Geosesarma
Geosesarma aurantium
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Decapoda
Suborder: Pleocyemata
Infraorder: Brachyura
Family: Sesarmidae
Genus: Geosesarma
De Man, 1892
Type species
Sesarma noduliferum [1]
de Man, 1892

Geosesarma is genus of small freshwater or terrestrial crabs, typically less than 10 mm (0.4 in) across the carapace.[2] They live and reproduce on land with the larval stages inside the egg. They are found from India,[3] through Southeast Asia, to the Solomon Islands and Hawaii.[2]

In the pet trade, they are sometimes called vampire crabs. This has nothing to do with their feeding habits, but rather with the bright, contrastingly yellow eyes of some Geosesarma species.[4]

Species

Geosesarma contains these species:[1]

  • Geosesarma aedituens Naruse & Jaafar, 2009
  • Geosesarma albomita Yeo & Ng, 1999
  • Geosesarma amphinome (De Man, 1899)
  • Geosesarma angustifrons (A. Milne-Edwards, 1869)
  • Geosesarma araneum (Nobili, 1899)
  • Geosesarma aurantium Ng, 1995
  • Geosesarma bau Ng & Jongkar, 2004
  • Geosesarma bicolor Ng & Davie, 1995
  • Geosesarma bintan T. M. Leong, 2014
  • Geosesarma cataracta Ng, 1986
  • Geosesarma celebense (Schenkel, 1902)
  • Geosesarma clavicrure (Schenkel, 1902)
  • Geosesarma confertum (Ortmann, 1894)
  • Geosesarma danumense Ng, 2003
  • Geosesarma dennerle Ng, Schubart & Lukhaup, 2015
  • Geosesarma foxi (Kemp, 1918)
  • Geosesarma gordonae (Serène, 1968)
  • Geosesarma gracillimum (De Man, 1902)
  • Geosesarma hagen Ng, Schubart & Lukhaup, 2015
  • Geosesarma hednon Ng, Liu & Schubart, 2003
  • Geosesarma ianthina Pretzmann, 1985
  • Geosesarma insulare Ng, 1986
  • Geosesarma johnsoni (Serène, 1968)
  • Geosesarma katibas Ng, 1995
  • Geosesarma krathing Ng & Naiyanetr, 1992
  • Geosesarma larsi Ng & Grinang, 2018
  • Geosesarma lawrencei Manuel-Santos & Yeo, 2007
  • Geosesarma leprosum (Schenkel, 1902)
  • Geosesarma maculatum (De Man, 1892)
  • Geosesarma malayanum Ng & Lim, 1986
  • Geosesarma nannophyes (De Man, 1885)
  • Geosesarma nemesis Ng, 1986
  • Geosesarma noduliferum (De Man, 1892)
  • Geosesarma notophorum Ng & C. G. S. Tan, 1995
  • Geosesarma ocypodum (Nobili, 1899)
  • Geosesarma penangense (Tweedie, 1940)
  • Geosesarma peraccae (Nobili, 1903)
  • Geosesarma protos Ng & Takeda, 1992
  • Geosesarma rathbunae (Serène, 1968)
  • Geosesarma rouxi (Serène, 1968)
  • Geosesarma sabanum Ng, 1992
  • Geosesarma sarawakense (Serène, 1968)
  • Geosesarma scandens Ng, 1986
  • Geosesarma serenei Ng, 1986
  • Geosesarma solomonense (Serène, 1968)
  • Geosesarma starmuhlneri Pretzmann, 1984
  • Geosesarma sumatraense Ng, 1986
  • Geosesarma sylvicola (De Man, 1892)
  • Geosesarma ternatense (Serène, 1968)
  • Geosesarma teschi Ng, 1986
  • Geosesarma thelxinoe (De Man, 1908)
  • Geosesarma tiomanicum Ng, 1986
  • Geosesarma vicentense (Rathbun, 1914)

As of March 2015, professor Peter Ng of National University of Singapore has named 20 Geosesarma species, and he "has another half a dozen or so newly collected Geosesarma species from Southeast Asia in his lab, and these species still need to be named and described."[4][5]

Threats

Geosesarma dennerle and Geosesarma hagen, both originally from Java, are threatened by illegal overcollection for the aquarium trade.[6]

References

  1. 1 2 Peter Davie (2012). "Geosesarma de Man, 1892". WoRMS. World Register of Marine Species. Retrieved November 8, 2012.
  2. 1 2 Hartnoll, Richard G. (1998). "Evolution, systematics, and geographical distribution". In Warren W. Burggren; Brian R. McMahon (eds.). Biology of the Land Crabs. Cambridge University Press. pp. 6–54. ISBN 9780521306904.
  3. ↑ Pati, S. K.; Dev Roy, M. K.; Sharma, R. M. "Freshwater crabs" (PDF). Checklist of Indian fauna. Zoological Survey of India. Archived from the original (PDF) on September 17, 2013. Retrieved November 8, 2012.
  4. 1 2 Blaszczak-Boxe, Agata (March 19, 2015). "Mystery of the 'Vampire Crabs' Solved". livescience.com.
  5. ↑ Blaszczak-Boxe, Agata (19 March 2015). "Mystery of the 'Vampire Crabs' Solved". LiveScience. Retrieved 2021-02-11.
  6. ↑ Mahbu, Amri (March 23, 2015). "New Species of Javan Vampire Crabs Face Potential Exploitation".
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