Johora
Encyclopedia
Johora is a genus
of freshwater crab
s found in the Malay Peninsula
and surrounding islands. It includes the following species:
Four of the species are listed as vulnerable species
by the International Union for Conservation of Nature, one is Near Threatened
, one is Data Deficient
, and one, Johora singaporensis
, is Critically Endangered
.
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of freshwater crab
Freshwater crab
There are around 1,300 species of freshwater crabs, distributed throughout the tropics and subtropics, divided among eight families. They show direct development and maternal care of a small number of offspring, in contrast to marine crabs which release thousands of planktonic larvae. This limits...
s found in the Malay Peninsula
Malay Peninsula
The Malay Peninsula or Thai-Malay Peninsula is a peninsula in Southeast Asia. The land mass runs approximately north-south and, at its terminus, is the southern-most point of the Asian mainland...
and surrounding islands. It includes the following species:
- Johora aipooae (Ng, 1986)
- Johora counsilmani (Ng, 1985)
- Johora gapensis (Bott, 1966)
- Johora grallator Ng, 1988
- Johora gua Yeo, 2001
- Johora hoiseni Ng & Takeda, 1992
- Johora intermedia (Ng, 1986)
- Johora johorensis (Roux, 1936)
- Johora murphyi (Ng, 1986)
- Johora punicea (Ng, 1985)
- Johora singaporensisJohora singaporensisJohora singaporensis, the Singapore stream crab or Singapore freshwater crab, is a critically endangered species of freshwater crab endemic to Singapore. It grows to a size of wide.-Ecology:...
(Ng, 1986) - Johora tahanensis (Bott, 1966)
- Johora thaiana Leelawathanagoon, Lheknim & Ng, 2005
- Johora thoi Ng, 1990
- Johora tiomanensis (Ng & L. W. H. Tan, 1984)
Four of the species are listed as vulnerable species
Vulnerable species
On 30 January 2010, the IUCN Red List of Threatened Species identified 9694 Vulnerable species, subspecies and varieties, stocks and sub-populations.-References:...
by the International Union for Conservation of Nature, one is Near Threatened
Near Threatened
Near Threatened is a conservation status assigned to species or lower taxa that may be considered threatened with extinction in the near future, although it does not currently qualify for the threatened status...
, one is Data Deficient
Data Deficient
Data Deficient is a category applied by the IUCN, other agencies, and individuals to a species when the available information is not sufficient for a proper assessment of conservation status to be made...
, and one, Johora singaporensis
Johora singaporensis
Johora singaporensis, the Singapore stream crab or Singapore freshwater crab, is a critically endangered species of freshwater crab endemic to Singapore. It grows to a size of wide.-Ecology:...
, is Critically Endangered
Critically Endangered
Critically Endangered is the highest risk category assigned by the IUCN Red List for wild species. Critically Endangered means that a species' numbers have decreased, or will decrease, by 80% within three generations....
.