Genus of crabs
Geosesarma freshwater or terrestrial crabs , typically less than 10 mm (0.4 in) across the carapace .[ 2] larval stages inside the egg . They are found from India ,[ 3] 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:[ 5] [ 6]
Geosesarma aedituens Naruse & Jaafar, 2009 Geosesarma albomita Yeo & Ng , 1999 Geosesarma ambawang Ng , 2015Geosesarma amphinome (De Man, 1899) Geosesarma anambas Ng , Wowor & Yeo, 2023Geosesarma angustifrons (A. Milne-Edwards, 1869) Geosesarma araneum (Nobili, 1899) Geosesarma aurantium Ng , 1995Geosesarma batak Manuel-Santos, Ng & Freitag, 2016 Geosesarma bau Ng & Jongkar, 2004 Geosesarma bicolor Ng & Davie, 1995 Geosesarma bintan T. M. Leong, 2014 Geosesarma cataracta Ng , 1986Geosesarma celebense (Schenkel, 1902) Geosesarma clavicrure (Schenkel, 1902) Geosesarma confertum (Ortmann, 1894) Geosesarma danumense Ng , 2003Geosesarma dennerle Ng , Schubart & Lukhaup, 2015Geosesarma foxi (Kemp, 1918) Geosesarma gordonae (Serène, 1968) Geosesarma gracillimum (De Man, 1902) Geosesarma hagen Ng , Schubart & Lukhaup, 2015Geosesarma hednon Ng , Liu & Schubart, 2003Geosesarma ianthina Pretzmann, 1985 Geosesarma insulare Ng , 1986Geosesarma johnsoni (Serène, 1968) Geosesarma katibas Ng , 1995Geosesarma krathing Ng & Naiyanetr, 1992Geosesarma larsi Ng & Grinang, 2018Geosesarma lawrencei Manuel-Santos & Yeo, 2007 Geosesarma leprosum (Schenkel, 1902) Geosesarma maculatum (De Man, 1892) Geosesarma malayanum Ng & Lim, 1986Geosesarma mirum Shy & Ng , 2019 [ 7] Geosesarma nannophyes (De Man, 1885) Geosesarma nemesis Ng , 1986Geosesarma nigripes Ng & Wowor, 2024Geosesarma noduliferum (De Man, 1892) Geosesarma notophorum Ng & C. G. S. Tan, 1995Geosesarma ocypodum (Nobili, 1899) Geosesarma penangense (Tweedie, 1940) Geosesarma peraccae (Nobili, 1903) Geosesarma protos Ng & Takeda, 1992Geosesarma rathbunae (Serène, 1968) Geosesarma riani Ng & Wowor, 2024Geosesarma rouxi (Serène, 1968) Geosesarma sabanum Ng , 1992Geosesarma sarawakense (Serène, 1968) Geosesarma scandens Ng , 1986Geosesarma serenei Ng , 1986Geosesarma solomonense (Serène, 1968) Geosesarma starmuhlneri Pretzmann, 1984 Geosesarma sumatraense Ng , 1986Geosesarma sylvicola (De Man, 1892) Geosesarma ternatense (Serène, 1968) Geosesarma teschi Ng , 1986Geosesarma thelxinoe (De Man, 1908) Geosesarma tiomanicum Ng , 1986Geosesarma 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] [ 8]
Threats
Geosesarma dennerle Geosesarma hagen Java , are threatened by illegal overcollection for the aquarium trade.[ 9]
References
^ Peter Davie (2012). "Geosesarma de Man, 1892" . WoRMS . World Register of Marine Species . Retrieved November 8, 2012 . ^ a b 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 ^ 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 . ^ a b Blaszczak-Boxe, Agata (March 19, 2015). "Mystery of the 'Vampire Crabs' Solved" . livescience.com . ^ Peter K. L. Ng, Daisy Wowor (2024). "Two new species of vampire crabs (Crustacea: Decapoda: Brachyura: Sesarmidae: Geosesarma De Man, 1892) from Java, Indonesia" . Raffles Bulletin of Zoology . 72 : 469– 478. ^ "Geosesarma" . Global Biodiversity Information Facility ^ Shy, Jhy-Yun; Ng, Peter K. L. (2019). "Geosesarma mirum , a new species of semi-terrestrial sesarmid crab (Crustacea, Decapoda, Brachyura) from central Taiwan" . ZooKeys (858): 1– 10. doi :10.3897/zookeys.858.35198 ISSN 1313-2989 . PMC 6614171 PMID 31312087 . ^ Blaszczak-Boxe, Agata (19 March 2015). "Mystery of the 'Vampire Crabs' Solved" . LiveScience . Retrieved 2021-02-11 . ^ Mahbu, Amri (March 23, 2015). "New Species of Javan Vampire Crabs Face Potential Exploitation" .
