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Page last updated
30 March 2018

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 309 species. The families represented are Unionidae and Margaritiferidae.

Nearctica is composed of five subregions. The largest is the Interior Subregion (NA1; 148 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; 55 spp.), which extends from the glaciated portions of eastern Canada and the USA, south to Georgia. The Gulf Subregion (NA3; 148 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 denigratus*
  7. Anodontoides ferussacianus
  8. Arcidens confragosus
  9. Arcidens wheeleri*
  10. Cambarunio dactylus*
  11. Cambarunio hesperus*
  12. Cambarunio iris
  13. Cambarunio jonesii*
  14. Cambarunio simus*
  15. Cambarunio taeniatus*
  16. Cyclonaias nodulata
  17. Cyclonaias pustulosa
  18. Cyclonaias tuberculata*
  19. Cyprogenia aberti*
  20. Cyprogenia stegaria*
  21. Dromus dromas*
  22. Ellipsaria lineolata
  23. Elliptio complanata
  24. Elliptio crassidens
  25. Epioblasma ahlstedti*
  26. Epioblasma arcaeformis*
  27. Epioblasma aureola*
  28. Epioblasma biemarginata*
  29. Epioblasma brevidens*
  30. Epioblasma capsaeformis*
  31. Epioblasma cincinnatiensis*
  32. Epioblasma curtisii*
  33. Epioblasma flexuosa*
  34. Epioblasma florentina*
  35. Epioblasma gubernaculum*
  36. Epioblasma haysiana*
  37. Epioblasma lenior*
  38. Epioblasma lewisii*
  39. Epioblasma obliquata*
  40. Epioblasma perobliqua*
  41. Epioblasma personata*
  42. Epioblasma propinqua*
  43. Epioblasma rangiana*
  44. Epioblasma sampsonii*
  45. Epioblasma stewardsonii*
  46. Epioblasma torulosa*
  47. Epioblasma triquetra*
  48. Epioblasma turgidula*
  49. Epioblasma walkeri*
  50. Eurynia dilatata*
  51. Fusconaia cor*
  52. Fusconaia cuneolus*
  53. Fusconaia flava
  54. Fusconaia ozarkensis*
  55. Fusconaia subrotunda*
  56. Hemistena lata*
  57. Lampsilis abrupta*
  58. Lampsilis brittsi*
  59. Lampsilis cardium*
  60. Lampsilis fasciola*
  61. Lampsilis higginsii*
  62. Lampsilis hydiana
  63. Lampsilis ovata*
  64. Lampsilis powellii*
  65. Lampsilis rafinesqueana*
  66. Lampsilis reeveiana*
  67. Lampsilis satura
  68. Lampsilis siliquoidea*
  69. Lampsilis streckeri*
  70. Lampsilis teres
  71. Lampsilis virescens*
  72. Lasmigona complanata
  73. Lasmigona compressa
  74. Lasmigona costata
  1. Lasmigona holstonia*
  2. Lasmigona subviridis
  3. Leaunio lienosus
  4. Leaunio ortmanni*
  5. Leaunio pataecus*
  6. Leaunio umbrans
  7. Leaunio vanuxemensis*
  8. Lemiox rimosus*
  9. Leptodea fragilis
  10. Leptodea leptodon*
  11. Ligumia recta
  12. Margaritifera falcata
  13. Margaritifera monodonta*
  14. Medionidus conradicus*
  15. Megalonaias nervosa
  16. Obliquaria reflexa
  17. Obovaria arkansasensis
  18. Obovaria olivaria*
  19. Obovaria retusa*
  20. Obovaria subrotunda*
  21. Ortmanniana ligamentina*
  22. Ortmanniana pectorosa*
  23. Paetulunio fabalis*
  24. Pegias fabula*
  25. Plectomerus dombeyanus
  26. Plethobasus cicatricosus*
  27. Plethobasus cooperianus*
  28. Plethobasus cyphyus*
  29. Pleurobema clava*
  30. Pleurobema cordatum*
  31. Pleurobema oviforme*
  32. Pleurobema plenum*
  33. Pleurobema rubrum*
  34. Pleurobema sintoxia*
