Micrococcus luteus is a Gram-positive, to Gram-variable, nonmotile, Coccus, saprotrophic bacterium that belongs to the family Micrococcaceae. It is urease and catalase positive.
Why is a mammoth more likely to fossilize than a caterpillar? A mammoth is more likely to fossilize than a caterpillar because a caterpillar has no hard tissue. Bones and cartilage are much more likely to fossilize. Edit
Some caterpillars use silk for different reasons than spiders, creating their own habitats or safe places to metamorphose into adults. Not all caterpillars make silk, and some, such as silkworms, spin such quality silk that they are bred specifically for their spinning abilities.