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Sayamia Melanodactylus
''Sayamia'' is a genus of freshwater crabs, found in South-East Asia. Three species are included on the list of least concern (lc) arthropods, but ''S. melanodactylus'' is endangered. Species * ''Sayamia bangkokensis ''Sayamia'' is a genus of freshwater crabs, found in South-East Asia. Three species are included on the List of least concern arthropods#Decapods, list of least concern (lc) arthropods, but ''S. melanodactylus'' is endangered. Species * ''Sayam ...'' (Naiyanetr, 1982): Thailand (lc) * '' Sayamia germaini'' (Rathbun, 1902): Cambodia, Thailand, Vietnam (lc) * '' Sayamia maehongsonensis'' (Naiyanetr, 1987): Thailand (VU) * '' Sayamia melanodactylus'' Ng, 1997: Thailand (EN) * '' Sayamia sexpunctata'' (Lanchester, 1906): N. peninsular Malaysia (lc) References External links * * {{Taxonbar, from=Q18593961 Gecarcinucidae Freshwater crustaceans of Asia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Crabs
Around 1,300 species of freshwater crabs are 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 the dispersal abilities of freshwater crabs, so they tend to be endemic to small areas. As a result, a large proportion are threatened with extinction. Systematics More than 1,300 described species of freshwater crabs are known, out of a total of 6,700 species of crabs across all environments. The total number of species of freshwater crabs, including undescribed species, is thought to be up to 65% higher, potentially up to 2,155 species, although most of the additional species are currently unknown to science. They belong to eight families, each with a limited distribution, although various crabs from other families are also able to tolerate freshwater conditions ( euryhaline) or are secon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South-East Asia
Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical south-eastern region of Asia, consisting of the regions that are situated south of mainland China, east of the Indian subcontinent, and north-west of mainland Australia. Southeast Asia is bordered to the north by East Asia, to the west by South Asia and the Bay of Bengal, to the east by Oceania and the Pacific Ocean, and to the south by Australia and the Indian Ocean. Apart from the British Indian Ocean Territory and two out of 26 atolls of Maldives in South Asia, Maritime Southeast Asia is the only other subregion of Asia that lies partly within the Southern Hemisphere. Mainland Southeast Asia is completely in the Northern Hemisphere. East Timor and the southern portion of Indonesia are the only parts that are south of the Equator. The region lies near the intersection of geological plates, with both heavy seismic and volcan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Least Concern Arthropods
In July 2016, the International Union for Conservation of Nature (IUCN) listed 4069 Least-concern species, least concern Arthropoda, arthropod species. Of all evaluated arthropod species, 43% are listed as least concern. The IUCN also lists 27 arthropod subspecies as least concern. No subpopulations of arthropods have been evaluated by the IUCN. This is a complete list of least concern arthropod species and subspecies as evaluated by the IUCN. Chilopoda, Centipedes *''Mecistocephalus angusticeps'' Arachnida, Arachnids There are 21 arachnid species assessed as least concern. Araneae, Spiders *''Argyrodes rostratus'' *Chilobrachys fimbriatus, Fimbriated striated burrowing spider (''Chilobrachys fimbriatus'') *Chilobrachys hardwicki, Eastern Indian striated burrowing spider (''Chilobrachys hardwicki'') *''Cryptothele alluaudi'' *''Damastes validus'' *Hasarius adansoni, Adanson's house jumper (''Hasarius adansoni'') *''Heliophanus activus'' *''Heteroonops tetraspinosus'' *''Mic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sayamia Bangkokensis
''Sayamia'' is a genus of freshwater crabs, found in South-East Asia. Three species are included on the List of least concern arthropods#Decapods, list of least concern (lc) arthropods, but ''S. melanodactylus'' is endangered. Species * ''Sayamia bangkokensis'' (Naiyanetr, 1982): Thailand (lc) * ''Sayamia germaini'' (Rathbun, 1902): Cambodia, Thailand, Vietnam (lc) * ''Sayamia maehongsonensis'' (Naiyanetr, 1987): Thailand (VU) * ''Sayamia melanodactylus'' Ng, 1997: Thailand (EN) * ''Sayamia sexpunctata'' (Lanchester, 1906): N. peninsular Malaysia (lc) References External links * * {{Taxonbar, from=Q18593961 Gecarcinucidae Freshwater crustaceans of Asia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sayamia Germaini
