Is it a mite?—Key feature pages

Ovipore/female genital opening

a) posterior

Centipedes and hexapods have a posteriorposterior:
the back part of the body or towards that region in comparison, e.g., 'posterior to'.
subterminal gonopore. In some mites, the female genital opening sometimes migrates posteriorly on the venterventer:
the lower or under side; opposed to dorsum.
, or rarely to the dorsumdorsum:
the upper or back side; opposed to venter.
.

b) on anterior trunk

Diplopods, pauropods, and symphylans have gonopores on the 3rd–4th segment of the trunk.

c) postcoxal / midbody

In many arachnids, including mites, the female genital opening—usually also the ovipore—is located on segment VIII. Although it appears just behind the last pair of legs, this is because segment VII is often reduced, obscured, or forms part of the narrow waist (pedicel), making it less noticeable. 

Terrestrial crustaceans have gonopores either on the last segment of the thorax or the 1st abdominal segment.

d) intercoxal

In many mites, the female genital opening migrates between the coxae. Also, many groups of mites evolved secondary insemination systems that are dissociated from the ovipore.

Feature pages

• Size
• Wings
• Number of legs or leg-like limbs
• Body segmentation
• Body armor/shell
• Major body regions
• Head or head-like region
• Eyes or eye-like structures
• Antennae or antenna-like structures
• Primary mouthparts
• Palps or pedipalps
• Comb-like structures
• Pedipalpal form
• Venter of head or head-like region
• Respiratory structures
• Recesses into which legs can be withdrawn (pedofossae)
• Ventral processes
• Distal or subterminal abdominal structures
• Ovipore/genital opening
• Discrete anal plates
• Insertion of legs
• Modification and form of leg segments
• Tarsal claws
• Tarsal segmentation
• Silk-producing structures
• Bothridial sensilla
• Large lateral opisthosomal glands
• External brooding