Exact(1)
It has three toes on its forelimbs, but two toes on its hind feet.
Similar(7)
Despite its specific name, it has five toes on each foot.
Its hind limb is quite similar in construction to that of Acanthostega, that is to say a paddle with no obvious ankle joint, and it has seven toes arranged in a unique pattern (Coates and Clack 1990).
However, we reexamined specimen 53 and found that it has two toes on some limbs and three toes on others, but it was not heterozygous for any of the otherwise diagnostic nucleotide differences between A. means and A. tridactylum.
Specimen 57 is not available for morphological reexamination, but it had three toes on at least some limbs when collected.
The Papuan swiftlet, Aerodramus papuensis, has three toes instead of the usual four in this group.
Each long, narrow hind foot has four toes, the large fourth toe bearing most of the animal's weight.
And his strangeness (he has seven toes, the tip of a stiletto blade between two ribs: an elaborate back story) can be off-puttingly extreme.
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