Well, unfortunately all of the original discussions I had had with Silvak and Zequr were on the Gameware forums. So when they shut down suddenly, all those conversations were lost. And my memory is terrible.
Writing this post made me remember, I believe Silvak's idea was that the Catallipac and Deadalus weren't just children of Capillata, they were children of Capillata and the Ark. I don't think Zequr had a backstory for Morpheri other that "another child of Capillata". But logically it would also be child of the Ark because it also uses C3 graphics.
So yeah, "a child of Capillata and the Ark". Perhaps the Lone Shee needed more room or more ships and created them from the DNA of Capilllata and the Shee Ark? That sounds kinda cool, I may see what I can do with that and put it in the catalogue file for version 2.0 whenever I do that.
Something like this from http://creaturescaves.com/forum.php?view=12&thread=6830&page=2