The Amargosa tryonia is located in an intermittent waterway how many miles long?
Amargosa tryonia: The Amargosa tryonia, scientific name Tryonia variegata, is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. Amargosa tryonia:  The common name refers to the Amargosa River.
i don't know