Austruca perplexa

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Species of crab

title: "Austruca perplexa" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["ocypodoidea", "crustaceans-described-in-1837", "taxa-named-by-henri-milne-edwards"] description: "Species of crab" topic_path: "general/ocypodoidea" source: "https://en.wikipedia.org/wiki/Austruca_perplexa" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Species of crab ::

| image = Fiddler Crab - Australia.jpg | genus = Austruca | species = perplexa | authority = (H. Milne-Edwards, 1837) | display_parents = 3 | synonyms =

  • Gelasimus perplexus H. Milne-Edwards, 1837
  • Uca annulipes var. albimana H. Milne-Edwards, 1852
  • Uca lactea perplexa (H. Milne-Edwards, 1837)
  • Uca perplexa (H. Milne-Edwards, 1837)

::figure[src="https://upload.wikimedia.org/wikipedia/commons/0/08/Uca_perplexa_male_waving.gif" caption="publisher=Marine Species Identification Portal}}"] ::

Austruca perplexa was formerly in the genus Uca, but in 2016 it was placed in the genus Austruca, a former subgenus of Uca.

As in other fiddler crabs, the male has a greatly enlarged claw, which is used for signalling. The higher the claw is waved by the male, the greater his chance of attracting a female; the size of the claw is therefore subject to sexual selection. Furthermore, larger male fiddler crabs wave their claws at a faster rate than smaller fiddler crabs to attract larger females. Larger females are more desirable because they produce more eggs than smaller females.

Austruca perplexa is usually found on sandy substrates near river mouths or on sheltered beaches in the mid-intertidal zone, usually near mangroves.

References

References

  1. Peter K. L. Ng. (2008). "Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world". [[Raffles Bulletin of Zoology]].
  2. (October 9, 2008). "Species ''Uca perplexa'' (H. Milne Edwards, 1852)". [[Department of the Environment, Water, Heritage and the Arts]].
  3. "''Uca perplexa''". Marine Species Identification Portal.
  4. Minoru Murai. (2009). "The cost of reliable signaling: experimental evidence for predictable variation among males in a cost-benefit trade-off between sexually selected traits". [[Evolution (journal).
  5. Tina, Fahmida Wazed. (October 2019). "Size‐dependent mating preference of the male fiddler crab Austruca perplexa". Ethology.
  6. (4 April 2015). "Queensland Coast: Guide to Fiddler Crabs of Queensland".

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ocypodoideacrustaceans-described-in-1837taxa-named-by-henri-milne-edwards