''Archaebranchinecta barstowensis'' is a species of fairy shrimp ( Anostraca) that inhabited California during the

Middle Miocene The Middle Miocene is a sub-epoch of the Miocene Epoch made up of two stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene. The sub-epoch lasted from 15.97 ± 0.05 Ma to 11.608 ± 0.005 Ma (million y ...

(). Its fecal material is abundant in the concretions from the Barstow Formation. A limited number of whole specimens have been found, and they represent the "best-preserved fossil anostracan known to date". The closest relative of ''A. barstowensis'' appears to be '' Archaebranchinecta pollicifera'' from the surroundings of Lake Titicaca, and the two have been separated from the genus ''

Branchinecta ''Branchinecta'' is a genus of crustacean in family Branchinectidae. It includes around 50 species, found on all continents except Australia. ''Branchinecta gigas'', the giant fairy shrimp, is the largest species in the order, with a length of up ...

'' as the new genus '' Archaebranchinecta''.

References

Anostraca Miocene crustaceans Miocene animals of North America Prehistoric arthropods of North America Fauna of the Mojave Desert Miocene California Fossil taxa described in 2001 Crustaceans described in 2001 {{Branchiopoda-stub