Austropyrgus dulvertonensis Tenison-Woods, 1876
Lake Dulverton Austropyrgus (proposed)
Taxonomy & Nomenclature
Synonym/s: Bythinia dulvertonensis Tenison-Woods, 1876; Angrobia dulvertonensis Tenison-Woods, 1876; Fluvidona dulvertonensis Tenison-Woods, 1876
The taxonomy of this species is in disarray. This species may be Bythinia dulvertonensis (Tenison-Woods, 1876), which is a junior synonym of Austropyrgus simsonianus (Brazier, 1875; Mollusc Specialist Group, 1996; Clark et. al. 2003). And if so, the following applies:
"The type locality for Bythinia dulvertonensis is Lake Dulverton, which also ultimately drains into the Derwent River. However, this lake frequently dries out and two attempts to collect hydrobiids have failed; in January, 1987 the lake was completely full, whereas in February, 1995, the lake was completely dry. It is reasonable to assume that the populations previously found in the lake are transient and that populations may or may not be present within the lake, depending on how long the lake holds water and the likelihood of successful dispersal events from nearby areas with extant populations of Austropyrgus. It is also possible that other nearby taxa could be introduced to the lake in the future."
Quoted from (Clark et. al. 2003: 92)
But if this really is a distinct species (which is doubtful), then it was sympatric with Bythinia dulvertonensis in Lake Dulverton. And if at least some individuals of the species were not able to migrate to another body of water, or were not able to reside in "the smallest section near the Callington Mill" which "was able to remain full", then the species is almost certainly now extinct.
Last record: early 1990's
IUCN RedList status: Extinct
Lake Dulverton, Tasmania, Australia
Biology & Ecology
Baillie, J. and Groombridge, B. (eds). (1996). 1996 IUCN Red List of Threatened Animals. pp. 378. International Union for Conservation of Nature, Gland, Switzerland and Cambridge, UK.
Clark, Stephanie A., Miller, Alison C. and Ponder, Winston F. (2003). Revision of the snail genus Austropyrgus (Gastropoda: Hydrobiidae): a morphostatic radiation of freshwater gastropods in southeastern Australia. Records of the Australian Museum, Supplement 28: 1-109. (Warning: 11MB file)
Cowie, Robert H., Régnier, Claire, Fontaine, Benoît, and Bouchet, Philippe. (2017). Measuring the Sixth Extinction: what do mollusks tell us? The Nautilus 131(1): 3-41.
Groombridge, B. (ed.). 1994. 1994 IUCN Red List of Threatened Animals. IUCN, Gland, Switzerland and Cambridge, UK.
Mollusc Specialist Group. (1996a). Fluvidona dulvertonensis. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. (http://www.iucnredlist.org). Downloaded on 28 January 2012.
Mollusc Specialist Group. 1996b. Fluvidona dulvertonensis. The IUCN Red List of Threatened Species 1996: e.T1292A3398300. https://dx.doi.org/10.2305/IUCN.UK.1996.RLTS.T1292A3398300.en. Accessed on 18 June 2022.
Régnier, Claire, Fontaine, Benoît and Bouchet, Philippe. (2009). Not Knowing, Not Recording, Not Listing: Numerous Unnoticed Mollusk Extinctions. Conservation Biology 23(5): 1214-1221.
Wikipedia Contributors. (2011). Lake Dulverton. [Accessed 28/1/2012].