Compared to most iguanian, gekkotan, and scincomorphan lizards, which generally have 24–26 vertebrae in front of the sacrum (or hip), E. schroederi had 31, including 7 neck vertebrae and approximately 24 back vertebrae. E. gouldi had 6–7 neck vertebrae, and an unknown number of back vertebrae. In E. gouldi, the second (axis) and third neck vertebrae were connected to the next by elements known as intercentra. In E. schroederi, most of the neck vertebrae lacked cervical ribs, save for the last two. The upward-projecting neural spines on the back vertebrae were small, and the last few back vertebrae lacked ribs in the vein of lumbar vertebrae. Zygosphene-zygantrum articulations are present on the back vertebrae of both species. The ribs were single-headed and had circular articulating surfaces. In E. gouldi, the centra (main bodies) of the tail vertebrae were broad, cylindrical, amphicoelous (concave on both ends), and bore strongly developed transverse processes.
