Sphaeriodes ventricosa produced a compact, almost spherical fruit stone with a heavy woody wall. The exterior is coarsely nodular to rugose rather than arranged into the neat reticulate ridges typical of Iodes. At the apex the stylar region is accompanied by paired knob-like structures, while internally the primary vascular bundle is embedded in the wall and the locule lining carries minute papillae.

The internal anatomy resembles Iodes in several respects, but the globose form, very thick wall and coarse external sculpture are distinctive enough for Sphaeriodes to remain a separate fossil genus. The endocarp enclosed a single seed inside a drupaceous fruit; the softer flesh is not preserved. Nothing in the fossil directly identifies the parent plant as a tree, shrub or climber, so its life form should be described only at the broader woody-Icacinaceae level.