The Gila topminnow or charalito is a species of fish in the family Poeciliidae. It is found in Mexico and the United States.
Aglaodiaptomus is a genus of copepods in the family Diaptomidae. They are often bright red or blue due to carotenoid pigments.
Arctodiaptomus kamtschaticus is a species of crustacean in the family Diaptomidae. It is endemic to lakes in Kamchatka, eastern Russia, and is listed as a vulnerable species on the IUCN Red List.
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 to 10 centimetres (4 in), and Branchinecta brushi lives at the highest altitude of any crustacean, at 5,930 metres (19,460 ft), a record it shares with the copepod Boeckella palustris. A new genus, Archaebranchinecta was established in 2011 for two species previously placed in Branchinecta.
Branchinella is a genus of crustaceans in the family Thamnocephalidae. This fairy shrimp genus is found across many parts of the world, but especially western Australia and southern Africa.
Branchinella apophysata is a species of crustacean in the family Thamnocephalidae. It is endemic to Australia, where it is known only from its type locality, a shallow pool on Mount Margaret, near Laverton, Western Australia. It is most closely related to other Australian species, including B. affinis, B. denticulata, B. latzi, B. longirostris and B. probiscida.
Branchinella basispina is a species of crustacean in the family Thamnocephalidae. It is endemic to Australia.
Branchinella denticulata is a species of crustacean in the family Thamnocephalidae. It is endemic to Australia.
Branchinella lithaca, the Stone Mountain fairy shrimp, is a species of crustacean in the family Thamnocephalidae. It was collected on Stone Mountain, De Kalb County, Georgia in 1940, and has not been seen since. It is listed as Critically Endangered on the IUCN Red List.
Branchinella simplex is a species of crustacean in the family Thamnocephalidae. It is endemic to Australia.
Branchinella wellardi is a species of crustacean in the family Thamnocephalidae. It is endemic to Australia.
Dexteria floridana is an extinct species of fairy shrimp in the family Chirocephalidae, the only species in the genus Dexteria. It was endemic to Florida, where it was known from a single pool, south of Gainesville. It was originally described by Ralph W. Dexter in 1953 as a species of Eubranchipus. The species was declared extinct on October 5, 2011 because it was found that the only known pool of water that contained the known population was filled in for development, thereby killing the shrimps.
Hesperodiaptomus is a genus of copepods in the family Diaptomidae, containing 18 species. Two species – Hesperodiaptomus augustaensis and Hesperodiaptomus californiensis – are endemic to the United States and listed as vulnerable species on the IUCN Red List.
Mastigodiaptomus is a genus of Neotropical copepods in the family Diaptomidae. Two of the eight species in the genus are listed as Data Deficient (DD) on the IUCN Red List, and one is listed as a vulnerable species (VU):
Mexistenasellus is a genus of isopod crustaceans in the family Stenasellidae.
Sphaerolana is a genus of isopod crustaceans in the family Cirolanidae, all of which are endemic to Mexico.
Stygobromus is a genus of amphipod crustaceans that live in subterranean habitats. The majority of the listed species are endemic to North America, a smaller number of species are also known from Eurasia. Most of the North American species live in areas which were not covered by the Laurentide Ice Sheet, although a few species seem to have survived under the ice. A number of species are on the IUCN Red List as endangered species (EN) or vulnerable species (VU); one species, S. lucifugus, is extinct.
Thermosphaeroma is a genus of crustacean in family Sphaeromatidae. They occur exclusively in hot springs of southwestern United States and central Mexico.
Procambarus lucifugus lucifugus, known as the Withlocoochee light-fleeing cave crayfish, is one of two subspecies of the vampire crayfish, along with Procambarus lucifugus alachua. It is distinct from P. l. alachua due its lack of eyespots. Intergrades of the two P. lucifugus subspecies, P. l. alachua as well as P. erythrops and P. leitheuseri have been found to have little genetic differentiation, especially when compared to P. l. lucifugus which is distinct from all of those. It has been suggested that P. l. lucifugus may prove to be a different species, found only in two freshwater caves, the location of one of which is unknown.
Procambarus lucifugus alachua, known as the Alachua light-fleeing cave crayfish, is one of two subspecies of the vampire crayfish, along with Procambarus lucifugus lucifugus. It is distinct from P. l. lucifugus due its eyespots.
