MolluscaBase source details
Epiphragmophora fidelis (J. E. Gray, 1834) accepted as Monadenia fidelis (J. E. Gray, 1834) (basis of record)
Epiphragmophora fidelis antecedens Stearns, 1900 † accepted as Monadenia antecedens (Stearns, 1900) † (original description)
Pyramidula perspectiva (Say, 1817) accepted as Discus patulus (Deshayes, 1832) (basis of record)
Pyramidula perspectiva simillima Stearns, 1900 † accepted as Discus simillimus (Stearns, 1900) † (original description)
Oregon for Epiphragmophora fidelis antecedens Stearns, 1900 †
Oregon for Pyramidula perspectiva simillima Stearns, 1900 †
Exact age uncertain. Claimed to be from the "John Day group" (today John Day Formation), which roughly ranges in ... [details]
Exact age uncertain. Claimed to be from the "John Day group" (today John Day Formation), which roughly ranges in ... [details]
Exact age uncertain. Claimed to be from the "John Day group" (today John Day Formation), which roughly ranges in ... [details]
"The North Fork of John Day River, Oregon, at the angle of the big bend, longitude 119° 40', latitude 44° 50" ... [details]
"The North Fork of John Day River, Oregon, at the angle of the big bend, longitude 119° 40', latitude 44° 50" ... [details]
"The North Fork of John Day River, Oregon, at the angle of the big bend, longitude 119° 40', latitude 44° 50" ... [details]
