The graceful splayfoot salamander, also known as the graceful flat-footed salamander, is a species of salamander in the family Plethodontidae. It is endemic to the Tamaulipas state in northeastern Mexico. Its type locality is near Gómez Farías, Tamaulipas.
Ceylonthelphusa durrelli is a species of decapod in the family Gecarcinucidae. It is native to Central Province, Sri Lanka.
Ceylonthelphusa kotagama is a species of decapod in the family Gecarcinucidae.
Ceylonthelphusa nata is a species of decapod in the family Gecarcinucidae.
Hobbseus valleculus, the Choctaw riverlet crayfish, is a species of crayfish in the family Cambaridae. It is found in North America.
Perbrinckia is a genus of freshwater crabs of the family Gecarcinucidae that is endemic to Sri Lanka, named after Per Brinck. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical swamps, and rivers. It contains 14 species, most of which are included on the IUCN Red List as critically endangered species (CR) or vulnerable species (VU) because they are threatened by habitat loss; only one species is of least concern (LC).
Perbrinckia enodis is a species of decapod in the family Gecarcinucidae.
Perbrinckia fido is a species of decapod in the family Gecarcinucidae.
Perbrinckia morayensis is a species of decapod in the family Gecarcinucidae.
Perbrinckia punctata is a species of decapod in the family Gecarcinucidae.
Perbrinckia quadratus is a species of decapod in the family Gecarcinucidae.
Perbrinckia rosae is a species of decapod in the family Gecarcinucidae.
Spiralothelphusa fernandoi is a species of decapod in the family Gecarcinucidae.
Spiralothelphusa parvula is a species of decapod in the family Gecarcinucidae.
Typhlatya iliffei is a species of basket shrimp in the family Atyidae. It is found in the Caribbean.
Typhlatya monae is a species of basket shrimp in the family Atyidae. It is found in the Caribbean and Africa.
Perbrinckia glabra is a species of freshwater crab of the family Gecarcinucidae that is endemic to Sri Lanka. The species is categorized as critically endangered by the IUCN Red List due to their single locality in Horton Plains National Park. Perbrinckia glabra is found primarily under rocks and boulders near shallow streams. Major threats to this species include habitat loss and pollution.
