Many nodosaurids had spikes projecting outward from their shoulders. They consist of a cylinder or disk with teeth projecting radially. It had a roof constructed from slabs thick projecting from each wall toward the centre. This is done by projecting each solid onto a concentric sphere. Echinozoa, which is characterized by a globoid shape without arms or projecting rays. Individual flowers are irregular, with narrow segments which curve backwards and long projecting stamens. The building consists of a central pavilion with two projecting wings. The hyoplastron features a large number of spines projecting around the circumference. They are 'hung' in place through the use of projecting beams. These have a rotor consisting of a solid steel casting with projecting (salient) toothed poles. The sensors work by projecting structured light onto the face. Like their closest relatives the saki monkeys, they have projecting lower incisors. Again, there is an ambiguity caused by projecting the three-dimensional coordinate system into the plane. Auxiliary latitudes are often employed in projecting the ellipsoid. The larvae have large heads with projecting mandibles.