''Sayamia germaini'' is a species of freshwater crabs, now moved from the Parathelphusidae to the subfamily Parathelphusinae, found in Thailand, Cambodia and southern Vietnam. This crab is considered an alien invasive species to Taiwan and is included on the list of least concern arthropods In July 2016, the International Union for Conservation of Nature (IUCN) listed 4069 Least-concern species, least concern Arthropoda, arthropod species. Of all evaluated arthropod species, 43% are listed as least concern. The IUCN also lists 27 a .... References External links *Freshwater Crab Information Web: ''Sayamia germaini'' (retrieved 19 August 2017) {{Taxonbar, from=Q14313949 Gecarcinucidae Freshwater crustaceans of Asia Crustaceans described in 1902 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sayamia Maehongsonensis
''Sayamia'' is a genus of freshwater crabs, found in South-East Asia. Three species are included on the list of least concern (lc) arthropods, but ''S. melanodactylus'' is endangered. Species * ''Sayamia bangkokensis ''Sayamia'' is a genus of freshwater crabs, found in South-East Asia. Three species are included on the List of least concern arthropods#Decapods, list of least concern (lc) arthropods, but ''S. melanodactylus'' is endangered. Species * ''Sayam ...'' (Naiyanetr, 1982): Thailand (lc) * '' Sayamia germaini'' (Rathbun, 1902): Cambodia, Thailand, Vietnam (lc) * '' Sayamia maehongsonensis'' (Naiyanetr, 1987): Thailand (VU) * '' Sayamia melanodactylus'' Ng, 1997: Thailand (EN) * '' Sayamia sexpunctata'' (Lanchester, 1906): N. peninsular Malaysia (lc) References External links * * {{Taxonbar, from=Q18593961 Gecarcinucidae Freshwater crustaceans of Asia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sayamia Melanodactylus
''Sayamia'' is a genus of freshwater crabs, found in South-East Asia. Three species are included on the list of least concern (lc) arthropods, but ''S. melanodactylus'' is endangered. Species * ''Sayamia bangkokensis ''Sayamia'' is a genus of freshwater crabs, found in South-East Asia. Three species are included on the List of least concern arthropods#Decapods, list of least concern (lc) arthropods, but ''S. melanodactylus'' is endangered. Species * ''Sayam ...'' (Naiyanetr, 1982): Thailand (lc) * '' Sayamia germaini'' (Rathbun, 1902): Cambodia, Thailand, Vietnam (lc) * '' Sayamia maehongsonensis'' (Naiyanetr, 1987): Thailand (VU) * '' Sayamia melanodactylus'' Ng, 1997: Thailand (EN) * '' Sayamia sexpunctata'' (Lanchester, 1906): N. peninsular Malaysia (lc) References External links * * {{Taxonbar, from=Q18593961 Gecarcinucidae Freshwater crustaceans of Asia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sayamia Sexpunctata
''Sayamia'' is a genus of freshwater crabs, found in South-East Asia. Three species are included on the list of least concern (lc) arthropods, but ''S. melanodactylus'' is endangered. Species * ''Sayamia bangkokensis ''Sayamia'' is a genus of freshwater crabs, found in South-East Asia. Three species are included on the List of least concern arthropods#Decapods, list of least concern (lc) arthropods, but ''S. melanodactylus'' is endangered. Species * ''Sayam ...'' (Naiyanetr, 1982): Thailand (lc) * '' Sayamia germaini'' (Rathbun, 1902): Cambodia, Thailand, Vietnam (lc) * '' Sayamia maehongsonensis'' (Naiyanetr, 1987): Thailand (VU) * '' Sayamia melanodactylus'' Ng, 1997: Thailand (EN) * '' Sayamia sexpunctata'' (Lanchester, 1906): N. peninsular Malaysia (lc) References External links * * {{Taxonbar, from=Q18593961 Gecarcinucidae Freshwater crustaceans of Asia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gecarcinucidae
The Gecarcinucidae are a family of true freshwater crabs. The family Parathelphusidae is now demoted to the rank of subfamily, as the Parathelphusinae, within the Gecarcinucidae. "Family" Parathelphusidae is now considered as a junior synonym. Taxonomy The Gecarcinucidae are thought to have originated in the Indian subcontinent when it was an island continent in the Paleogene, despite not being of ancient Gondwanan origins themselves (unlike other lineages that are thought to have originated in Insular India). Divergence estimates indicate that the Gecarcinucidae originate from Southeast Asian ancestors that dispersed to India during the middle Eocene, before India collided with Asia. This is thought to have occurred due to India drifting close enough to Southeast Asia to allow for biotic exchange between both regions. As the Gecarcinucidae are a freshwater group that could not disperse via marine habitats, this indicates that temporary land bridges may have formed in the Eoce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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