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On the TV series Mutant Planet it described them as having the smallest young (5 mg) and the largest sperm cells (larger than a human's; forget the size). I'm not sure how to cite sources on TV, though. :-/ -- HoopoeBaijiKite 03:42, 27 April 2011 (UTC) reply

I'm moving the paragraph below to this page. In some form, it has been here since 4 May 2003. Not only is it unreferenced, I can't find any current science to back it up. On the other hand, the latest cladistic analysis suggests that there may be something like what the paragraph says, based on mtDNA. It's just that the evidence isn't strong enough to overturn current phylogeny.

Many authorities ^who? believe it is sufficiently distinct to be more properly raised to a separate superfamily within the Diprotodontia, or perhaps even further. It is thought to be the sole survivor of an otherwise long-extinct marsupial group. ^{citation needed}

Zyxwv99 ( talk) 19:10, 21 May 2017 (UTC) reply