Figure 4. Flowchart explaining the construction of names for fossae associated with the parapophysis, divided laminae, and the eprl.

These decision trees show how to name fossae. Rounded rectangles are starting/stopping points, and diamonds represent decisions. Pneumatic fossae associated with the parapophysis In dorsal vertebrae can act as either a primary or secondary landmarks (see text for explanation). Sets of bipartite and tripartite names associated with the parapophysis are shown at left. Diapophyseal fossae are in blue, and parapophyseal fossae are in orange. “Impossible” fossae are rendered semi-transparent. At right are shown fossae associated with divided laminae and the spinodiapophyseal fossa (sdf).