Austrogammarus australis


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Austrogammarus australis
Species Authority: (Sayce, 1901)
Common Name(s):
English Dandenong Freshwater Amphipod, Sherbrooke Amphipod
Gammarus australis Sayce, 1901

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(ii,iii,iv)+2ab(ii,iii,iv) ver 3.1
Year Published: 2014
Date Assessed: 2013-08-08
Assessor(s): Preston, T.
Reviewer(s): Gerlach, J.
This species was previously listed as Extinct based on surveys in the 1980s that did not find any A. australis in the wild (Williams and Barnard 1988). Several surveys since this time have rediscovered small populations of A. australis (Doeg et al. 1996, Papas and Crowther 2007). Austrogammarus australis is listed as ‘Vulnerable’ under the Victorian government Flora and Fauna Guarantee Act 1988. It has an extent of occurrence (EOO) of 35 km2, an area of occupancy (AOO) of 5 km2 and is found at a single location. It is categorised as Critically Endangered based on this highly restricted range, all of which is threatened by degradation of water quality through pollution and invasive species.
1996 Extinct
1994 Extinct? (Groombridge 1994)

Geographic Range [top]

Range Description: The species appears to be restricted to the Dandenong Mountain Range in southern Victoria, Australia (Papas and Crowther 2007).
Australia (Victoria)
Range Map: Click here to open the map viewer and explore range.

Population [top]


A total of 287 individuals have been identified using methods described in Papas and Crowther (2007). There are no data available on current population estimates.

Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: It occurs in upland cool freshwater streams with intact riparian vegetation and canopy cover of more than 75%.  It is restricted to the Dandenong Mountain Ranges, Victoria, Australia.
Systems: Freshwater

Threats [top]

Major Threat(s): This species is threatened by urbanization, run-off from roads (both sealed and unsealed), damage to or removal of riparian vegetation and weed invasion of the riparian zone.

Conservation Actions [top]

Conservation Actions: The only known living animals occur at a site in the Dandenong Ranges National Park.

Citation: Preston, T. 2014. Austrogammarus australis. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 26 March 2015.
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