troostensis*
  65. Villosa fabalis*
  66. Villosa iris*
  67. Villosa lienosa
  68. Villosa ortmanni*
  69. Villosa sima*
  70. Villosa taeniata*
  71. Villosa vanuxemensis*
Atlantic Subregion (NA2)
 
  1. Alasmidonta arcula*
  2. Alasmidonta heterodon*
  3. Alasmidonta marginata
  4. Alasmidonta robusta*
  5. Alasmidonta undulata*
  6. Alasmidonta varicosa*
  7. Elliptio angustata*
  8. Elliptio arctata
  9. Elliptio cistellaeformis*
  10. Elliptio complanata
  11. Elliptio congaraea*
  12. Elliptio dariensis
  13. Elliptio downiei*
  14. Elliptio fisheriana*
  15. Elliptio folliculata*
  16. Elliptio fraterna
  17. Elliptio hopetonensis*
  18. Elliptio icterina*
  19. Elliptio lanceolata
  20. Elliptio marsupiobesa*
  21. Elliptio producta*
  22. Elliptio roanokensis*
  23. Elliptio shepardiana*
  24. Elliptio spinosa*
  25. Fusconaia masoni*
  1. Lampsilis cariosa*
  2. Lampsilis dolabraeformis*
  3. Lampsilis radiata*
  4. Lampsilis splendida*
  5. Lasmigona decorata*
  6. Lasmigona subviridis
  7. Leptodea ochracea*
  8. Ligumia nasuta
  9. Margaritifera margaritifera
  10. Parvaspina collina*
  11. Parvaspina steinstansana*
  12. Pyganodon cataracta
  13. Pyganodon fragilis*
  14. Pyganodon gibbosa*
  15. Pyganodon lacustris
  16. Sinanodonta woodiana
  17. Strophitus undulatus
  18. Toxolasma pullus*
  19. Uniomerus caroliniana
  20. Utterbackiana couperiana
  21. Utterbackiana implicata*
  22. Villosa constricta*
  23. Villosa delumbis*
  24. Villosa vaughaniana*
  25. Villosa vibex
Gulf Subregion (NA3)
 
