Unionidae

Unionidae ialah keluarga kerang air tawar yang terbesar dalam order Unionida, iaitu moluska dwicangkang yang terkadang dikenali sebagai kijing atau hanya unionid.

Julat taburan keluarga ini ada di seluruh dunia. Ia paling rencam di Amerika Utara, dengan sekitar 297 takson teraku,Burch, John B. 1975. Freshwater unionacean clams (Mollusca: Pelecypoda) of North America. Biota of Freshwater Ecosystems, Identification Manual No. 11. U.S. Gov. Printing Office. 114p.Heard, William H. 1979. Identification Manual of the Freshwater Clams of Florida.  Fla. Dept. Environmental Regulation, Technical Series 4(2): 1-83. tetapi China dan Asia Tenggara juga tidak kalah rencam.

Kerang air tawar ini hidup di habitat taburan yang luas, tetapi paling banyak di perairan lotik, cth. air mengalir seperti sungai, alur dan ceruk.

Taksonomi

 Genus mengikut order taksonomi 
Pengelasan berikut berdasarkan pangkalan data MolluscaBase dan MUSSEL Project:

 Subkeluarga Ambleminae
 Suku Lampsilini 
 Genus Epioblasma
 Genus  Lampsilis
 Genus Potamilus
 Genus Actinonaias
 Genus Cambarunio
 Genus Obovaria
 Genus Toxolasma
 Genus Medionidus
 Genus Ptychobranchus
 Genus Disconaias
 Genus Leaunio
 Genus Venustaconcha
 Genus Cyrtonaias
 Genus Hamiota
 Genus Sagittunio
 Genus Truncilla
 Genus Villosa
 Genus Arotonaias
 Genus Cyprogenia
 Genus Delphinonaias
 Genus Ortmanniana
 Genus Pachynaias
 Genus Atlanticoncha
 Genus Dromus
 Genus Ellipsaria
 Genus Friersonia
 Genus Glebula
 Genus Lemiox
 Genus Ligumia
 Genus Obliquaria
 Genus Paetulunio
 Suku Pleurobemini
 Genus Elliptio
 Genus Pleurobema
 Genus Fusconaia
 Genus Plethobasus
 Genus Pleuronaia
 Genus Parvaspina
 Genus Elliptoideus
 Genus Eurynia
 Genus Hemistena
 Suku Popenaiadini
 Genus Nephronaias
 Genus Psoronaias
 Genus Barynaias
 Genus Popenaias
 Genus Sphenonaias
 Genus Micronaias
 Genus Nephritica
 Genus Reticulatus
 Genus Martensnaias
 Suku Quadrulini
 Genus Cyclonaias
 Genus Theliderma
 Genus Uniomerus
 Genus Quadrula
 Genus Megalonaias
 Genus Tritogonia
 Suku Amblemini
 Genus Amblema
 Genus Reginaia
 Genus Plectomerus
 Subkeluarga Unioninae
 Suku Anodontini
 Subsuku Alasmidontina
 Genus Alasmidonta
 Genus Lasmigona
 Genus Pyganodon
 Genus Utterbackiana
 Genus Strophitus
 Genus Utterbackia
 Genus Anodontoides
 Genus Arcidens
 Genus Pseudodontoideus
 Genus Pegias
 Genus Simpsonaias
 Subsuku Cristariina
 Genus Sinanodonta
 Genus Buldowskia
 Genus Cristaria
 Genus Anemina
 Genus Beringiana
 Genus Pletholophus
 Genus Simpsonella
 Genus Amuranodonta
 Subsuku Anodontina
 Genus Anodonta
 Genus Pseudanodonta
 Suku Unionini
 Genus Unio
 Genus Nodularia
 Genus Aculamprotula
 Genus Acuticosta
 Genus Cuneopsis
 Genus Inversiunio
 Genus Pseudobaphia
 Genus Rhombuniopsis
 Genus Lepidodesma
 Genus Pseudocuneopsis
 Genus Schistodesmus
 Genus Arcuneopsis
 Genus Diaurora
 Genus Middendorffinaia
 Genus Protunio
 Suku Lanceolariini
 Genus Lanceolaria
 Subkeluarga Gonideinae
 Suku Pseudodontini
 Subsuku Pilsbryoconchina
 Genus Sundadontina
 Genus Monodontina
 Genus Pilsbryoconcha
 Genus Bineurus
 Genus Thaiconcha
 Genus Namkongnaia
 Genus Nyeinchanconcha
 Subsuku Pseudodontina
 Genus Pseudodon
 Suku Contradentini
 Genus Lens
 Genus Yaukthwa
 Genus Physunio
 Genus Trapezoideus
 Genus Pressidens
 Genus Solenaia
 Suku Lamprotulini
 Genus Lamprotula
 Genus Potomida
 Genus Schepmania
 Genus Discomya
 Genus Pronodularia
 Suku Rectidentini
 Genus Hyriopsis
 Genus Ensidens
 Genus Ctenodesma
 Genus Elongaria
 Genus Khairuloconcha
 Genus Prohyriopsis
 Genus Rectidens
 Suku Gonideni
 Genus Ptychorhynchus
 Genus Sinosolenaia
 Genus Inversidens
 Genus Leguminaia
 Genus Parvasolenaia
 Genus Gonidea
 Genus Koreosolenaia
 Genus Microcondylaea
 Genus Obovalis
 Genus Pseudodontopsis
 Suku Chamberlainini
 Genus Sinohyriopsis
 Genus Chamberlainia
 Genus Caudiculatus
 Subkeluarga Parreysiinae
 Suku Coelaturini
 Genus Coelatura
 Genus Nitia
 Genus Nyassunio
 Genus Prisodontopsis
 Genus Brazzaea
 Genus Grandidieria
 Genus Moncetia
 Genus Pseudospatha
 Suku Indochinellini
 Genus Indonaia
 Genus Scabies
 Genus Radiatula
 Genus Harmandia
 Genus Indochinella
 Genus Scabiellus
 Genus Unionetta
 Suku Lamellidentini
 Genus Lamellidens
 Genus Trapezidens
 Genus Arcidopsis
 Suku Leoparreysiini
 Genus Leoparreysia
 Suku Parreysiini
 Genus Parreysia
 Genus Balwantia
 Genus Haasodonta (Subkeluarga incertae sedis)
 Genus Germainaia (Subkeluarga incertae sedis)
 Subkeluarga Modellnaiinae
 Genus Modellnaia

