The species lists below include the Invertebrates in California broken down by protected status. Species with multiple designations are listed more than once, and will appear in each category that is suitable. However, species with multiple designations will have a “-” after the latin name and a series of letters that describes all of the designations. The “key” is as follows:

FE = Federal Endangered          FT = Federal Threatened

SE = State Endangered              ST = State Threatened

Federal Listed Invertebrates

There are a total of 34 federal listed invertebrates in California.

• Click here to learn more about the Federal Endangered Species Act

Federal Endangered Invertebrates (28 species)

• Morro shoulderband snail (Helminthoglypta walkeriana)
• White abalone (Haliotis sorenseni)
• Black abalone (Haliotis cracherodii)
• Riverside fairy shrimp (Streptocephalus woottoni)
• Conservancy fairy shrimp (Branchinecta conservatio)
• Longhorn fairy shrimp (Branchinecta longiantenna)
• San Diego fairy shrimp (Branchinecta sandiegonensis)
• Vernal pool tadpole shrimp (Lepidurus packardi)
• Shasta crayfish (Pacifastacus fortis) – FE, SE
• California freshwater shrimp (Syncaris pacifica) – FE, SE
• Zayante band-winged grasshopper (Trimerotropis infantilis)
• Mount Hermon June beetle (Polyphylla barbata)
• Casey’s June beetle (Dinacoma caseyi)
• Ohlone tiger beetle (Cicindela ohlone)
• Mission blue butterfly (Plebejus icarioides missionensis)
• Lotis blue butterfly (Plebejus anna lotis)
• Palos Verdes blue butterfly (Glaucopsyche lygdamus palosverdesensis)
• Segundo blue butterfly (Euphilotes battoides allyni)
• Smith’s blue butterfly (Euphilotes enoptes smithi)
• San Bruno elfin butterfly (Callophrys mossii bayensis)
• Lange’s metalmark butterfly (Apodemia mormo langei)
• Quino checkerspot butterfly (Euphydryas editha quino) (=E. e. wrighti)
• Carson wandering skipper (Pseudocopaeodes eunus obscurus)
• Laguna Mountains skipper (Pyrgus ruralis lagunae)
• Callippe silverspot butterfly (Speyeria callippe callippe)
• Behren’s silverspot butterfly (Speyeria zerene behrensii)
• Myrtle’s silverspot butterfly (Speyeria zerene myrtleae)
• Delhi Sands flower-loving fly (Rhaphiomidas terminatus abdominalis)

Federal Threatened Invertebrates (6 species)

• Vernal pool fairy shrimp (Branchinecta lynchi)
• Delta green ground beetle (Elaphrus viridis)
• Valley elderberry longhorn beetle (Desmocerus californicus dimorphus)
• Kern primrose sphinx moth (Euproserpinus euterpe)
• Bay checkerspot butterfly (Euphydryas editha bayensis)
• Oregon silverspot butterfly (Speyeria zerene hippolyta)

State Listed Invertebrates

There are a total of 3 state listed invertebrates in California. Two of them are also federal listed species.

• Click here to learn more about the California Endangered Species Act

State Endangered Invertebrates (2 species)

• Shasta crayfish (Pacifastacus fortis) – FE, SE
• California freshwater shrimp (Syncaris pacifica) – FE, SE

State Threatened Invertebrates (1 species)

• Trinity bristle snail (Monadenia infumata setosa)