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
Less than 10,000 years ago, however, many of these horse-like species became extinct, along with other browsing animals such as mammoths. Climate changes and over-hunting by humans may have been to blame, but no one knows for sure.