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namecountiesnativedescriptionpagePilsbry URL
original description URL
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Carychium minimumSan Francisco, Alamedaintroduced8
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Carychium occidentaleDel Norte, Humboldt, Mendocinonative8
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Discus whitneyi
Siskiyou, Modoc, Trinity, Lassen, Plumas, Butte, Yuba, Nevada, El Dorado, Mono, Tuolumne, Mariposa, Fresno, Inyo, Tulare, Kern, San Bernardino
native8
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Discus selenitoidesMariposanative9
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Discus rotundatusSanta Barbara, Ventura, Los Angeles, Orange, San Diegonative9
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Speleodiscoides spirellumEl Dorado, Amador, Calaveras, Marin, Contra Costa, Alamedanative9
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Oreohelix californicaSan Bernardinonative9
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Oreohelix handiSan Bernardinonative
Only as a fossil, maybe extinct
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Radiocentrum avalonenseLos Angelesnative
Santa Catalina Island
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Lucilla singleyanaAlameda, Santa Claraintroduced9
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Ancotrema hybridumDel Norte, Humboldtnative10
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Ancotrema sportellaMendocino, Del Norte, Siskiyou, Humboldtnative10
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Ancotrema sportella sinkyonumMendocinonative10
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Ancotrema sportella sportellaDel Norte, Siskiyou, Humboldtnative10
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Ancotrema voyanumHumboldt, Siskiyou, Trinity, Shastanative10
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Ancotrema voyanum humboldtenseHumboldtnative10
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Ancotrema voyanum voyanumSiskiyou, Trinity, Shastanative10
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Ancotrema zopherumAmadornative10
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Haplotrema minimum
Humboldt, Mendocino, Sonoma, Napa, Marin, Contra Costa, San Francisco, Alameda, San Mateo, Santa Clara, Santa Cruz, Monterey, San Luis Obispo
native10
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Haplotrema vancouverenseDel Norte, Humboldt, Trinitynative11
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Haplotrema species "w"Siskiyounative11
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Haplotrema caelatumSanta Barbara, Ventura, Los Angeles, San Diegonative11
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Haplotrema alameda
Tuolumne, Contra Costa, Alameda, Mariposa, Santa Clara, Tulare, Kern
native11
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Haplotrema catalinenseLos Angelesnative
Santa Catalina Island
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Haplotrema costatumTularenative11
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Haplotrema duranti
Trinity, Mendocino, Lake, Sonoma, Napa, Marin, Contra Costa, San Francisco, Alameda, Santa Clara, Santa Cruz, Monterey, San Luis Obispo, Santa Barbara, Ventura
native11
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Haplotrema duranti continentis
Trinity, Mendocino, Lake, Sonoma, Napa, Marin, Contra Costa, San Francisco, Alameda, Santa Clara, Santa Cruz, Monterey, San Luis Obispo
native11
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Haplotrema duranti durantiSanta Barbara, Venturanative
Channel islands only: Santa Cruz, Santa Barbara, and San Nicolas Islands
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Haplotrema guadalupenseLos Angelesnative
Also on Isla Guadalupe in Mexico
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Haplotrema keepi
Siskiyou, Humboldt, Trinity, Shasta, Plumas, Mendocino, Lake, El Dorado, Contra Costa, Alameda
native12
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Haplotrema mokelumnenseAmador, Calaverasnative12
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Haplotrema transfugaSan DiegonativeAlso in Baja12
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Euglandina roseaRiversideintroduced
Native to the southeastern US
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Cernuella virgataSan Diegointroduced
Native to western Europe and the Mediterranean
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Cochlicella barbaraAlameda, Santa Cruz, San Luis Obispo, San Diegointroduced
Native to the Mediterranean
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Xerotricha conspurcataContra Costa, Santa Claraintroduced
Native to the Mediterranean
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Monadenia circumcarinataTuolumnenative13
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Monadenia mariposaMariposanative
This is a bit of a dubious name, with almost zero usage outside of this publication. The authors cite the type marterial as Monadenia (Corynadenia) hillebrandi mariposa A.G. Smith, 1957, but they do not cite any literature that cites the elevation of that subspecies to species rank. I need to see if the Academy has any of A.G. Smith's papers, and maybe reach out to Dr. Roth.
