''Tenuibranchiurus'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

of diminutive

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include non-salty mi ...

crayfish Crayfish are freshwater crustaceans belonging to the infraorder Astacidea, which also contains lobsters. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. Some spe ...

that live in the

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

n state of

Queensland Queensland ( , commonly abbreviated as Qld) is a States and territories of Australia, state in northeastern Australia, and is the second-largest and third-most populous state in Australia. It is bordered by the Northern Territory, South Austr ...

. Only one species has been described, the swamp crayfish, ''T. glypticus''. ''Tenuibranchiurus glypticus'' is reportedly the smallest species of crayfish in the world. It is distinguished from other crayfish by its small size, adults being only around long, and its

claw A claw is a curved, pointed appendage found at the end of a toe or finger in most amniotes (mammals, reptiles, birds). Some invertebrates such as beetles and spiders have somewhat similar fine, hooked structures at the end of the leg or Arthro ...

s which open vertically rather than horizontally or obliquely. ''Tenuibranchiurus'' lives in coastal

wallum Wallum, also known as the Wallum Sand Heaths or Wallum Country, is an Australian ecosystem of coastal south-eastern Queensland, extending into north-eastern New South Wales. It is characterised by flora-rich shrubland and heathland on deep, ...

swamps, and stays among the

sedges The Cyperaceae () are a family of graminoid (grass-like), monocotyledonous flowering plants known as sedges. The family is large; botanists have described some 5,500 known species in about 90 generathe largest being the "true sedges" (genu ...

rather than in more open water. Its habitat is highly fragmented, as land is used for the expansion of

Brisbane Brisbane ( ; ) is the List of Australian capital cities, capital and largest city of the States and territories of Australia, state of Queensland and the list of cities in Australia by population, third-most populous city in Australia, with a ...

and the

Sunshine Coast Sunshine Coast may refer to: * Sunshine Coast, Queensland, Australia **Sunshine Coast Region, a local government area of Queensland named after the region **Sunshine Coast Stadium * Sunshine Coast (British Columbia), geographic subregion of the Br ...

, and ''Tenuibranchiurus glypticus'' is therefore listed as an

endangered species An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching, inv ...

on the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is an inventory of the global conservation status and extinction risk of biological ...

. Additional populations have been found at the periphery of its range, but these are thought to represent new,

undescribed species In taxonomy, an undescribed taxon is a taxon (for example, a species) that has been discovered, but not yet formally described and named. The various Nomenclature Codes specify the requirements for a new taxon to be validly described and named. U ...

References

{{Taxonbar, from=Q2707630 Parastacidae Freshwater crustaceans of Australia Monotypic decapod genera

See also

References