''Gramastacus'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does in ...

crayfish Crayfish are freshwater crustaceans belonging to the clade Astacidea, which also contains lobsters. In some locations, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, rock lobsters, ...

species from southeast Australia. It has two described species.

Discovery

Two species of ''Gramastacus'' were originally described in 1972 by

Edgar Riek Edgar Frederick Riek (1920–2016) was an Australian entomologist and invertebrate zoologist known for his research on fossil insects and the taxonomy of freshwater crayfish. He later became known as prominent viticulturist and winemaker. Affi ...

from the

Grampian region Grampian ( gd, Roinn a' Mhonaidh) was one of nine former local government regions of Scotland created in 1975 by the Local Government (Scotland) Act 1973 and abolished in 1996 by the Local Government etc. (Scotland) Act 1994. The region ...

of western

Victoria Victoria most commonly refers to: * Victoria (Australia), a state of the Commonwealth of Australia * Victoria, British Columbia, provincial capital of British Columbia, Canada * Victoria (mythology), Roman goddess of Victory * Victoria, Seychelle ...

, Australia: ''

Gramastacus insolitus ''Gramastacus'' is a genus of freshwater crayfish species from southeast Australia. It has two described species. Discovery Two species of ''Gramastacus'' were originally described in 1972 by Edgar Riek from the Grampian region of western Vic ...

'' and ''Gramastacus gracilis''. In 1990, ''G. gracilis'' was determined to be a junior synonym of ''G. insolitus''. In 2014, a new species ''

Gramastacus lacus The eastern swamp crayfish (''Gramastacus lacus'') is a species of small freshwater crayfish from coastal New South Wales, Australia. It is distinguished from related species by large genital papilla on the males, large raised postorbital ridges, ...

'' from the coastal regions of

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

was formally described by McCormack.

Species

*Western Swamp Crayfish - ''

'' Riek, 1972 (western Victoria, Australia) - a very small non-burrowing crayfish that shares burrows with larger crayfish species *Eastern Swamp Crayfish - ''

'' McCormack, 2014 (coastal regions of New South Wales, Australia) - a larger, more robust crayfish species that digs their own burrows

References

{{Taxonbar, from=Q20898371 Parastacidae Decapod genera Freshwater crustaceans of Australia