Austrothemis nigrescens

Austrothemis nigrescens is a species of dragonfly of the family Libellulidae,[4] commonly known as the swamp flat-tail.[5] It is endemic to southern Australia, where it inhabits lakes and swamps.[6][7] It is a small dragonfly; the male has a flattened abdomen with black and red markings, and the female has black and yellow markings.[5]

Swamp flat-tail
Male

Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Odonata
Infraorder: Anisoptera
Family: Libellulidae
Genus: Austrothemis
Ris, 1912[2]
Species:
A. nigrescens
Binomial name
Austrothemis nigrescens
(Martin, 1901)[3]

Austrothemis nigrescens is the only species in the genus Austrothemis.[5]

  • Wings of Austrothemis nigrescens, Charles Bridges 1994
  • Photo of female wings
  • Photo of male wings
gollark: Not *always*.
gollark: There were also fewer of them working on problems like this than we have now, and they may have missed retrospectively-obvious things.
gollark: Tradition is *a* reason to think something might be better, but a fairly weak one, since the people of the past had rather different values, and not tools like computer simulations or more recent mathematical analyses of voting systems.
gollark: Also, yes, the context is quite different so reasons from then may not apply.
gollark: It's also possible that more complex systems may have been impractical before computers came along, although that doesn't apply to, say, approval voting.

See also

References
  1. Hawking, J. (2009). "Austrothemis nigrescens". IUCN Red List of Threatened Species. 2009: e.T163536A5612932. doi:10.2305/IUCN.UK.2009-2.RLTS.T163536A5612932.en.
  2. Ris, F. (1912). "Libellulinen 6". Collections Zoologiques du Baron Edm. de Selys Longchamps. 14. Brussels: Institut royal des Sciences naturelles de Belgique. pp. 701–836 [738] – via Biodiversity Heritage Library.
  3. Martin, R. (1901). "Les odonates du continent australien". Mémoires de la Société Zoologique de France (in French). 14: 220–248 [222] – via Biodiversity Heritage Library.
  4. "Species Austrothemis nigrescens (Martin, 1901)". Australian Faunal Directory. Australian Biological Resources Study. 2012. Retrieved 22 February 2017.
  5. Theischinger, Günther; Hawking, John (2006). The Complete Field Guide to Dragonflies of Australia. Collingwood, Victoria, Australia: CSIRO Publishing. p. 282. ISBN 978 0 64309 073 6.
  6. Theischinger, Gunther; Endersby, Ian (2009). Identification Guide to the Australian Odonata. Department of Environment, Climate Change and Water NSW. p. 207. ISBN 978 1 74232 475 3.
  7. Watson, J.A.L.; Theischinger, G.; Abbey, H.M. (1991). The Australian Dragonflies: A Guide to the Identification, Distributions and Habitats of Australian Odonata. Melbourne: CSIRO. p. 278. ISBN 0643051368.
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