Purple Marsh Crab
Location: Upper Guinean forests of Guinea and Sierra Leone
This species is one of only five species that belong to a rare group of freshwater crabs endemic to the upper Guinea forest block of West Africa. These crabs do not need to be immersed in water (as do their relatives that live in streams and rivers), and can meet their water requirements (such as keeping its respiratory membranes moist and osmoregulation of body fluids) with the small amount of muddy water that collects at the bottom of their burrows. This species is clearly a competent air-breather and has a pair of well-developed pseudolungs.
The major present and future threats to the purple marsh crab include habitat loss/degradation (human induced) due to human population increases, deforestation, and associated increased agriculture in northwest Guinea.