''Geosesarma'' is genus of small

freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ...

or terrestrial crabs, typically less than across the

carapace A carapace is a Dorsum (biology), dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tor ...

. They live and reproduce on land with the larval stages inside the

egg An egg is an organic vessel grown by an animal to carry a possibly fertilized egg cell (a zygote) and to incubate from it an embryo within the egg until the embryo has become an animal fetus that can survive on its own, at which point the a ...

. They are found from India, through Southeast Asia, to the Solomon Islands and Hawaii. 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.

Species

''Geosesarma'' contains these species: *'' Geosesarma aedituens'' Naruse & Jaafar, 2009 *'' Geosesarma albomita'' Yeo & Ng, 1999 *''

Geosesarma amphinome ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' (De Man, 1899) *'' Geosesarma angustifrons'' (A. Milne-Edwards, 1869) *'' Geosesarma araneum'' (Nobili, 1899) *''

Geosesarma aurantium ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' Ng, 1995 *''

Geosesarma bau ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' Ng & Jongkar, 2004 *''

Geosesarma bicolor ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' Ng & Davie, 1995 *''

Geosesarma bintan ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' T. M. Leong, 2014 *''

Geosesarma cataracta ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' Ng, 1986 *''

Geosesarma celebense ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' (Schenkel, 1902) *''

Geosesarma clavicrure ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' (Schenkel, 1902) *''

Geosesarma confertum ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' (Ortmann, 1894) *''

Geosesarma danumense ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' Ng, 2003 *''

Geosesarma dennerle ''Geosesarma dennerle'' is a species of small land-living crabs found on Java, Indonesia. It is popular in the aquarium trade, where G. dennerle, in particular, is often simply called "Vampire Crab". Crabs called "Geosesarma bicolor Krakatau Vam ...

'' Ng, Schubart & Lukhaup, 2015 *''

Geosesarma foxi ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' (Kemp, 1918) *''

Geosesarma gordonae ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solomon ...

'' (Serène, 1968) *'' Geosesarma gracillimum'' (De Man, 1902) *''

Geosesarma hagen Red Devil Vampire Crabs are decapod crustaceans part of Brachyura (from the Greek ''βραχύς'' = short, ''οὐρά'' = tail/abdomen). They are land living, freshwater crabs from tropical areas and are endemic to Indonesia. Like all other c ...

'' Ng, Schubart & Lukhaup, 2015 *'' Geosesarma hednon'' Ng, Liu & Schubart, 2003 *'' Geosesarma ianthina'' Pretzmann, 1985 *'' Geosesarma insulare'' Ng, 1986 *'' Geosesarma johnsoni'' (Serène, 1968) *''

Geosesarma katibas ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solo ...

'' Ng, 1995 *'' Geosesarma krathing'' Ng & Naiyanetr, 1992 *'' Geosesarma larsi'' Ng & Grinang, 2018 *''

Geosesarma lawrencei ''Geosearma lawrencei'' is a species of crab Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden ...

'' Manuel-Santos & Yeo, 2007 *'' Geosesarma leprosum'' (Schenkel, 1902) *'' Geosesarma maculatum'' (De Man, 1892) *''

Geosesarma malayanum ''Geosesarma malayanum'' is a species of small red crab found in Malaysia. It is famous for its relationship with pitcher plants; as such, it is classified as a nepenthephile. ''G. malayanum'' is known to visit ''Nepenthes ampullaria'' plants a ...

'' Ng & Lim, 1986 *''

Geosesarma nannophyes ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solo ...

'' (De Man, 1885) *'' Geosesarma nemesis'' Ng, 1986 *'' Geosesarma noduliferum'' (De Man, 1892) *'' Geosesarma notophorum'' Ng & C. G. S. Tan, 1995 *''

Geosesarma ocypodum ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solo ...

'' (Nobili, 1899) *'' Geosesarma penangense'' (Tweedie, 1940) *''

Geosesarma peraccae ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solo ...

'' (Nobili, 1903) *''

Geosesarma protos ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solo ...

'' Ng & Takeda, 1992 *'' Geosesarma rathbunae'' (Serène, 1968) *''

Geosesarma rouxi ''Geosesarma rouxi'' is a species of small, semi-terrestrial freshwater crabs native to Java, Indonesia. They are commonly known in the pet trade as rainbow vampire crabs. __TOC__ Description Adult ''G. rouxi'' can reach 2 inches in size, w ...

'' (Serène, 1968) *'' Geosesarma sabanum'' Ng, 1992 *'' Geosesarma sarawakense'' (Serène, 1968) *''

Geosesarma scandens ''Geosesarma'' is genus of small freshwater crab, freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the crustacean larvae, larval stages inside the egg (biology), egg. They are found f ...

'' Ng, 1986 *'' Geosesarma serenei'' Ng, 1986 *'' Geosesarma solomonense'' (Serène, 1968) *'' Geosesarma starmuhlneri'' Pretzmann, 1984 *'' Geosesarma sumatraense'' Ng, 1986 *''

Geosesarma sylvicola ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solo ...

'' (De Man, 1892) *'' Geosesarma ternatense'' (Serène, 1968) *'' Geosesarma teschi'' Ng, 1986 *'' Geosesarma thelxinoe'' (De Man, 1908) *'' Geosesarma tiomanicum'' Ng, 1986 *''

Geosesarma vicentense ''Geosesarma'' is genus of small freshwater or terrestrial crabs, typically less than across the carapace. They live and reproduce on land with the larval stages inside the egg. They are found from India, through Southeast Asia, to the Solo ...

'' (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."

Threats

'' and ''

'', both originally from Java, are threatened by illegal overcollection for the aquarium trade.

References

External links

* Grapsoidea Terrestrial crustaceans Taxa named by Johannes Govertus de Man {{crab-stub