  35. Pleuronaia barnesiana*
  36. Pleuronaia dolabelloides*
  37. Pleuronaia gibber*
  38. Potamilus alatus
  39. Potamilus capax*
  40. Potamilus ohiensis
  41. Potamilus purpuratus
  42. Ptychobranchus fasciolaris*
  43. Ptychobranchus occidentalis*
  44. Ptychobranchus subtentus*
  45. Pyganodon grandis
  46. Pyganodon lacustris
  47. Quadrula apiculata
  48. Quadrula fragosa*
  49. Quadrula nobilis
  50. Quadrula quadrula
  51. Reginaia ebena
  52. Sagittunio nasutus
  53. Sagittunio subrostrata
  54. Simpsonaias ambigua*
  55. Strophitus undulatus
  56. Theliderma cylindrica*
  57. Theliderma intermedia*
  58. Theliderma metanevra
  59. Theliderma sparsa*
  60. Toxolasma cylindrellus*
  61. Toxolasma lividum*
  62. Toxolasma parvum
  63. Toxolasma texasiense
  64. Tritogonia verrucosa
  65. Truncilla donaciformis
  66. Truncilla truncata
  67. Uniomerus tetralasmus
  68. Utterbackia imbecillis
  69. Utterbackiana suborbiculata
  70. Venustaconcha ellipsiformis*
  71. Venustaconcha pleasii*
  72. Venustaconcha trabalis*
  73. Venustaconcha troostensis*
  74. Villosa vibex
Atlantic Subregion (NA2)
 
  1. Alasmidonta arcula*
  2. Alasmidonta heterodon*
  3. Alasmidonta marginata
  4. Alasmidonta robusta*
  5. Alasmidonta undulata*
  6. Alasmidonta varicosa*
  7. Anodontoides ferussacianus
  8. Cambarunio iris
  9. Elliptio angustata*
  10. Elliptio arctata
  11. Elliptio cistellaeformis*
  12. Elliptio complanata
  13. Elliptio congaraea*
  14. Elliptio dariensis
  15. Elliptio downiei*
  16. Elliptio fisheriana*
  17. Elliptio folliculata*
  18. Elliptio fraterna
  19. Elliptio hopetonensis*
  20. Elliptio icterina*
  21. Elliptio lanceolata
  22. Elliptio marsupiobesa*
  23. Elliptio producta*
  24. Elliptio roanokensis*
  25. Elliptio shepardiana*
  26. Elliptio spinosa*
  27. Fusconaia masoni*
  28. Lampsilis cariosa*
  1. Lampsilis dolabraeformis*
  2. Lampsilis radiata*
  3. Lampsilis splendida*
  4. Lasmigona compressa
  5. Lasmigona costata
  6. Lasmigona decorata*
  7. Lasmigona subviridis
  8. Leptodea ochracea*
  9. Margaritifera margaritifera
  10. Parvaspina collina*
  11. Parvaspina steinstansana*
  12. Pyganodon cataracta
  13. Pyganodon fragilis*
  14. Pyganodon gibbosa*
  15. Pyganodon lacustris
  16. Sagittunio aldermani*
  17. Sagittunio nasutus
  18. Sagittunio vaughanianus*
  19. Sinanodonta woodiana
  20. Strophitus undulatus
  21. Toxolasma pullus*
  22. Uniomerus caroliniana
  23. Utterbackiana couperiana
  24. Utterbackiana implicata*
  25. Venustaconcha constricta*
  26. Villosa delumbis*
  27. Villosa vibex
Gulf Subregion (NA3)
 
  1. Alasmidonta mccordi*
  2. Alasmidonta triangulata*
  3. Alasmidonta wrightiana*
  4. Amblema elliottii*
  5. Amblema neislerii*
  6. Amblema plicata
  7. Arcidens confragosus
  8. Cambarunio nebulosa*
  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 nodulata
  18. Cyclonaias petrina*
  19. Cyclonaias pustulosa
  20. Cyclonaias refulgens*
  21. Cyclonaias succissa*
  22. Cyrtonaias saladoensis*
  23. Cyrtonaias tampicoensis
  24. Disconaias conchos*
  25. Disconaias fimbriata
  26. Ellipsaria lineolata
  27. Elliptio arca*
  28. Elliptio arctata
  29. Elliptio chipolaensis*
  30. Elliptio crassidens
  31. Elliptio fraterna
