Chasmagnathus convexus

Chasmagnathus convexus

Chasmaganathus converxus, also known as the long backed open mouth crab, belongs to the family of square crabs. Some individuals have a bright purple color all over their body and red joints, which are easily recognizable, but some individuals have a yellowish color that is very similar to Taiwan thick crabs. Cave dwellings are found around grassy marshes near river mouths, between field ridges, mangrove swamps, and along earthen embankments. There are collection records in both the Jianxing ephedra forest and the Wenliao mangrove forest.