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Monadenia mormonum
Calaveras, Tuolumne, Mariposa, Fresno, Tehama, Placer, El Dorado, Sacramento, Amador
native13
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Monadenia mormonum buttoniCalaverasnative13
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Monadenia mormonum calaCalaverasnative13
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Monadenia mormonum hillebrandiTuolumnenative13
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Monadenia mormonum hirsutaTuolumnenative13
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Monadenia mormonum subspecies "l"Calaveras, Tuolumnenative13
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Monadenia mormonum loweanaMariposa, Fresnonative13
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Monadenia mormonum mormonumTehama, Placer, El Dorado, Sacramento, Amadornative13
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Monadenia tuolumneanaTuolumnenative13
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Monadenia yosemitensisMariposa, Madera, Fresnonative14
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Monadenia callipeplusSiskiyounative14
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Monadenia chaceanaSiskiyounative14
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Monadenia cristulataSiskiyounative14
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Monadenia fidelisSiskiyou, Del Nortenative14
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Monadenia fidelis flavaSiskiyounative14
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Monadenia fidelis leoninaSiskiyounative14
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Monadenia fidelis pronotisDel Nortenative14
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Monadenia fidelis smithianaDel Nortenative14
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Monadenia infumata
Del Norte, Humboldt, Mendocino, Sonoma, Napa, Marin, Contra Costa, Alameda, Siskiyou, Trinity
native14
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Monadenia infumata callidinaDel Norte, Humboldtnative15
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Monadenia infumata infumata
Humboldt, Mendocino, Sonoma, Napa, Marin, Contra Costa, Alameda
native15
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Monadenia infumata ochromphalusDel Norte, Siskiyou, Humboldtnative15
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Monadenia infumata setosaTrinitynative15
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Monadenia infumata subcarinataHumboldt, Trinitynative15
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Monadenia infumata trinidadensisHumboldtnative15
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Monadenia marmarotisSiskiyou, Trinitynative15
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Monadenia species "m"Del Nortenative15
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Monadenia churchiSiskiyou, Trinity, Shasta, Tehama, Mendocino, Glenn, Lakenative15
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Monadenia troglodytesShastanative15
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Monadenia troglodytes troglodytesShastaextinct
Known from fossil evidence
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Monadenia troglodytes wintuShastanative16
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Sonorelix micrometalleusKernnative
Listed in Roth & Sadeghian as Sonorelix micrometalleus, but seems to be known more broadly as Mohavelix micrometalleus. See http://explorer.natureserve.org/servlet/NatureServe?searchName=Mohavelix+micrometalleus
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Sonorelix avawatzicaSan Bernardinonative16
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Sonorelix baileyiInyonative16
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Sonorelix baileyi baileyiInyonative16
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Sonorelix baileyi eremitaInyonative16
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Sonorelix borregoensisSan Diegonative16
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Sonorelix borregoensis borregoensisSan Diegonative16
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Sonorelix borregoensis oraSan Diegonative16
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Sonorelix harperiSan Diego, Imperialnative16
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Sonorelix harperi carrizoensisImperialnative17
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Sonorelix harperi harperiSan Diego, Imperialnative17
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Sonorelix melanopylonSan Bernardinonative17
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Sonorelix rixfordiSan Bernardino, Riversidenative17
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Micrarionta beatulaLos Angelesnative
Santa Catalina Island
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Micrarionta factaSanta Barbaranative
Santa Barbara Island
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Micrarionta feralisVenturanative
San Nicolas Island
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Micrarionta gabbiiLos Angelesnative
San Clemente Island
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Micrarionta intermediaSanta Barbaranative
Santa Barbara Island
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Micrarionta rufocinctaLos Angelesnative
Santa Catalina Island
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Micrarionta opuntiaVenturanative
San Nicolas Island
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Micrarionta micromphalaVenturaextinct
San Nicolas Island, known only from fossil evidence
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Micrarionta sodalisVenturaextinct
San Nicolas Island, known only from fossil evidence
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Chamaearionta aquaealbaeRiversidenative18
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Herpeteros angelusLos Angelesnative18
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Xerarionta stearnsianaSan Diegonative18
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Xerarionta tryoniSanta Barbara, Venturanative
Santa Barbara and San Nicolas Islands
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Xerarionta tryoni tryoniSanta Barbara, Venturanative
Santa Barbara and San Nicolas Islands
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Xerarionta tryoni hemphilliSanta Barbara, Venturaextinct
Santa Barbara and San Nicolas Islands
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Xerarionta agnesaeLos Angelesextinct
San Clemente Island. AKA Micrarionta agnesae
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Xerarionta intercisaLos Angelesnative
San Clemente Island
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