  32. Elliptio fumata*
  33. Elliptio jayensis
  34. Elliptio lanceolata
  35. Elliptio mcmichaeli*
  36. Elliptio nigella*
  37. Elliptio pullata*
  38. Elliptio purpurella*
  39. Elliptoideus sloatianus*
  40. Epioblasma metastriata*
  41. Epioblasma othcaloogensis*
  42. Epioblasma penita*
  43. Fusconaia burkei*
  44. Fusconaia cerina*
  45. Fusconaia chunii*
  46. Fusconaia escambia*
  47. Fusconaia flava
  48. Fusconaia mitchelli*
  49. Glebula rotundata*
  50. Hamiota altilis*
  51. Hamiota australis*
  52. Hamiota perovalis*
  53. Hamiota subangulata*
  54. Lampsilis binominata*
  55. Lampsilis bracteata*
  56. Lampsilis floridensis
  57. Lampsilis hydiana
  58. Lampsilis ornata*
  59. Lampsilis satura
  60. Lampsilis straminea*
  61. Lampsilis teres
  62. Lasmigona alabamensis*
  63. Lasmigona complanata
  64. Lasmigona etowaensis*
  65. Lasmigona subviridis
  66. Leaunio lienosus
  67. Leaunio umbrans
  68. Leptodea fragilis
  69. Ligumia recta
  70. Margaritifera hembeli*
  71. Margaritifera marrianae*
  72. Medionidus acutissimus*
  73. Medionidus parvulus*
  74. Medionidus penicillatus*
  1. Medionidus simpsonianus*
  2. Medionidus walkeri*
  3. Megalonaias nervosa
  4. Obliquaria reflexa
  5. Obovaria arkansasensis
  6. Obovaria choctawensis*
  7. Obovaria haddletoni*
  8. Obovaria unicolor*
  9. Plectomerus dombeyanus
  10. Pleurobema athearni*
  11. Pleurobema beadleianum*
  12. Pleurobema curtum*
  13. Pleurobema decisum*
  14. Pleurobema fibuloides*
  15. Pleurobema georgianum*
  16. Pleurobema hanleyianum*
  17. Pleurobema hartmanianum*
  18. Pleurobema marshalli*
  19. Pleurobema perovatum*
  20. Pleurobema pyriforme*
  21. Pleurobema riddellii*
  22. Pleurobema rubellum*
  23. Pleurobema stabile*
  24. Pleurobema strodeanum*
  25. Pleurobema taitianum*
  26. Pleurobema verum*
  27. Popenaias popeii
  28. Potamilus amphichaenus*
  29. Potamilus inflatus*
  30. Potamilus metnecktayi*
  31. Potamilus ohiensis
  32. Potamilus purpuratus
  33. Pseudodontoideus connasaugaensis*
  34. Pseudodontoideus subvexus*
  35. Ptychobranchus foremanianus*
  36. Ptychobranchus greenii*
  37. Ptychobranchus jonesi*
  38. Pyganodon cataracta
  39. Pyganodon grandis
  40. Quadrula apiculata
  41. Quadrula couchiana*
  42. Quadrula nobilis
  43. Quadrula quadrula
  44. Quadrula rumphiana*
  45. Reginaia apalachicola*
  46. Reginaia ebena
  47. Reginaia rotulata*
  48. Sagittunio subrostrata
  49. Sphenonaias taumilapana*
  50. Strophitus pascagoulaensis*
  51. Strophitus radiatus*
  52. Strophitus undulatus
  53. Strophitus williamsi*
  54. Theliderma metanevra
  55. Theliderma stapes*
  56. Toxolasma corvunculus*
  57. Toxolasma parvum
  58. Toxolasma paulum
  59. Toxolasma texasiense
  60. Tritogonia verrucosa
  61. Truncilla cognata*
  62. Truncilla donaciformis
  63. Truncilla macrodon*
  64. Truncilla truncata
  65. Uniomerus columbensis*
  66. Uniomerus declivis*
  67. Uniomerus tetralasmus
  68. Utterbackia imbecillis
  69. Utterbackia peggyae*
  70. Utterbackiana hartfieldorum*
  71. Utterbackiana heardi*
  72. Utterbackiana suborbiculata
  73. Villosa vibex
  74. 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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