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Hold down the Ctrl or Shift keys to make multiple selections.  Display records per page Indicate if online images are available       Choose search criteria   Family: (list all) Agriolimacidae Ancylidae Arionidae Bithyniidae Bradybaenidae Calyptraeidae Carychiidae Cerionidae Cionellidae Columbellidae Corbiculidae Discidae Ellobiidae Euconulidae Fasciolariidae Ferrussaciidae Fissurellidae Gastrocoptidae Gastrodontidae Haplotrematidae Helicellidae Helicidae Helicinidae Helicodiscidae Hydrobiidae Ischnochitonidae Littorinidae Lymnaeidae Margaritiferidae Melongenidae Mopaliidae Muricidae Mytilidae Neritidae Orthalicidae Philomycidae Physidae Planorbidae Pleuroceridae Polygyridae polyplacophora Pomatiopsidae Punctidae Pupillidae Sphaeriidae Spiraxidae Strobilopsidae Subulinidae Succineidae Tellinidae Truncatellinidae Unionidae Valloniidae Valvatidae Veneridae Vertiginidae Vitrinidae Viviparidae Zonitidae Genus: (list all) Actinonaias Alasmidonta Allogona Amblema Amnicola Anguispira Anodonta Anodontoides Appalachina Arcidens Arion Ashmunella Beringiana Bithynia Bradybaena Busycon Campeloma Carychium Catinella Cecilioides Cepaea Cerion Chicoreus Cochlicella Cochlicopa Columbella Columella Corbicula Crepidula Cryptomastix Cyclonaias Cyprogenia Cyrtonaias Daedalochila Deroceras Discus Dosinia Dromus Elimia Ellipsaria Elliptio Epioblasma Euchemotrema Euconulus Euglandina Fasciolaria Ferrissia Fissurella Fumonelix Fusconaia Galba Gastrocopta Gastrodonta Glyphyalinia Gonidea Guppya Hamiota Haplotrema Hawaiia Helicodiscus Helix Hemistena Inflectarius Lamellaxis Lampsilis Lasmigona Leptodea Leptoxis Lexingtonia Ligumia Liguus Linisa Lithasia Littorina Lobosculum Lymnaea Margaritifera Medionidus Megalonaias Melampus Melongena Mesodon Mesomphix Millerelix Mopalia Mytilus Neohelix Nephronaias Nerita Neritina Nesovitrea Nodilittorina Novisuccinea Obliquaria Obovaria Oligyra Oxychilus Paravitrea Patera Pegias Philomycus Physella Planorbella Plectomerus Plethobasus Pleurobema Pleurocera Polygyra Pomatiopsis Potamilus Praticolella Pseudosuccinea Ptychobranchus Punctum Pupilla Pupoides Pyganodon Quadrula Quincuncina Rumina Simpsonaias Sphaerium Stenotrema Striatura Strobilops Strophitus Subulina Succinea Tellina Theba Tonicella Toxolasma Trilobopsis Triodopsis Tritogonia Truncilla Unio Uniomerus Utterbackia Vallonia Valvata Ventridens Venustaconcha Vertigo Vespericola Villosa Webbhelix Xolotrema Zonitoides Species: (list all) abbreviata aberti abrupta acerra acicula acuta acutissimus aenea aeneus affinis ahenea aheneus alabamensis alatus albilabris albolabris alleni alternata altilis altispira altivagus altum ambigua amygdala andrewsae angulata apiculata appressa approximans arboreus arca arcaeformis arcellus arctata arkansasensis armifera ashmuni askewi asperata aspersa aurea auriculata auriformis avara barbadensis barbara barbatum barbigerum barnesiana beadleianum beringiana berlandieriana bidentatus biemarginata binneyana binominata blandi blandianum bollesiana boykiniana bracteata brevidens brevipila brittsi buckleyi burchi burkei canaliculata capax capsaeformis capsella cardium carica carinata cariosa carnegiei carolinensis caroliniana carolinianus caroliniense cataracta catskillensis cellarius cereolus cerina cerinoideus chattanoogaensis chersinus chilhoweensis chiricahuana christyi cicatricosus ciliata clappi clarki clausus clava cochisensis coelaxis coffeus cohuttense collina collisella columbianus columella complanata compressa concavum confragosus