genera all show very long, toothed claws with a bulbous base, with one claw much longer than the other.。本物种在型态上与上述两个属相同，但当使用细胞色素c氧化酶对DNA测序时，本物种的结果显示与这两个属只是旁系群关系，未至于同属一个科。It is distinguished from either genus by the unusual, T-shaped form of the .