Pseudocumidae

Pseudocumidae is a family of small, freshwater crabs that belong to the infraorder Brachyura. They are found in the rivers and streams of Southeast Asia, particularly in the Mekong and Chao Phraya river basins. Pseudocumidae are characterized by their small size, typically less than 2 centimeters in length, and their distinctive body shape with a broad carapace and long, slender legs.

The family Pseudocumidae includes two genera, Pseudocuma and Pseudocumopsis. Pseudocuma is the larger genus, with over 20 species, while Pseudocumopsis is smaller, with only a few species. Both genera are known for their unique reproductive strategies. Pseudocuma species are brooders, carrying their eggs in a brood pouch on their abdomen until they hatch. Pseudocumopsis species, on the other hand, are ovoviviparous, giving birth to live young.

Pseudocumidae are an important part of the freshwater ecosystems in which they live. They serve as a food source for various predators, including fish and birds, and they also play a role in nutrient cycling by consuming organic matter. However, their small size and limited distribution make them vulnerable to habitat loss and pollution, which are significant threats to their survival. Conservation efforts are needed to protect these unique and fascinating crabs.