{{Short description|Genus of crayfishes}} {{Automatic taxobox | image = The-eastern-swamp-crayfish-Gramastacus-lacus-sp.-n.-(Decapoda-Parastacidae)-a-new-species-of-zookeys-398-053-g001.jpg | image_caption = ''Gramastacus lacus'' | taxon = Gramastacus | authority = Riek, 1972 | subdivision_ranks = Species | subdivision = * ''Gramastacus insolitus'' <small>Riek, 1972</small> * ''Gramastacus lacus'' <small>McCormack, 2014</small> }}
'''''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 Victoria, Australia: ''Gramastacus insolitus'' and ''Gramastacus gracilis''. In 1990, ''G. gracilis'' was determined to be a junior synonym of ''G. insolitus''. In 2014, a new species ''Gramastacus lacus'' from the coastal regions of New South Wales was formally described by McCormack.<ref name="ZooKeys">{{Cite journal |last=McCormack |first=Robert B. |title=The eastern swamp crayfish ''Gramastacus lacus'' sp. n. (Decapoda, Parastacidae) a new species of freshwater crayfish from coastal New South Wales, Australia |journal=ZooKeys |date=4 April 2014 |issue=398|pages=53–67 |pmid=24715801 |publisher=Pensoft Publishers |doi=10.3897/zookeys.398.7544 |url=https://zookeys.pensoft.net/articles.php?id=3693 |pmc=3978226 |doi-access=free }}</ref>
==Species== *'''Western Swamp Crayfish''' - ''Gramastacus insolitus'' <small>Riek, 1972</small> (western Victoria, Australia) - a very small non-burrowing crayfish that shares burrows with larger crayfish species *'''Eastern Swamp Crayfish''' - ''Gramastacus lacus'' <small>McCormack, 2014</small> (coastal regions of New South Wales, Australia) - a larger, more robust crayfish species that digs their own burrows
==References== {{Reflist}}
{{Taxonbar|from=Q20898371}}
Category:Parastacidae Category:Decapod genera Category:Freshwater crustaceans of Australia