What do these ranks mean? ORBIC's ranking definitions

Yuma Skipper

Yuma Skipper

Ochlodes yuma

List 2S2
Johnson's Hairstreak

Johnson's Hairstreak

Callophrys johnsoni

List 2S2S3
Winged Floater

Winged Floater

Anodonta nuttalliana

List 3S2?
Oregon Floater

Oregon Floater

Anodonta oregonensis

List 2S3?
Western Ridged Mussel

Western Ridged Mussel

Gonidea angulata

List 1S2S3
Western Pearlshell

Western Pearlshell

Margaritifera falcata

List 2S3

Shortface Lanx

Fisherola nuttalli

List 1S1S2

Banded Juga

Juga newberryi

List 1S1

Sullivan's Sulphur

Colias occidentalis sullivani

List 1S2
Suckley's Cuckoo Bumblebee

Suckley's Cuckoo Bumblebee

Bombus suckleyi

List 2S1?
Morrison Bumblebee

Morrison Bumblebee

Bombus morrisoni

List 2S2
Western Monarch

Western Monarch

Danaus plexippus pop. 1

List 1S1S2B
Western Bumblebee

Western Bumblebee

Bombus occidentalis

List 2S2
Columbia Pebblesnail

Columbia Pebblesnail

Fluminicola fuscus

List 2S2
California Floater

California Floater

Anodonta californiensis

List 3S2
Silver-Bordered Fritillary

Silver-Bordered Fritillary

Boloria myrina

List 2S2

Oregon Giant Earthworm

Driloleirus macelfreshi

List 1S1S2

Oregon Fairy Shrimp

Eubranchipus oregonus

List 2S2

San Francisco Brine Shrimp

Artemia franciscana

List 2S1

Vernal Pool Fairy Shrimp

Branchinecta lynchi

List 1S2S3

Horned Fairy Shrimp

Branchinecta cornigera

List 1S2

Malheur Isopod

Amerigoniscus malheurensis

List 1S1

Malheur Cave Amphipod

Stygobromus hubbsi

List 1S1S2

Oregon Cave Amphipod

Stygobromus oregonensis

List 1S1S2
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