Dicyrtomina ornata anatomy
Here's a supplemental image of this springtail as a follow-up to this post:
I'll use this side view to discuss a bit of anatomy regarding springtails.
1. One thing that immediately stands out is that they are wingless. They spent their lives mostly in the soil, walking around.
2. This particular order of springtails (Symphypleona) is characterized by the thorax and abdomen seemingly fused. This gives them the nick name "globular springtails".
3. Although out of focus in this shot, you can seen an "extra" appendage in between the legs, under the abdomen, pointing forward. It's not an oversized sexual organ, it's a "furca". It's a fork-like tail that the creature uses to catapult itself away when threatened. Here's a much better photo showing this appendage:
4. Keep the previous image in view as it shows another critical appendage that gave them the name "Collembola". On the underside, somewhere around where you imagine a neck or chest might be, is a tube-like appendage. This is called a collaphore. It is believed to be an important and versatile tools for all types of tasks...
...which seem to include surface stabilization, drinking, and cleaning their own body, which is important given their soil life.
5. Unlike insects, springtails are soft-bodied, they lack an exoskeleton. Basically, they have skin. Which is highly water and dirt repellant. They differ in other ways from insects, such as having internal mouth parts and eyes that are more like crustaceans.
Dicyrtomina ornata is one of the small "globular" Springtails (Collembola) from the family Dicyrtomidae. Within its distribution range it is easily found in leaf litter from late fall to early spring. It can be confused with other species of Dicyrtomina, most notably with D. saundersi.