Talk:Ichthyostega

So it is purely by chance that 'ancestral Five-digits-each-limb' survived to evolve into land-life, the remains of 'ancestral four-/six/eight-digits-each-limb' have not been found and 'ancestral seven-digits-each-limb' emerged but did not evolve? (Is it logical to assume that there is a practical limit on the number of digits on a single limb - or wrist/ankle?) Anna Livia (talk) 14:39, 29 September 2017 (UTC)