Reproduction Cycle Among Unicellular Life Forms Under the Rocks of Mars

Seemingly incorporates or remakes and expands upon the director's childhood claymation film, The Wad and the Worm (1969), in which (according to a description I read) a dinosaur eats a worm, regurgitates it, upon which the worm metamorphizes into a huge hand that smashes the dinosaur. Reproduction Cycle (which I have seen) uses claymation to follow the life of the Martian "Peenworm" which similarly involves feeding, vomiting, metamorphosis, and partial self-destruction.