congaraea connasaugaensis conradicus constricta contracta cooperianus cor cordatum corona corticaria corvunculus costata couperiana crassidens cristata cryptomphala cuneolus cupreus cylindrellus cylindrica cylindrical cyphyus dalliana danielsi dariensis deceptum decisum decollata decorata deltoidea demissus denotatum dentifera depilatum devia dilatata discoidea discus divesta dolabelloides dolabraeformis dombeyanus donaciformis dorfeuilliana downiei dromas ebena edgarianum edulis edvardsi electrina elevatus elliotti elliottii ellipsiformis elongatulus esuritor excentrica exigua exiguum exile exodon fabalis fabilis fabula fallax fasciatus fasciola fasciolaris fatigiata ferrea ferrissi ferussacianus fisheriana flava flexuosa florentina fluminea fornicata fosteri fragilis fragosa fraterna fraternum fraudulenta fulvus georgianum germana gibberum gibbosa gouldi grandis greeni griseola gularis gundlachi gyrina hagleri haysiana hebetata hendersoni heterodon heterostropha hippocrepis hirsutum holstonia holzingeri hopetonensis hortensis hydiana icterina imbecillis imbecillus implicata incanum indentata indianorum inflatus inflectus infucata inornatus integra interna intertextus iris jacksoni jacksoniana jayensis jejuna johannis juxtidens kennerlyi kochi labrosum labyrinthicus lacteodens laeve lananensis lanceolata lapidaria lasmodon lata lateumbilicatus lawae leai lenior leporina leptodon levettei lewisii lienosa ligamentina ligera lignosa limatulus limatutus limosa lineata lineolata littorea livescens lividus loricata lubrica magazinensis magnifumosum major margaritifera marginata maxillatum mearnsii mercatoria meridionalis messana metanevra metastriata micra milium minuscula minutissimum mitchellianus mobiliana modicella modicus mogollonensis mooreana mullani mulliani multidentata multilineata muscorum muscosa nasuta nebulosa neglecta neisleri nemoralis nervosa nitidus normalis obovata obrussa obsoleta obstrictum occidentalis octona ohioensis olivaria orbiculata ornata ovalis ovata oviforme panselenus parallelus parva patulus paulus pectorosa pellucida peloronta penicillatus pennsylvanica pentodon perigrapta perlaevis perspectiva picea picta pilosus pilsbryana pilsbryi pilula pinicola pisana platysayoides plenum plicata polygyratus pomum postelliana praerosa procera producta profunda proxima ptychophora pugetensis pulchella purpurata purpuratus pustula pustuloides pustulosa pygmaea quadridens quadrula radiata radiatus raveneli raveneliana recta reeviana reflexa reticulatum retusa rhoadsi rhyssa riograndensis rivularis roemeri rosea rotundatus rubrum rugeli rugosa ruidosensis rumphiana rupicola saludensis sargentiana sayana semicarinata septemvolva servilis sierranus siliquoidea similaris similis simplex simpsoni sintoxia smithi soelneri spinosum stagnalis stegaria stenotrema sterkiana sterkii straminea striatinum subfuscus subpalliatus subrostrata subrotunda subtentum subviridis suppressus taeniata tampicoensis tappaniana tennesseensis tentaculata teres tesselata tetralasmus tetrodon texasiana texasianus theloides thomsoniana thyroidus torulosa townsendiana trabalis tricarinata tridentata trimatris triodontoides triquetra trivolvis troostiana truncata tuberculata tulipa uncialis undulata undulatus uvulifera vannostrandi vanuxemensis varicosa ventricosa vermeta verrucosa versicolor vibex villosa virginea virginica viridis volusiae vulgata vultuosa walkeri wetherbyi wheatleyi wheeleri whitneyi zaletus ziczac Country: (list all) Argentina Canada Cuba Dominican Republic Mexico Spain USA Primary Division: (list all) Alabama Alaska Arizona Arkansas Barcelona Cádiz California Camagüey Cienfuegos Colorado Connecticut Cuidad de la Habana Delaware Florida Georgia Gerona Guantánamo Habana Hawaii Idaho Illinois Isla de la Juventud Islas Baleares Kentucky La Habana Madrid Maine Málaga Maryland Matanzas Michigan Minnesota Misiones Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Ontario Oregon Pennsylvania Pinar del Rio Puerto Plata Puerto Rico Quebec Rhode Island Saamaná Samaná San Pedro de Macoris Sevilla South Carolina South Dakota Tarragona Tennessee Texas Utah Vermont Villa Clara Virginia Washington West Virginia Wisconsin Secondary Division: (list all) Adams Co Addison Co Aiken Co Alachua Co Alameda Co Albany Co Albemarle Co Alcona Co Aleutians W Co Alexandria Co Allegany Co Alleghany Co Allegheny Co Amelia Co Amherst Co Anderson Co Apache Co Appling Co Archuleta Co Arenac Co Arlington Co Armstrong Co Aroostook Co Ashland Co Ashtabula Co Atlantic Co Atoka Co Auglaize Co Augusta Co Avery Co Baker Co Baldwin Co Baltimore Co Baracoa Barbour Co Barry Co Barton Co Bartow Co Batabanó Bates Co Bath Co Baxter Co Bay Co Beaufort Co Beaver Co Bedford Co Belmont Co Benson Co Bent Co Benton Co Benzie Co Bergen Co Berkeley Co Berks Co Bernalillo Co Berrien Co Bexar Co Bibb Co Bingham Co Blair Co Bland Co Bledsoe Co Blount Co Bolivar Co Boone Co Borden Co Bosque Co Boulder Co Bowie Co Bradford Co Braxton Co Brazos Co Brevard Co Bristol Co Bronx Co Brooke Co Broome Co Broward Co Brown Co Brunswick Co Bryan Co Buchanan Co Bucks Co Buffalo Co Burke Co Burleigh Co Burlington Co Butler Co Cabell Co Cache Co Caibarien Caibarién Calhoun Co Calloway Co Calvert Co Cambria Co Camden Co Cameron Co Campbell Co Cape May Co Carbon Co Caroline Co Carroll Co Carter Co Carteret Co Cascade Co Cass Co Catawba Co Catoosa Co Catron Co Cattaraugus Co Cayuga Co Center Co Centre Co Chambers Co Champaign Co Charleston Co Charlevoix Co Charlton Co Chatham Co Chattooga Co Chautauqua Co Cheatham Co Cheboygan Co Cherokee Co Cheshire Co Chester Co Chesterfield Co Chilton Co Chittenden Co Choctaw Co Chocteau Co Cibola Co Cienfuegos Mu Clackamas Co Claiborne Co Clallam Co Clarion Co Clark Co Clarke Co Clatsop Co Clay Co Clearfield Co Cleburne Co Clermont Co Clinton Co Cochise Co Coconino Co Coffee Co Colbert Co Cole Co Collier Co Colorado Co Columbia Co Columbiana Co Columbus Co Comal Co Conecuh Co Consolación S Contra Costa Co Cook Co Coosa Co Cortland Co Coryell Co Coshocton Co Covington Co Cowlitz Co Craig Co Craighead Co Craven Co Crawford Co Crittenden Co Cross Co Culpeper Co Cumberland Co Curry Co Custer Co Cuyahoga Co Dade Co Daggett Co Dakota Co Dale Co Dallas Co Dane Co Dauphin Co Davidson Co Dawson Co Decatur Co Defiance Co DeKalb Co Delaware Co DeSoto Co Deuel Co Dickinson Co Dinwiddie Co Doddridge Co Dodge Co Dona Ana Co Donna 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Hardin Co Hardy Co Harris Co Harrison Co Hartford Co Hawkins Co Hays Co Haywood Co Henderson Co Hendry Co Hennepin Co Henrico Co Henry Co Herkimer Co Hernando Co Hickman Co Hidalgo Co Highland Co Highlands Co Hildago Co Hillsborough Co Hinds Co Hocking Co Holmes Co Honolulu Co Horry Co Hot Spring Co Houghton Co Houston Co Hudson Co Humphreys Co Hunterdon Co Huntingdon Co Huron Co Hyde Co Idaho Co Indiana Co Ingham Co Ionia Co Iowa Co Iron Co Isabella Co Jackson Co Jasper Co Jeff Davis Co Jefferson Co Jim Wells Co Johnson Co Juniata Co Kalamazoo Co Kanawha Co Kane Co Kay Co Kendall Co Kennebec Co Kent Co King Co Kingfisher Co Kings Co Kitsap Co Kittitas Co