 Genus berdasarkan order dan wilayah mengikut abjad 

Tersebar luas
  Anodonta
  Potomida
  Unio
Afrika
  Brazzaea
  Coelatura
  Germainaia
  Grandidieria
  Mweruella
  Nitia
  Nyassunio
  Prisodontopsis
  Pseudospatha
Amerika Tengah
  Arotonaias
  Barynaias
  Cyrtonaias
  Delphinonaias
  Disconaias
  Friersonia
  Martensnaias
  Micronaias
  Nephritica
  Nephronaias
  Pachynaias
  Popenaias
  Psoronaias
  Psorula
  Reticulatus
  Sphenonaias

Asia Timur
  Aculamprotula 
  Acuticosta 
  Anemina 
  Arconaia 
 BineurusC. T. Simpson, 1900
  Caudiculatus 
  Chamberlainia 
  Contradens 
  Cristaria 
  Ctenodesma 
  Cuneopsis 
  Discomya 
  Elongaria 
  Ensidens 
  Harmandia 
  Hyriopsis 
  Inversidens 
  Inversiunio 
  Lamprotula 
  Lanceolaria 
  Lepidodesma 
  Modellnaia 
 Monodontina Conrad, 1853
  Nodularia 
  Oxynaia 
  Physunio 
  Pilsbryoconcha 
  Pressidens 
  Prohyriopsis 
  Pronodularia 
  Protunio 
  Pseudobaphia 
  Pseudodon 
  Ptychorhynchus 
  Rectidens 
  Rhombuniopsis 
  Scabies

  Schepmania 
  Schistodesmus 
  Simpsonella 
  Sinanodonta
 Solenaia
 Sundadontina Bolotov et al., 2020
 Thaiconcha Bolotov et al., 2020
  Unionetta
Eropah
  Microcondylaea
  Pseudanodonta
India
  Arcidopsis
  Lamellidens
  Parreysia
  Radiatula
  Trapezoideus
  Yaukthwa
Timur Tengah
  Leguminaia
  Pseudodontopsis
New Guinea
  Haasodonta
Amerika Utara 
  Actinonaias
  Alasmidonta
  Amblema
  Anodontoides
  Arcidens
  Cyprogenia
  Dromus
  Ellipsaria
  Elliptio

  Elliptoideus
  Epioblasma
  Fusconaia
  Glebula
  Gonidea
  Hamiota
  Hemistena
  Lampsilis
  Lasmigona
  Lemiox
  Leptodea
  Ligumia
  Medionidus
  Megalonaias
  Obliquaria
  Obovaria
  Pegias
  Plectomerus
  Plethobasus
  Pleurobema
  Pleuronaia
  Potamilus
 Psoronaias Crosse & P. Fischer, 1894
  Ptychobranchus
  Pyganodon
  Quadrula
  Reginaia
  Rotundaria
  Simpsonaias
  Strophitus
  Theliderma
  Toxolasma
  Truncilla
  Uniomerus
  Utterbackia
  Venustaconcha
  Villosa

 Rujukan 

Pautan luar

 Missouri State Unio Gallery
 Freshwater Mollusk Conservation Society
 Ohio State University: Division of Molluscs - Freshwater Mussel Collection - Unionidae 
 Unionidae at The MUSSEL Project Web Site