See question title. After doing some looking around on my own I haven't found much so I figured I'd ask some experts.

  • $\begingroup$ What kind of skeleton? $\endgroup$ – J. Musser Jun 21 '14 at 23:33
  • $\begingroup$ what he's asking is if you are talking about bones or including chitin (insects and things like crabs and shrimps) or other exoskeletal structures? $\endgroup$ – shigeta Jun 22 '14 at 0:19
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    $\begingroup$ Shall we include the cytoskeleton? $\endgroup$ – canadianer Jun 22 '14 at 18:34
  • $\begingroup$ further information en.wikipedia.org/wiki/Smallest_organisms $\endgroup$ – The Last Word Jun 23 '14 at 4:34

The smallest vertebrate (if that's what you mean; there are many invertebrates with endoskeletons that are not made of bone) is Paedophryne amanuensis, a Papua New Guinea frog that's about 7 mm long.

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