| Common Name | Scientific Name | Federal Status | State Status | State Rank | Global Rank |
|---|---|---|---|---|---|
| Northern crayfish | Orconectes virilis | ||||
| Golden crayfish | Orconectes luteus | ||||
| Salem cave crayfish | Cambarus hubrichti | S3 | G4 | ||
| Devil crayfish | Cambarus diogenes | ||||
| Grassland crayfish | Procambarus gracilis |
1 Introduced species
Federal Status
E = Endangered
T = Threatened
C = Candidate for listing
* = Formerly listed as C2 (candidate for listing). This category was dropped in 1996.
E = Endangered
NOTE: All other classifications were dropped in 1998.
State Rank
Numerical rank of relative indangerment for the species within the state based on the number of known occurrences.
S1 = Critically imperiled in the state because of extreme rarity or because of some factor(s) making it especiallly vulnerable to extirpation from the state.
S2 = Imperiled in the state because of rarity or because some factor(s) making it very vulnerable to extirpation from the state.
S3 = Rare or uncommon in the state.
S4 = Widespread, abundant, and apparently secure in the state, but of long-term concern.
S5 = Demonstrably widespread, abundant, and secure in the state, and essentially eradicable under present conditions.
S#S# =Indicates range of uncertainty of the exact numerical ranking for the species.
? = denotes ranking which is uncertain.
Global Rank
Numerical ranking of relative endangerment for the species worldwide. The categories are similar to those listed above for State Rank.
