Animalia → Gastropoda → Zonitidae
Northern Tightcoil
Pristiloma arcticum
Invertebrate Animals
ORBIC List 3S1S2
State Rank
SX
S1
S2
S3
S4
S5
S1S2 — Critically Imperiled in Oregon
G3G4
Global Rank
Vulnerable
List 3
ORBIC
Sensitive / Vulnerable
What do these ranks mean? ORBIC's ranking definitions or NatureServe's conservation status categories
Ecoregions
West Cascades
Counties
Linn
Other states / provinces
AK, BC, ID, WA
Range map
Certain
Possible
Extirpated
Absent