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2,243 species in Mammoth Cave National Park
Euphoria inda
Euphoria sepulcralis
Euptoieta claudia
Eurema nicippe
Eurymycter tricarinatus
Eutrochium fistulosum
Fascista cercerisella
Faxonius putnami
Fissidens dubius
Fissidens grandifrons
Flatormenis proxima
Florinda coccinea
Folsomia prima
Fomes graveolens
Formica integra
Forsstroemia trichomitria
Fragaria virginiana
Frullania riparia
Fulvifomes robiniae
Funaria hygrometrica
Fundulus notatus
Fuscopannaria leucosticta
Galba humilis
Galium pilosum
Gambusia affinis
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