The track also had a large central groove, obviously made by a heavy tail.

Triangular ridges are those that project from the cusp tips of premolar and molars to the central groove.

The central groove in the nasal depression is relatively narrow.

In its midline, it has a central groove (sulcus), that extends up between the bulbs.

Cruziana are excavation trace marks made on the sea floor which have a two-lobed structure with a central groove.

The hot date - the central groove I had been wire brushing - swooned at the sight of them.

In P. predomesticus, there is a central, longitudinal groove with raised margins running along the lower (ventral) side of the premaxilla.

The central groove in the nasal depression is relatively broad and deep.

Inside is a woody centre, with seeds in cavities on either side of the central groove.

It has been used, protection being offered to other road users by placing it in a central groove.