Io9 remined me of the work of Dougal Dixon, in particular "Man after Man": http://io9.com/5695323/the-horrors-of-evolution-10-freakiest-animals-of-... http://en.wikipedia.org/wiki/Man_After_Man:_An_Anthropology_of_the_Future Lots of ideas here for exsurgents, exhumans and just plain freaky morphs. I especially liked the Vacuumorphs. Maybe this was an early morph design, superseded by the ones in the main book and largely forgotten. One day the PCs discover that someone has moved in on the outside of their habitat... there is actually a whole colony of vacuumorphs living there. The main problem I see with the book is the extreme specialization of many of these species: humans have been successful just because we are so general with our intelligence. It hence seems somewhat unlikely that these humans would specialize (without genetic engineering as in the early chapters) unless they either lost their intelligence or there was a whole ecosystem of post-human species. However, from an EP standpoint these species are all great, and make sense as morphs, weird art projects or exsurgent horrors.