(Of a vertebrate limb) having four toes or fingers.
- Unlike other tetradactyl salamanders, S. keyserlingii normally has the fifth tarsale, developing to fuse later with the fourth tarsale.
- In 1991, a single track of a tetradactyl tetrapod was found in a white/grey sandstone near Scarborough, North Yorkshire, England.
- Are trackways known in which the hind-foot impressions are tetradactyl with long, very narrow unguals?
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