Mictyris

Mictyris is a genus of brightly coloured crabs, placed in its own taxonomical family, the Mictyridae.[1] It inhabits the central Indo-West Pacific region. These crabs congregate on mud flats or beaches in groups of a few thousand, and filter sand or mud for microscopic organisms. They congregate during low tide, and bury themselves in the sand during high tide or whenever they are threatened. This is done in wet sand, and they dig in a corkscrew pattern, leaving many small round pellets of sand behind them.

Mictyris
Light-blue soldier crab, Mictyris longicarpus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Brachyura
Superfamily: Ocypodoidea
Family: Mictyridae
Dana, 1851
Genus: Mictyris
Latreille, 1806

Species

The genus contains eight species:[1][2][3] [4]

ImageScientific nameDistribution
Mictyris brevidactylus Stimpson, 1858Japan, China (including the type location, Hong Kong), Taiwan, Singapore, and parts of Indonesia (Karakelong, Bawean and Ambon Island)
Mictyris darwinensis Unno & Semeniuk, 2011Australia(Kimberley to Cape York)
Mictyris guinotae Davie et al., 2010Ryukyu Islands of Japan
Mictyris livingstonei McNeill, 1926Australia
Mictyris longicarpus Latreille, 1806Bay of Bengal to New Caledonia and Australia
Mictyris occidentalis Unno, 2008Australia(King Bay, Dampier Archipelago)
Mictyris platycheles H. Milne-Edwards, 1852Tasmania and Australia(Victoria to Queensland)
Mictyris thailandensis Davie, Wisespongpand & Shih, 2013Thailand

The predictable behaviour of these crabs has led them to be used in experiments in a form of billiard ball computer.[5][6]

References

  1. Peter K. L. Ng; Danièle Guinot & Peter J. F. Davie (2008). "Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world" (PDF). Raffles Bulletin of Zoology. 17: 1–286. Archived from the original (PDF) on 2011-06-06.
  2. Peter Davie (2010). "Mictyris Latreille, 1806". WoRMS. World Register of Marine Species. Retrieved April 15, 2012.
  3. Peter J. F. Davie; Hsi-Te Shih & Benny K. K. Chan (2010). "A new species of Mictyris (Decapoda, Brachyura, Mictyridae) from the Ryukyu Islands, Japan". Studies on Brachyura: a Homage to Danièle Guinot (PDF). pp. 83–105. doi:10.1163/ej.9789004170865.i-366.61. ISBN 9789047424178. Archived (PDF) from the original on 2019-12-06.
  4. Unno, J. & Semeniuk, V. (2011). "A new species of Mictyris (Crustacea: Decapoda: Brachyura: Mictyridae) recorded from northern Australia Kimberley region to Cape York" (PDF). Journal of the Royal Society of Western Australia. 94: 45–54.
  5. Jacob Aron (April 12, 2012). "Computers powered by swarms of crabs". New Scientist. Archived from the original on 2012-09-05. Retrieved April 15, 2012.
  6. Yukio-Pegio Gunji; Yuta Nishiyama & Andrew Adamatzky (2011). "Robust soldier crab ball gate". Complex Systems. 20: 2. arXiv:1204.1749. Bibcode:2012arXiv1204.1749G.
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