The Trapezioid Crabs

The Trapezioid crabs Tetralia and Trapezia are not actually related – they are actually an example of convergent evolution. So both families have been placed in the super-family Trapezioidea. In the old (ie pre-internet) days of diving on Koh Phangan we had little or no understanding of our smaller marine life – now it gets much more interesting!!

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