| In comparison to known species of the genus, Rhopalocoelia bachuensis, is a relatively larger and broader obconical sponge. |
| Abdomen obconical, longer than distance from head to cruciform elevation. |
| Most genera included in the family are steeply obconical to cylindrical, but a few are ovoid, at least as flattened. |
| The specimen is a large, broadly obconical sponge with broken base and subhemispherical uppermost oscular margin. |
| The pyxidium has the trigonoidly cylindrical or obconical form of that of Couratari, but it is much thicker, heavier, and more solid in substance. |
| When the joints are obconical, with the vertex of the cone rounded. |