  1. Alasmidonta mccordi*
  2. Alasmidonta triangulata*
  3. Alasmidonta wrightiana*
  4. Amblema elliottii*
  5. Amblema neislerii*
  6. Amblema plicata
  7. Anodontoides radiatus*
  8. Arcidens confragosus
  9. Cyclonaias archeri*
  10. Cyclonaias asperata*
  11. Cyclonaias aurea*
  12. Cyclonaias houstonensis*
  13. Cyclonaias infucata*
  14. Cyclonaias kieneriana*
  15. Cyclonaias kleiniana*
  16. Cyclonaias mortoni*
  17. Cyclonaias petrina*
  18. Cyclonaias refulgens*
  19. Cyclonaias succissa*
  20. Cyrtonaias saladoensis*
  21. Cyrtonaias tampicoensis
  22. Disconaias conchos*
  23. Disconaias fimbriata
  24. Ellipsaria lineolata
  25. Elliptio arca*
  26. Elliptio arctata
  27. Elliptio chipolaensis*
  28. Elliptio crassidens
  29. Elliptio fraterna
  30. Elliptio fumata*
  31. Elliptio jayensis
  32. Elliptio lanceolata
  33. Elliptio mcmichaeli*
  34. Elliptio nigella*
  35. Elliptio pullata*
  36. Elliptio purpurella*
  37. Elliptoideus sloatianus*
  38. Epioblasma metastriata*
  39. Epioblasma othcaloogensis*
  40. Epioblasma penita*
  41. Fusconaia burkei*
  42. Fusconaia cerina*
  43. Fusconaia chunii*
  44. Fusconaia escambia*
  45. Fusconaia flava
  46. Fusconaia mitchelli*
  47. Glebula rotundata*
  48. Hamiota altilis*
  49. Hamiota australis*
  50. Hamiota perovalis*
  51. Hamiota subangulata*
  52. Lampsilis binominata*
  53. Lampsilis bracteata*
  54. Lampsilis floridensis
  55. Lampsilis hydiana
  56. Lampsilis ornata*
  57. Lampsilis satura
  58. Lampsilis straminea*
  59. Lampsilis teres
  60. Lasmigona alabamensis*
  61. Lasmigona complanata
  62. Lasmigona etowaensis*
  63. Lasmigona subviridis
  64. Leptodea fragilis
  65. Ligumia recta
  66. Margaritifera hembeli*
  67. Margaritifera marrianae*
  68. Medionidus acutissimus*
  69. Medionidus parvulus*
  70. Medionidus penicillatus*
  71. Medionidus simpsonianus*
  1. Medionidus walkeri*
  2. Megalonaias nervosa
  3. Obliquaria reflexa
  4. Obovaria arkansasensis
  5. Obovaria choctawensis*
  6. Obovaria haddletoni*
  7. Obovaria unicolor*
  8. Plectomerus dombeyanus
  9. Pleurobema athearni*
  10. Pleurobema beadleianum*
  11. Pleurobema curtum*
  12. Pleurobema decisum*
  13. Pleurobema fibuloides*
  14. Pleurobema georgianum*
  15. Pleurobema hanleyianum*
  16. Pleurobema hartmanianum*
  17. Pleurobema marshalli*
  18. Pleurobema perovatum*
  19. Pleurobema pyriforme*
  20. Pleurobema riddellii*
  21. Pleurobema rubellum*
  22. Pleurobema stabile*
  23. Pleurobema strodeanum*
  24. Pleurobema taitianum*
  25. Pleurobema verum*
  26. Popenaias popeii
  27. Potamilus alatus
  28. Potamilus amphichaenus*
  29. Potamilus inflatus*
  30. Potamilus metnecktayi*
  31. Potamilus ohiensis
  32. Potamilus purpuratus
  33. Ptychobranchus foremanianus*
  34. Ptychobranchus greenii*
  35. Ptychobranchus jonesi*
  36. Pyganodon cataracta
  37. Pyganodon grandis
  38. Quadrula apiculata
  39. Quadrula couchiana*
  40. Quadrula nobilis
  41. Quadrula quadrula
  42. Quadrula rumphiana*
  43. Reginaia apalachicola*
  44. Reginaia ebena
  45. Reginaia rotulata*
  46. Sphenonaias taumilapana*
  47. Strophitus connasaugaensis*
  48. Strophitus subvexus*
  49. Theliderma metanevra
  50. Theliderma stapes*
  51. Toxolasma corvunculus*
  52. Toxolasma parvum
  53. Toxolasma paulum
  54. Toxolasma texasiense
  55. Tritogonia verrucosa
  56. Truncilla cognata*
  57. Truncilla donaciformis
  58. Truncilla macrodon*
  59. Uniomerus columbensis*
  60. Uniomerus declivis*
  61. Uniomerus tetralasmus
  62. Utterbackia imbecillis
  63. Utterbackia peggyae*
  64. Utterbackiana hartfieldorum*
  65. Utterbackiana heardi*
  66. Utterbackiana suborbiculata
  67. Villosa lienosa
  68. Villosa nebulosa*
  69. Villosa umbrans*
  70. Villosa vibex
  71. Villosa villosa
Florida Subregion (NA4)
 
  1. Elliptio ahenea*
  2. Elliptio dariensis
  3. Elliptio jayensis
  4. Elliptio monroensis*
  5. Elliptio occulta*
  6. Lampsilis floridensis
  7. Toxolasma paulum
  1. Uniomerus caroliniana
  2. Utterbackia peninsularis*
  3. Utterbackiana couperiana
  4. Villosa amygdalum*
  5. Villosa vibex
  6. Villosa villosa
Pacific Subregion (NA5)
 
  1. Anodonta californiensis
  2. Anodonta impura
  3. Anodonta kennerlyi
  4. Anodonta nuttalliana
  1. Anodonta oregonensis
  2. Gonidea angulata
  3. Margaritifera falcata
  4. Sinanodonta beringiana

 

 

 
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