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  Neorhynchoplax mangalis (Ng, 1988)
  Family Name : Hymenosomatidae

  Taxonomic Group : Invertebrates (Crustacean, Crab and Prawn)

  Common Names : Mangrove False Spider Crab

Mangrove False Spider Crab
  • Ecology, Habitat & Location
    • Ecological Notes :
      Undisturbed littoral and supralittoral areas of mangroves. With very cryptic habits and often covered with mud and detritus, this species is very difficult to discern when among the mud or algae. It apparently feeds on detritus and tiny animals in the mud. The females bear disproportionately large eggs which hatch to release free-swimming larvae.
      Habitats :
      Mangroves, Marine
      Distribution :
      Known only from relatively pristine mangrove swamps in Singapore and southern Peninsular Malaysia.
  • Conservation
    • Trends & Threats :
      Loss of mangrove swamps to development projects and pollution.
      Scientific Interest & Potential Value :
      The species was described from Singapore and Malaysia in 1988, and has a bizarre reproductive mode - it apparently practices ovovivipary, i.e. the larvae (or zoeae) hatch out inside the mother and exit from the blood pouch via special tears along her abdomen. This is the only crab in teh world known to do this.
      Conservation Notes :
      The species is relatively common in Singapore mangroves, but as it is restricted to relatively more pristine areas, the rapid loss of this habitat threatens its survival. The retention of large areas of good mangroves is the only effective means of conserving the species.
  • Status
    • Singapore Red Data Book 2008 status :
      Vulnerable (VU)
  • References
    • Davison, G.W.H., Ng, P.K.L. & Ho, H.C (Eds.). 2008. The Singapore Red Data Book (2nd Edition). Singapore: Nature Society (Singapore). 285pp 

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