Apparently this is a series. I’ve found a real Tomb Colonist.
"English evolutionary theorist William Hamilton […] wrote about how he would like his own burial to go. He wanted his body carried to the forests of Brazil and laid out to be eaten from the inside by an enormous winged Coprophanaeus beetle using his body to nurture its young, who would emerge from him and fly off."
This is quoted in Peter Godfrey-Smith’s book Other Minds: The Octopus, the Sea, and the Deep Origins of Consciousness.