| Located at the base of the skull, the medulla oblongata is continuous with the spinal cord at the foramen magnum. |
| Lateral surfaces of the centrum longitudinally concave and transversally rounded, one foramen on each side. |
| Archerops further differs from Coelops species in its tall zygomatic process, smaller foramen ovale, and very narrow antorbital bar. |
| The jugular foramen may be divided into two parts by intrajugular processes. |
| Neither specimen shows evidence of an incisive foramen or other vacuity in the parts of the palatal process that are preserved. |
| Above the buttress is the oculomotor myodome, with the foramen for the oculomotor nerve. |
