| It is more erect, the branching more open, and the caps at the ends of the branches are more or less circular and umbilicate. |
| By contrast, a narrowly umbilicate and thin shell possesses slender and dense ornamentation. |
| Almost no widely umbilicate species existed, and only three morphs occupied a comparatively small area of the morphospace. |
| In some of the species of Omphalia the pileus is not umbilicate, but here the gills are plainly decurrent. |
| Sometimes they are umbilicate below, so that a vertical section would be obcordate. |
| Sporangia plane, umbilicate, attached to the wall by an elastic cord. |
